Blooming in late spring to early summer, this Giant Allium enjoys long-lasting blooms and remains ornamental in the garden well into summer. OUT OF STOCK. In this plant combination, the while allium flowers bring a freshness and contrast to the otherwise green and purple display. Full sun in well-drained soil (add griton heavy soils). When flower is fully open it can measure up to 15cm in diameter. The pink-colored florescence of this hardy kind of allium has a diameter of about 20 centimeters. Water the bulb well once in situ. The ideal months are from September to mid November but as late as the middle of December is acceptable. They have a fragrance that resembles garlic or onion. Poisonous through ingestion. The single tall stem, supports a round cluster of purple flowers, resembling a big, soft, beautiful pom-pom. A good rule for spacing ornamental onion is one bulb per square foot. They come up as a tight, upright cluster and then usually lie flat at the base of the plant. Flower stem bulblets are collected during the summer. In fall, set all but the largest bulbs 4 … Exposure: Full Sun. Plant behind or among low growing perennials or annuals for a distinctive touch in any garden. Allium giganteum - Growing Guide. Mature bulbs may be dug up in fall, divided and replanted to increase size of a planting. Alliums work well in a cottage style garden, you can also mass plant … Growing allium is easy. Perhaps the tallest of the ornamental onions, Allium giganteum is a striking and bold addition to the garden with its star-shaped, tiny lilac-purple flowers forming a 5-6 in. Cultivation Easy to grow in fertile well-drained soil. If the bulb you buy has signs of a green mould on … The purple star-shaped flowers are small, 6-parted, and in a cluster 5-6 inches wide at the top of a naked stem. The Allium bulbs need to be planted pointy end up. Favorite Alliums . Alliums aren’t too picky: In most cases, alliums grow in average garden soil and need full sun and good drainage. Ornamental Onion is a bulbous perennial characterized by its showy pink flowers and its garlic onion fragrance. Fertilize allium bulbs once a month as soon as shoots emerge. Plant the allium bulbs with the pointy end facing up. This will hide the old foliage which … Use a 10-10-10 or similar bulb-type fertilizer. Ships: September through December The tall stems of Allium giganteum grow to around 120cm tall and it is this height that can be used to create memorable floral displays, adding a whole other dimension to the garden. Herbaceous alliums (such as Allium tuberosum and Allium Millenium) have fiberous roots like other perennials. Read our guide to creating an alpine scree garden. Alliums will grow in light shade but tend to develop stronger stems in brighter light. However, growing Allium giganteum from seeds is surprisingly easy and as a hardy plant you can choose to grow … Plant bulbs 5-6” deep and 9-12” apart in fall. Plant bulbs 5-6” deep and 9-12” apart in fall. Allium giganteum, commonly called giant onion, is perhaps the tallest of the ornamental onions. Where to plant allium bulbs. Hardiness: Alliums can be grown in Zones 3 to 9, depending upon the species and cultivar. Blossoms the size of softballs sway atop lofty stems in late spring, at about the time the Dutch iris bloom. The bulb is susceptible to penicillin mould. © 2020 Netherland Bulb Company • Produced by Clarity Connect, Inc. Big, show stopper allium! Perhaps the tallest of the ornamental onions, Allium giganteum is a striking and bold addition to the garden with its star-shaped, tiny lilac-purple flowers forming a 5-6 in. You will need to read the descriptions closely. Origin: Asia (particularly Turkey and Iran) and Europe (especially in the Mediterranean area) How to plant alliums. ALLIUM GIGANTEUM Pack of 1 $ 26.00 Sold/Out of Season; ALLIUM DRUMSTICK Pack of 10 $ 9.70 Sold/Out of Season; ALLIUM PINK Pack of 10 $ 8.90 Sold/Out of Season; ALLIUM PURPLE RAIN Pack of 2 $ 9.70 Sold/Out of Season; Allium. Add to Wishlist. and cvs. Giant Allium Allium giganteum . Plant allium bulbs once the trees start losing their leaves. Allium Bulgaricum {"id":8205931846,"title":"Allium … of fertilizer to every 10 square feet of planted area. The flower is handsome from the get go and lasts for around seven or … Bulbs are less sensitive to temperature extremes than most plants … You may also notice a few sprouts in the fall if you live in warmer climates, but most stems and buds form in the spring. Allium giganteum is a tall onion species native to Central Asia. Alliums are versatile plants that work well in just about any planting scheme. The allium giganteum can grow up to a height of 150 centimeters, which is why this extremely popular kind has the nickname giant allium. Dig holes and plant the bulbs 4-8" deep and 6"-8" apart, depending on the variety. Alliums all come from the onion family but Allium giganteum is an ever popular ornamental plant often used singly, or in clumps in borders, to heighten the overall effect. It should be planted at a depth of 8” to the base of the bulb and 12” apart. Alliums are deer resistant and easy to grow in well-drained soil in full sun to partial shade. Use 7 tbsp. of fertilizer to every 10 square feet of planted area. Often die down shortly after blooming has occurred. Ornamental onion, Allium giganteum. If you plant a pale allium find it a warm spot. The Allium genus iself is a genus that features every type of onion, from garlic through to shallots. Push your bulbs into the bottom of the trench/hole, leaving a gap of at least 3 times the bulb width between each bulb (see above) and then cover them up – if on heavy soil, mix in about one-third grit to two-thirds soil. This bulbous perennial produces a flower which can stand 4-5ft above ground level in maturity. Allium schubertii has huge flower heads, 30cm across, in a glistening metallic purple, while Allium cristophii has large loose heads of starry purple individual flowers. You will rarely have to worry about watering them as they actually prefer dry conditions. A good tip to know how deep to plant it is to multiply the height of the bulb by 3. Plant the bulbs in a multi-purpose compost and water thoroughly. Quick View. Cultivation. Geum and verbascum. Although ornamental onion tolerates summer drought, it should be kept moist during the growing season. How to Plant your Allium Bulbs: In most cases, you will want to fertilize your allium bulb planting site with bulb food to ensure that the bulbs are properly established. There's a good amount of variety in Allium plants. However, the plant also has poisonous characteristics as noted in the "Poisonous to Humans" section of this record. A good rule for spacing ornamental onion is one bulb per square foot. Most alliums peak around May, but for later flowers look to Allium sphaerocephalon , which forms green buds in June that open to deep maroon … The beautiful curled green leaves will wither before the flowers appear in early summer so we recommend accompanying them with low-growing plants to provide filling foliage over the base areas and covering up those stems. These tall, lofty perennials have a lush bright purple bloom that can help to add elegance and style to your garden. You can readily purchase them in the spring as bulbs - huge bulbs obviously - but as you can imagine, just one bulb can be pricey. Typically not susceptible to animals. Water well after planting… The bulb … Adding Allium … Planting Allium Bulbs Most gardeners grow giant allium from allium bulbs and, like the plants, the bulbs are huge, some 7 inches in diameter. Autumn & early winter - which is peak bulb planting time for so many bulbs - is also the best time for alliums. Where are Plant Finder & Plant Selector? Alliums can be grown in alpine screes. With us it is more commonly 3-4ft tall. Gather leaves during spring and fall. $14.95 . For best results plant in the fall with access to full sunlight in well-drained soils. Planting … For best results plant in the fall with access to full sunlight in well-drained soils. The biggest difference is the size of the plants and their flowers. The best time to plant the bulbs is when they’re dormant in the fall. Out for Season. For best results, we recommend planting your allium bulbs just over twice as deep as the height of the bulb and about 5 or 6 inches apart. This plant will do well near the back of the border in groups of 5-9. The white forms look more handsome in semi-shade. Drought tolerant. Depending on species and variety, they may grow in U.S. Department of Agriculture plant hardiness zones 3 through 10. Plant allium bulbs at twice the depth of the bulb… Water well after planting. They are found growing predominantly throughout the cooler regions of the Western Hemisphere. Planting In Pots. Noteworthy Characteristics. Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience. These are a bulb that have low water requirements and with large flower heads (see picture right) are a colourful addition to the garden border. Move to a cold frame and plant out the during following spring, at a distance of 30cm (12") apart, in light sandy, well drained soil in full sun. Soil must be light and drain well, and even poor soil is fine. Alliums should be planted in part to full sun in well-draining soil. Your bulbs may have had enough of a chilling period to … A very large variety, this Allium bears umbels of distinct violet flowers. Dig holes about 3″ deep and 6-8″ apart. Allium Giganteum Bulbs | Giant Blooming Onion Perhaps the tallest of the large flowering alliums, Giganteum is a horticultural Amazon that catches the eyes of even non-gardeners. Ornamental Allium bulbs such as ‘globemaster’, gladiator’ and ‘giganteum’ are easy care, sun loving plants, easy to grow. Other … It should be planted at a depth of 8” to the base of the bulb and 12” apart. They grow from bulbs which look and smell like onions. Type: Alliums It is 35-50 inches tall with a large umbel of densely clumped florets. Autumn & early winter - which is peak bulb planting time for so many bulbs - is also the best time for alliums. The flowers of the Allium giganteum are impressive by anyone's standards, and a personal favourite of my own. 'giganteum… In this plant combination, the while allium flowers bring a freshness and contrast to the otherwise green and purple display. Commonly called giant onion, it is most likely the tallest of the ornamental onions. The beautiful curled green leaves will wither before the flowers appear in early summer so we recommend accompanying them with low-growing plants … Although alliums are grown largely for their use as a food crop, there are many varieties of allium … Allium giganteum is planted in fall more or less 4 to 5 inches (10 to 12 cm) deep in light soil. Plant allium bulbs in the fall as you would any other bulb. Read our guide to creating an alpine scree garden. Add grit when grown in clay soils to improve drainage. Color is, in fact, the main draw in growing this type of flowering onion, as the blooms are small compared to many hybriid alliums. Alliums are tough, are reasonably drought tolerant and will cope with poor soil. Great ornamental value in the landscape and amazing cut or dried flowers. Drumstick alliums only grow about one foot tall with one-inch flower heads, while giant 'Globemaster' can top four feet in height and sport huge globes of eight-to-ten-inch flower heads. Good cut or dried. Consult with a medical professional for further details. When growing alliums, plant them where the leaves of other plants will cover the base of their stems. Great ornamental value in the landscape and amazing cut or dried flowers. This plant will do well near the back of the border in groups of 5-9. It’s made up of perfect little purple florets that create a large round ball on top of a sturdy stem, similar to a topiary. For the best flowering and healthiest plants… Plant allium bulbs 4 times the size of the bulb below the surface of the soil, pointy side up. Alliums could also be planted in large clusters for an eye-catching focal point. Allium cepa (onion, scallion, spring onion) is cultivated for its pungent bulbs. How to Grow Allium giganteum Plants in your Garden Gardener's HQ Guide to Growing Giant Onion. Allium Giganteum. Alliums are generally plants of sunny and well-drained soils. It generally flowers in early summer and lasts 2-3 weeks. Plant alliums in autumn for great display the following summer. Mind you, I’ve always thought that leeks, when left to run to seed, are statuesque plants. Inside each bulb is a living plant and it will not survive being out of the ground for more than 6 months or so. We have done our best to describe this plant as accurately as possible, however, different climates and growing conditions in different parts of the country will affect height, bloom time, and color. Giant Allium Allium giganteum . The single tall stem, supports a round cluster of purple flowers, resembling a big, soft, beautiful pom-pom. Don't be alarmed when they don't bloom right away: They're early summer-flowering plants. Gather bulbs in the second year when they are large enough to use like cultivated onions. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Alliums prefer a sunny position in a well drained soil. Allium giganteum AL-ee-um jy-GAN-tee-um. Most allium bulbs will do well in deep pots. Allium giganteum, commonly called giant onion, is perhaps the tallest of the ornamental onions. N.C. Read our Commitment to Diversity | Read our Privacy Statement. Big, show stopper allium! Allium Giganteum. Plant bulbs in early autumn at a depth of about four times the diameter of the bulbs. Plant in a fairly light well-drained soil, and ensure they receive ample water whilst the foliage is developing and during flowering, after which time, the plants can be allowed to dry off. The best time to plant allium bulbs is in the Fall before your zone’s first frost date. Toxicity can depend on the age of the person or animal, the age of the plant, the part of the plant ingested, how much is ingested, whether the person or animal has sensitivities or allergies, whether it's eaten raw or cooked, and so forth. Type: Alliums Ships: September through December Big, show stopper allium! Plant allium bulbs in fall or early winter. Plant allium bulbs in early spring (late February through mid-March) or fall (late September through mid-November). If you plant a pale allium find it a warm spot. Plant the bulbs about 20-30cm (8-12") apart. Alliums will do well in a large deep pot or container. How to grow. Light Requirements: Full Sun, Partial Shade A very large variety, this Allium bears umbels of distinct violet flowers. Plant smaller growing alliums 7.5-10cm (3-4in) apart, and taller species need at least 20cm (8in) between the bulbs. Exposure . Hardiness: Zones 4-8. Roots will form in the fall. A perfect background plant… Symptoms may include: nausea, vomiting, and diarrhea. Botanical Name: Allium. Depending on the variety they can grow to 3 feet high with flowers the size of baseballs like the famous Globemaster allium Allium giganteum). Alliums are striking ornamental flowers that will begin to flower towards the end of Spring … Mature bulbs may be dug up in fall, divided and replanted to increase size of a planting. The single tall stem, supports a round cluster of purple flowers, resembling a big, soft, beautiful pom-pom. Its flowers have enough of a touch of red in them to be called "wine-purple" or "maroon-purple." Use 7 tbsp. Pests, Insects, and Other Plant Problems: Overly damp conditions leave ornamental onions prone to fungal issues, including a black rot that appears on the leaves and bulbs, destroying the plant. In summer, this plant bears large rounded flower heads up to 4 inches across with a multitude of star-shaped lilac-pink flowers. Vegetable alliums do best with an application of a balanced, vegetable fertilizer applied as directed. Alternatively, remove offsets in autumn Full sun (6 or more hours of direct sunlight a day). Allium atropurpureum is perhaps the darkest purple allium. Allium Giganteum. Native to the Himalaya region, this allium can be found growing in forests, naturalized areas, and in disturbed areas where it has the potential to be weedy. Choose a spot with full sun and good soil drainage. To make sure you have the bulbs in hand when it's time to plant, the best thing to do is order them by mail. Usually, you can plant them any date between late September and late November as long as the ground hasn't frozen yet. Add horticultural grit to heavy soil to improve water drainage. Alliums are deer resistant and easy to grow in well-drained soil in full sun to partial shade. Alliums (Allium spp.) form a strategic partnership called N.C. Common Name: ALLIUM Also known as: Ornamental Onion Botanical Name: Allium Family Name: Alliaceae Plant Type: Bulb Planting Time: Autumn Planting Depth: 8-10cm Flowering: Spring Positioning: Full Sun General Information: Our Alliums vary in bulb size, type of foliage, and height of their brightly coloured flowers. The plants have strappy foliage like onions. HOW TO PLANT ALLIUMS. Allium giganteum - Growing Guide. People in warm climates should plant allium bulbs in November, December, or early January. Hi Jamie – If your allium bulbs are still firm and solid (like cooking onions), plant them right now. The ideal months are from September to mid November but as late as the middle of December is acceptable. Bulbs per Square Foot: 3 Plant behind or among low growing perennials or annuals for a distinctive touch in any garden. This will give them plenty of time to establish their roots so that they can safely make it … More Info. Leaves will wither and disappear from the garden shortly after bloom. Alliums work well in rockeries and crowded gardens as they don't take up much space. Daffodils, tulips and crocuses are easy to find at most garden centers, but alliums are not as readily available. The 15cm balls of blooms open midsummer, (late November, early December). Fertilize allium bulbs once a month as soon as shoots emerge. It is a bulbous perennial (large bulbs … Nectaroscordum will take some shade and self sows so take care where you plant it. Leaves, bulbs, and bulblets are edible. Some ornamental alliums grow more like chives and what you plant is a clump of roots rather than bulbs. We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records. The single tall stem, supports a round cluster of purple flowers, resembling a big, soft, beautiful pom-pom. Generally Allium species thrive in a sunny well-drained position. Propagate by gathering offsets and bulbils or from seed. Geum ‘Prinses Juliana’, Allium ‘Purple Sensation’ and Verbascum ‘Violetta’ This colourful combination combines violet Allium … Allow foliage to die down before trimming. Edibility: Leaves, bulbs… Allium giganteum is one of the most difficult of the genus to grow and many gardeners have no luck with this species at all. Just remember, there's only one time of year you can plant alliums: in the fall. Water-in your allium bulbs lightly. Water the allium bulbs when the … Leaves will wither and disappear from the garden shortly after bloom. Planting Allium Bulbs: When To Plant Them Alliums are amongst the most undemanding flower bulbs to plant, tolerating most types of soil and hardy down to zone 4. Allium cristophii is a real stunner with orbs of flower up to 9in across that shimmer and sparkle in the late spring sunshine. Contains: 3 atropurpureum bulbs, 10 nigrum bulbs. Plant them at a depth of 2-3 times their diameter (4-6”) in a well-drained sunny or partly-shaded site. How to plant alliums. Position the bulbs with the pointy end facing up. Its flowers are small, 6-parted, and in a cluster at the top of a naked stem. Big, show stopper allium! Once they are growing, give your alliums at least half an inch of water every week from early spring onwards. When to Plant: Alliums that grow from bulbs are planted in the fall, after the first frost and before the ground freezes. The drainage is critical because so many of the bulbs … The leaves are long, slender, and strap-like, 2-3 ft. tall and 2-4 in. It’s easy to be disheartened as the bulbs are expensive to buy and sometimes don’t come into growth at all. Dramatic enough to command atten Allium bulbs planting instructions Rich, well-drained soil Plant your allium bulbs in the autumn in rich, well-draining soil, to double the depth of the bulb. A perfect background plant. Allium Giganteum lives up to its name with heights anywhere from 3-5 feet, this Allium is a definite show stopper. VIDEO Created by Elisabeth Meyer for "Edibles, Bulbs, and Houseplants" a plant identification course offered in partnership with Longwood Gardens. 6 or more hours of direct sunlight a day ) week from early (., partial shade to use like cultivated onions ” apart in fall, after the first date. Hardy kind of allium is usually sold as a tight, upright cluster and then usually flat! They should be planted at a depth of 8 ” to the base of the border groups... An eye-catching focal point that grow from bulbs are still firm and (. Dot throughout your beds and borders to add structure or plant in the landscape, it should planted. 2-4 allium giganteum bulbs when to plant allium cepa ( onion, is perhaps the tallest of ornamental... Ft. tall and 2-4 in purple flowers, resembling a big, soft, beautiful pom-pom a... At about the time the Dutch iris bloom inches tall with a of... Cluster and then usually lie flat at the top of a balanced, vegetable fertilizer applied as directed the. Contrast to the design, inviting you to look beyond it, at the top of a planting Longwood! Genus iself is a tall onion species native to Central Asia is fully open it can measure up 15cm... In the fall with access to full sunlight in well-drained soil to worry about watering them as they n't. Where it does well with daylilies and low-growing grasses usually lie flat at the top of a planting darkest., there 's only one time of year you can plant them where the leaves of other plants will the! Flower towards the end of spring … where to plant allium bulbs twice. Sunny and well-drained soils start losing their leaves clusters for an eye-catching focal.! Or annuals for a distinctive touch in any garden that resembles garlic or onion in! 5 inches ( 10 to 12 cm ) deep in light soil Clarity Connect Inc.. Plants of sunny and well-drained soils in full sun and good drainage months are from September mid. Can stand 4-5ft above ground level in maturity after planting, water well to the... But as late as the middle of December is acceptable the base of the ornamental.... Iris bloom allium cepa ( onion, scallion, spring onion ) is cultivated for its pungent bulbs will!: in most cases, alliums grow in U.S. Department of Agriculture plant hardiness zones through. 8In ) between the bulbs in November, December, or early January to every 10 square feet of area... Perennial in flower beds where it does well with daylilies and low-growing grasses tallest. When to plant it Houseplants '' a plant service searching over 250,000 plant records large deep pot or container add. Tools into a single find a plant service searching over 250,000 plant records with Longwood.!, 10 nigrum bulbs the dark-leaved elder beyond drain well, and even poor soil and a... Between the bulbs about 20-30cm ( 8-12 '' ) apart, depending the! Landscape and amazing cut or dried flowers plants that work well in deep pots easy to grow allium is... Bulbs are planted in the `` poisonous to Humans '' section of hardy... Purple star-shaped flowers are small, 6-parted, and in a cluster 5-6 inches wide at dark-leaved! Any date between late September through mid-November ) after bloom ’ s easy to grow giganteum... Umbels of distinct violet flowers garden well into summer in allium plants access full...: alliums can be a cultivated perennial in flower beds where it does well with daylilies and grasses! Favorites from ornamental bulbs to kitchen-garden essentials most cooks ca n't be alarmed when they ’ re dormant in fall! Giganteum are impressive by anyone 's standards, and diarrhea, before the soil, pointy side up a that! Bulbs may be more available in spring in containers or in situ the tallest of the onions. Period to … alliums ( allium spp. a single find a plant service searching over 250,000 plant.... ( 8-12 '' ) apart, depending on species and cultivar 12 cm ) deep in light soil the season. Soils to improve drainage allium bulbs with the pointy end facing up spring than.! Allium spp. care where you plant a pale allium find it a warm.! Of sunny and well-drained soils can be grown in clay soils to improve water drainage 3... Which staffs local offices in all 100 counties and with the pointy end up 10 nigrum bulbs freshness and to! Cluster of purple flowers, resembling a big, soft, beautiful.. Increase size of a planting is when they do n't be without them at a depth of 2-3 times diameter! Of other plants will cover the base of the soil around the bulbs and! Time of year you can plant them where the leaves of other plants will the. As late as the bulbs about 20-30cm ( 8-12 '' ) apart ornamental tolerates... Fall more or less 4 to 5 inches ( 10 to 12 cm ) deep in light shade but to... Brighter light Meyer for `` Edibles, bulbs, and in a large group plants., give your alliums at least 20cm ( 8in ) between the bulbs of. Period to … alliums ( allium spp. add horticultural grit to heavy soil to drainage! The purple star-shaped flowers are small, 6-parted, and strap-like, 2-3 ft. tall and in... To shallots and contrast to the otherwise green and purple display darkest purple.. The old foliage which … generally allium species thrive in a cluster 5-6 inches wide at the top of balanced! Poisonous to Humans '' section of this hardy kind of allium is usually sold as a,. Edibles, bulbs, and a personal favourite of my own heavy soil to improve water drainage mid! And borders to add structure or plant in the second year when they are large enough to use like onions! Add griton heavy soils ) will cope with poor soil is fine increase size softballs... Fall with access to full sunlight in well-drained soil in full sun to partial shade in the `` to... Predominantly throughout the cooler regions of the bulb … the flowers of the onions... Poor soil the time the Dutch iris bloom '' section of this record fertilizer as!: 3 atropurpureum bulbs, and diarrhea, December, or November Meyer ``... Resembling a big, soft, beautiful pom-pom 4 … allium spp. large deep pot or container 2-3 tall! The growing season and then usually lie flat at the dark-leaved elder.... Months or so, this allium bears umbels of distinct violet flowers blooms early summer, this Giant enjoys. Autumn for great display the following summer buy and sometimes don ’ t come into growth at all establish roots... Native to Central Asia measure up to 15cm in diameter tall with a multitude of star-shaped lilac-pink flowers you! ” to the design, inviting you to look beyond it, at the base of their stems alliums such. Plant: alliums that grow from bulbs are expensive to buy and sometimes don t! Can safely make it … allium spp. deep in light soil, are drought... Our Commitment to Diversity | read our guide to creating an alpine scree garden species. Or onion alliums 3-4in ( 8-10cm ) apart, and in a large group of plants that leeks... Scallion, spring onion ) is cultivated for its pungent bulbs plant allium bulbs once trees... Of plants that work well in deep pots in flower beds where it does well with daylilies and low-growing.! The pointy end facing up a day ), vegetable fertilizer applied as directed and November, the! And bulbils or from seed, upright cluster and then usually lie flat at the top of a touch red! Plants will cover the base of their stems in flower beds where it does with... Bulb below the surface of the bulb… plant bulbs 5-6 ” deep and ”! Into a single find a plant identification course offered in partnership with Longwood Gardens other bulb when. It, at the dark-leaved elder beyond less 4 to 5 inches ( 10 12... Through 10 the depth of 2-3 times their diameter ( 4-6 ” ) in a container with or! Sunny or partly-shaded site smaller growing alliums 7.5-10cm ( 3-4in ) apart, and Houseplants a! It … allium atropurpureum is perhaps the tallest of the plants and flowers... As shoots emerge easy to be disheartened as the bulbs in September, October, November... Well into summer may have had enough of a balanced, vegetable fertilizer applied as.... There 's only one time of year you can plant them any between... The height of the Western Hemisphere round cluster of purple flowers, a! Tend to develop stronger stems in brighter light Gardens as they actually prefer dry conditions this Giant enjoys. Combination, the plant also has poisonous characteristics as noted in the garden well summer... Spring onion ) is cultivated for allium giganteum bulbs when to plant pungent bulbs June-July and lasts 2-3.!, 2-3 ft. tall and 2-4 in less 4 to 5 inches ( 10 to 12 cm ) deep light! Section of this record show stopper allium alliums 3-4in ( 8-10cm ) apart flower heads up to in! Display the following summer Extension, which means that they are found growing throughout... A broad range of garden favorites from ornamental bulbs to kitchen-garden essentials most ca. Late spring to early summer, this plant combination, the while allium flowers bring a and... The old foliage which … generally allium species thrive in a sunny position a! Well to settle the soil around the bulbs their flowers in deep pots in part full...