Members of the onion family include alliums. The relationship becomes clear as soon as you cut a stem or break a leaf. These late spring and early summer flowers offer a stately yet carefree appearance in the garden.
Each floret in an allium flower head is grouped together. The flowers in this flower cluster might be white, yellow, pink, purple, or blue, and their overall shape can be rounded, oval, or cascading. Alliums come in a variety of heights, some measuring only 5 inches tall and others rising to a height of 4 feet. Every variety of allium gives the garden its own unique look and charm.
Start With a Better Bulb
A side-by-side comparison of two allium bulbs reveals obvious variances in quality. Larger bulbs (as seen in the image on the far left) have more food energy stored within them and will grow stronger plants with larger flowers. You can always enjoy the biggest, brightest blooms because Longfield Gardens offers top-quality allium bulbs.
Which allium species have flowers with brilliant colors?
A scape up to 40 cm tall and one bulb are both produced by Allium flavum. Bright yellow, bell-shaped flowers with a pleasant aroma can be found on the umbel. Flavum, the Latin word for the species, refers to the color of the blossom. It blooms in June and July and can withstand cold weather in USDA zones 4 to 8.
A flower from an allium what color?
Allium Azureum
One of our favorites, Azureum Allium, blooms in early summer with flowers that are a vivid cornflower blue color. Orbs on the flower measure 12 inches in diameter. The mid-vein of its star-shaped florets is a deeper blue color. The height of the plant is 1416 inches. With roses and vibrant yellow flowers, this Allium looks gorgeous. These blossoms appear in the early summer. 210 Hardiness Zones.
Sphaerocephalon Allium
That’s simple to grow Early in the summer, Allium produces egg-shaped flower heads with a burgundy top and a white bottom. It’s frequently known as the Drumstick Allium. It is the Allium’s most recent blossoming. When positioned in a perennial border, it looks fantastic. 38 Hardiness Zones
Mohican Allium Red
The unique Allium known as Red Mohican has burgundy blossoms with white tips. This unique-looking flower also has a pleasant scent. It blooms from late spring to early summer and reaches a height of 3640 inches. It will look fantastic in a bouquet or as a dried flower. Bees and butterflies are drawn to it. 49th hardiness zone.
There are several fragrant dark burgundy flowers on Allium atropurpureum plants. The robust, 2030-inch stems have 2-inch flower heads on top of them. A late spring flower, this. As a cut flower, this bloom keeps well in vases. 49th hardiness zone.
The baseball-sized flower clusters of the Pink Jewel Allium have warm pink petals and green eyes. The 3 to 4 inch globe-shaped flowers have a 3-week blooming period from May to June. They are resistant to rabbit, deer, and rat damage and draw bees, butterflies, and other beneficial pollinators. 26 to 34 inches is the height range for Pink Jewel Allium. zones of hardiness 3–8.
The tallest flowering allium, Pink Giganteum Allium, with ball-shaped flowers that have a diameter of 4-6 inches. Your spring garden will look stunning with this Giant Allium blossom. These enormous flowers look fantastic when placed with shorter plants and have lovely pink blooms. These bulbs’ late spring blooms, which persist for three weeks, will occur. zones of hardiness 3–8.
A. Oreophilum Allium
Beautiful magenta blossoms cover the allium in a loose flower crown. You can grow the unusual color of Alliums on the ground or in containers. This Allium variation, which is shorter than most of them, looks great as a border or in a perennial garden. The late spring and early summer blooming flowers pair well with poppies, peonies, and tulips. The height of the plant is 1218 inches. 410 Hardiness Zones.
Allium Nevskianum
Flowers on this uncommon pink Allium can be up to 5 to 6 inches wide. The low-growing, dandelion-like plant has broad, thick leaves that are coated in a waxy bluish-gray substance. The plant reaches a 45-inch height. Excellent for borders, Nevskianum Allium would look stunning in a rock garden. The flowering season lasts from May through June. In Hardiness Zone 48, it appears fantastic.
Allium Mountain Everest
This pure white flower is four inches tall and has lovely flowers. They complement conventional Gladiator or Purple Sensation Allium flowers beautifully when grown together. Mount Everest will reach a height of 2436 inches and smells good. In a bouquet, the snow-white flowers appear stunning. Late spring to early summer is when this cultivar will bloom. 49th hardiness zone.
Graceful Allium – Graceful Allium has globe-shaped blooms that are covered in multitudes of tiny white blossoms with lavender filaments. Alliums are fantastic landscape ornaments and create stunning dried or cut flowers. These perennial plants are excellent for fresh or dried bouquets and can be grown in containers. They are simple to grow and resistant to deer and rabbits. Late spring to early summer will bring the graceful allium’s bloom. zones of hardiness 4–10.
Cowanii Allium – Cowanii Allium blooms in late spring or early summer with clusters of pure white flowers. These lovely Alliums make wonderful cut flowers. The flowers’ wiry branches make them ideal for pollinators. These plants tolerate poor soil and are undemanding, just as other Allium kinds. Allium “Neapolitanum” is another name for this Allium. Zones of hardiness 39.
Iron Allium
This flower has vivid yellow blossoms. Allium Moly is often referred to as Lily Leek or Golden Garlic. The flowers have the appearance of brilliant stars that may light up any garden. On top of stems that measure 1015 inches in length, the flowers develop in 23-inch clusters. The plant begins to bloom in May, and the blooms persist until the end of the summer. Zones of hardiness 39.
how do you dry alliums?
Pick off seedheads that are starting to fade and store them for a few months in a cold, dry place, such a shed or cellar. To use as Christmas decorations, I like to dry my seedheads and then spray-paint them silver.
are alliums edible?
Since they are all members of the allium family, onions, leeks, and garlic are often consumed foods. Alliums are theoretically edible, but beware eating any that are designed to be aesthetic garden plants because they may have been chemically treated.
are alliums good for bees?
In the spring, bees and other pollinators are all over our alliums. Our neighborhood beekeeper also claims that the honey doesn’t taste oniony.
do alliums need staking?
Even the tallest alliums won’t need staking since their sturdy stems can hold them if they are planted deeply enough in full sun (so they don’t extend toward the light) and in a sheltered location (so they don’t blow over in the wind).
Which allium is best?
It seems sense that ornamental alliums are becoming more and more popular. The three most important criteria for gardeners across the nation are readily satisfied by these lovely plants: drought tolerance, deer resistance, and pollinator appeal.
The small list of plants that deer and insect pests tend to avoid includes alliums. The plants appear to be odorless, but when stepped on or chewed, their cell walls rupture, releasing volatile chemical compounds with a sulfur basis that have a strong sulfury stench and a bitter taste. Alliums are nearly indestructible as a result. While the blooms’ sweet nectar is very alluring to honeybees, bumblebees, and other pollinators, the leaves is repulsive.
Many garden alliums are indigenous to Central Asian mountainous areas, where the soil is thin and porous, the climate is hot in the summer and freezing in the winter. They can tolerate or even prefer dry growing circumstances as a result, which makes them great candidates for today’s water-conscious landscaping. They go well with ornamental grasses and other low-care perennials like salvia, sedum, rudbeckia, and echinacea.
ALLIUM BULBS PLANT IN THE FALL The majority of alliums grow from bulbs, much like their culinary relatives shallots and garlic. They bloom from late spring to early summer after being planted in the fall.
The best alliums are also the most impressive, including the large-headed varieties “Gladiator” and “Globemaster,” as well as the frequently planted A. aflatunense “Purple Sensation,” which blooms first. Its raspberry-purple, 3-inch-diameter flower heads, which are supported by 24- to 30-inch stalks and persist for up to two weeks, produce superb cut flowers.
Globemaster, His Excellency, and “Gladiator” bloom right after “Purple Sensation.” These alliums stand out with blooms that are five to ten inches across on three to four foot stems. Long after the color has faded, their big seed heads remain appealing.
Other alliums planted in the fall also need to be included. Pure white, five-inch blossoms on the elegant “Mount Everest” plant. It’s a need for any garden that is entirely white, together with the misleadingly termed black onion (A. nigrum). The tumbleweed onion (A. schubertii), which has flower heads that appear to have been captured mid-explosion, may be the most peculiar-looking allium. Maroon A. atropurpureum, star of Persia (A. christophii), and two-tone drumstick allium are three equally attractive species (A. sphaerocephalon).
ALLIUMS CLUMPING The most striking flowers are produced by ornamental alliums that grow from bulbs, but small-headed alliums still have a certain allure. These plants have thick clumps of roots that they emerge from, and their foliage is always lush and green. These non-bulb alliums begin to bloom in the early summer and, depending on the species, can continue all the way through October.
A hybrid of A. nutans, or Siberian chives, called “Millenium” is one of the best allliums that grows in clumps. On stiff, fifteen-inch stems that protrude above a neat clump of foliage, the purple, two-inch spherical flowers open in the middle of July. The long-lasting flowers are perfect for trimming. Other summer bloomers include the lavender-pink ‘Summer Beauty’ and the light pink ‘Sugar Melt’.
Look to A. tuberosum for a late summer star. This edible plant is often known as garlic chives in herb gardens, but its pure white blossoms on 20-inch stems make it an excellent choice for the flower border. The final allium of the year, Allium thunbergii ‘Ozawa, has orchid-pink blossoms that are a significant source of nectar for pollinators who are still out foraging in the late fall.
PLANTING ALLIUMS Most alliums may be grown in USDA Hardiness Zones 3 to 9, and they are robust, cold-tolerant plants. They generally don’t care much about the soil, though the ones with big bulbs need adequate drainage. They are also hardly ever bothered by rodents or deer, and they are virtually impervious to disease and bug concerns.
Alliums for decoration that come from bulbs should be planted in the fall. They look best planted in clusters, just like other flower bulbs planted in the fall. You should plant more bulbs in each group the smaller the bulb is. However, as their foliage will wither a few weeks after flowering, the bulbs can be planted practically anyplace. In order to assist cover the withering leaves, it is actually ideal to have adjacent plants.
Anytime during the growing season is suitable for planting the clump-forming alliums. They make wonderful pass-along plants because they are simple to divide and don’t hate being transferred. By removing the flower stalks after they have finished blooming, you can maintain these plants looking neat and reduce self-sowing.
At her Vermont home, Kathleen LaLibert writes and tends to her gardens. The National Garden Bureau is providing this material as a service. Image of the millennium courtesy of Walters Gardens.
What color are all alliums?
The Allium genus includes allium blooms, which are commonly referred to as flowering onions or decorative onions. Alliums include edible herbs like chives, garlic, shallots, onions, and leeks as well as decorative blooms. The distinctive feature of allium flowers is their blossoming blossoms, which develop atop long, slender stalks in compact spheres called as umbels. Pink, lilac, blue, and white are just a few of the colors that these globular flower clusters can bloom in. Their colorful blooms add color and vibrancy to any garden design, and the tall, thin stems of these plants make for stunning cut flowers.
When should I plant the bulbs of allium?
Most likely, when you think of alliums, you picture those plants with the traditional round, purple flowerheads on long stalks that make borders look amazing in late spring and early summer. Alliums, however, are much more than this.
There are alliums that are white, pink, blue, and yellow. There are some alliums that resemble a fireworks display, and others that resemble knotted dreadlocks.
You can identify that alliums are related to onions, garlic, and leeks by the aroma released when you crush the foliage. This family also includes chives (Allium schoenoprasum), which have delicious leaves that may be sliced and used to salads and dips.
Alliums are a favorite of butterflies and bees, and even the dried flowerheads look lovely in the border or in floral arrangements.
When to plant allium bulbs
The greatest time to plant alliums is in mid- to late-autumn, at the same time as tulips and daffodils that bloom in the spring. Allium bulbs are resilient and can withstand harsh winter weather if they are planted in soil that drains effectively.
Some attractive alliums, like “Allium sphaerocephalon,” flower in the late summer. Most ornamental alliums bloom in the late spring and early summer.
Where to plant alliums
The majority of alliums thrive in full sun and well-drained soil. Tall alliums should be planted in a protected area to prevent the stems from blowing over in high winds. Plant purple-flowered chives (‘Allium schoenoprasum’), which appreciate afternoon shade, or yellow-flowered ‘Allium moly’ in shaded areas.
Tall alliums look great planted in broad swaths or punctuated across a border. Late-summer bloomer Allium sphaerocephalon has gorgeous wine-red flowers that stand out amid the grasses in prairie planting schemes.
Long, slender leaves on ornamental alliums fade back as the flowers emerge. To conceal the waning foliage, place allium bulbs under other low-growing plants.
Planting allium bulbs
- Remove any weeds by turning the dirt over. Dig in leaf mold or compost instead of using manure on heavy soil as this can change the soil’s pH level. Alliums thrive in soil with a pH that is neutral.
- Make a hole that is roughly four times the bulb’s depth.
- Put a bulb in the opening with the roots pointing down.
- Gently compact the earth after filling the hole.
Alliums can also be grown in large pots with soil that is a mixture of grit, John Innes No. 3 compost, and multipurpose compost.
Tips on caring for alliums
- Ground-planted alliums typically don’t require irrigation.
- In the spring, alliums grown in containers will require regular watering. However, avoid letting the compost become soggy as this could lead to the bulbs rotting.
- Crushed eggshells around plants, copper tape around pots, beer traps, or wildlife-friendly slug pellets can all be used to deter slugs and snails from eating new spring leaves.
- When the plants are in bloom, spread a general-purpose fertilizer to aid in the development of the bulbs, assuring healthy flowers the following year.
- Once the leaves have withered back, remove them.
- There is no need to deadhead the flowerheads unless you choose to because they still look excellent after flowering has completed. As long as they remain in place at the border, they may be ignored.
- Put pots in a greenhouse or up against a wall of a house in the winter to shield them from the cold weather.
Growing allium bulbs from offsets
Offsets, which are little bulbs affixed to the main bulb, are produced by many allium bulbs. These can either be planted directly in the ground or split from the main bulb and placed in tiny pots to grow on. Before they have developed enough to produce flowers, it will take a number of years.
Wait until the allium plants are through flowering before using a garden fork to carefully uproot the plants and inspect the bulbs for offsets. Replant the bulbs after removing any offsets.
Best allium bulbs to plant
Alliums come in a wide variety, from large to little, with flowerheads that are rounded or exotic-looking twisted. Here is a selection of the most well-liked alliums.
- One of the most well-known alliums, Allium ‘Purple Sensation’ has the traditional deep purple spherical flowerheads on long, robust stalks. 1 m (3.5 ft) high.
- Large circular purple flowerheads up to 15 cm (6 in) across on robust stems that are 80 cm (3 ft) tall characterize Allium ‘Globemaster’.
- As its name suggests, Allium giganteum is a true giant with dense, spherical purple flowerheads on stems up to 1.8 meters (6 feet) tall.