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.
Identification by Leaf Type
It is Allium tuberosum if the flat, crown-originating leaves are present (garlic chives).
It is Allium schoenoprasum if the leaves have a hollow center, are spherical, and grow from the plant’s crown (chives).
Allium sativum is the plant if the stem is clearly visible and the leaves grow from the stem (garlic).
Identification by Flowers
It is Allium tuberosum if the flowers are white and bloom in the late summer at a height of two feet or more (garlic chives). The many flowers are distinct from one another and are plainly discernible.
It is Allium schoenoprasum if the flowers are mauve and bloom in late spring or early summer (chives). In order to prevent individual flowers from standing out from one another, it typically flowers at a height of 1 to 1.5 feet.
At a height of four feet, the flower head is Allium sativum if it produces little bulbs instead of flowers (garlic).
Note 1: Allium schoenoprasum (chives), which often have mauve flowers, can also produce white blooms. There is also a small version of this plant, which blooms at a height of less than one foot.
Note 2: Flowering height is not a reliable technique to identify a plant because it depends on the soil and temperature.
Could you remove the allium leaves?
Allium requires very little maintenance because it is a perennial bulb plant with simple requirements.
They will produce lovely flowers on the ground or in pots without your assistance.
- As the flower scapes wilt, trim them off, keeping the stem as brief as you can.
- Only remove leaves that have already begun to turn yellow since the bulb is stockpiling nutrients for the upcoming blooming cycle at that point.
- No fertilizer is required.
In order to conceal the wilted leaves and expose only the flower stalk, it is helpful to grow ground-covering perennials around the gigantic onion plants. Allium leaves have a tendency to turn yellow before or after the blooming of the large umbels.
Allium that is grown in containers should be watered frequently since they require more water because they dry out more quickly.
A chive is it an allium?
The chive, or Allium schoenoprasum, is a little perennial plant belonging to the Amaryllidaceae family, which is related to the onion. Because of their lovely blossoms and flavorful leaves, chives are planted as ornamentals. The leaves are frequently used as a flavoring for eggs, soups, salads, and vegetables and can be used fresh or dried.
Chives produce bunches of thin, tubular leaves and tiny, white, elongated bulbs. Above the foliage, dense spherical umbels of bluish or lilac flowers appear. They often only yield a small number of seeds. Although seeds can be used to grow chives, it is more typical to divide clumps and plant the tiny bulbs.
Spread alliums?
Spread alliums? Yes, the plant’s bulbs and seeds will grow and spread without much help from you. Typically, they will disperse at their own rate and stay put until they are moved or split.
How long are allium bulbs good for?
Post-bloom maintenance for alliums is quite simple. Simply continue to water the plants sparingly until they start to shrivel and turn yellow. At this point, you have the option of either dividing the plants or cutting them all the way to the ground.
Divide allium bulbs every three to four years. Simply use a shovel to dig around the plant and lift the bulbs out. You should see a group of bulbs that you may gently separate with your hands. Replant a few in the same location, and immediately transplant the others to different sites.
It’s considerably simpler to take care of allium bulbs that you don’t wish to divide. When the foliage starts to fade, simply trim it back, and in the fall, mulch the soil with 2 to 3 inches (5-7.5 cm) of material. In the spring, remove the mulch to allow room for fresh growth.
When do alliums bloom each year?
- Size and color of flowers Alliums come in a variety of colors, including blue, purple, mauve, pink, yellow, and white, and have flower heads that range in size from a few millimeters to 18-20cm (7-8in) in diameter.
- Height Allium stipitatum “Mount Everest,” which may grow to over 90 cm (3 feet) in height, and other tall alliums give your garden an architectural feel. They can be planted in the centre of a border so that they tower over their shorter neighbors. Smaller-flowered alliums, like Allium cristophii, can be planted in groups closer to the front of the border or in the rock garden.
- blooming period In May and June, most flowers bloom. Try Allium sphaerocephalon for color in July and August if you want later blossoms.
- In your garden, take into account how you would like your alliums to complement or contrast with other early-flowering perennials. Alliums can be placed next to yellow or orange euphorbia or orange flowering geums for a striking impression. For a gentler appearance, try mixing them with plants that have grey foliage, such artemisia.
- Allium insumbicum, a specialty allium, is best cultivated in containers or the rock garden so you can more readily provide them with the care they require.
- One of the smaller alliums better adapted to woodland environments, such as Allium moly ‘Jeannine,’ could be grown in colder, moister conditions.
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).
How can allium foliage be masked?
When I saw several friends who were visiting staring carefully at some plantings in the far corner of my decorative garden, I knew I had struck gold in terms of landscaping. When I approached to join in on their chat, I noticed that they were focused on a group of deep purple irises that were surrounded by tall, silvery purple alliums. The composition’s different purple tones were nicely and harmoniously contrasted by the golden foliage of the neighboring shrubs. It wasn’t the irises or the shrubs, while both were extremely gorgeous in their own right, that attracted so many remarks from my friends. The alliums were the object of their attention!
Alliums, commonly referred to as attractive onions, weren’t always common in the landscape. However, gardeners are starting to take notice of them as they enjoy their beauty and see how they offer an architectural contrast to other decorative plants’ spreading or mounding forms. It’s exciting to notice these adorable bulbs popping out all over landscapes.
The broad botanical genus that comprises chives, shallots, leeks, onions, and garlic also contains ornamental onions. However, in contrast to their edible siblings, decorative cultivars are only developed for their eye-catching, spherical flower heads. The flower heads are composed of clusters of tiny, star-shaped flowers, and they are 1 to 10 inches wide. Some of the larger types’ flower heads may have 100 or more distinct flowers inside. The flowers might be white, yellow, blue, silvery lavender, or reddish purple, depending on the selection.
Most ornamental onion cultivars have flower heads that are elevated above a group of strap-like leaves. Early bloomers have unusually early spring foliage emergence, which typically dies back just as the plants begin to blossom. Alliums that bloom later in the season keep their lovely green foliage for a longer period of time. It is a good idea to place the early bloomers in the landscape so that the nearby vegetation will cover the wilting leaves.
Alliums draw bees and butterflies to the ornamental garden in addition to adding beauty and architectural interest. If you still need more encouragement to try alliums, there is some more good news. They are avoided by deer, rabbits, voles, squirrels, chipmunks, and other animals due to the leaf and bulbs’ slight onion flavor.
More than 300 species of the allium family are used as ornaments. The size of the bulbs varies greatly, usually in relation to the height of the plant as a whole. While some of the taller allium varieties reach a height of over 4 feet, several of the lower varieties only reach a height of 6 inches. The majority of cultivars reach a height of 18 inches or more and are suitable for the middle or back of the border.
The following are a few of the more well-liked allium species and hybrids that are planted in American gardens:
- Purple Sensation A. aflatunense Even though I enjoy many varieties of ornamental onions, this one is a personal favorite. In the middle of April, 2- to 3-foot-tall stems bear violet-purple flower heads that are 4 to 5 inches broad. The terrain is given depth and drama by the intense hue.
- Caeruleum, A.
- On 2-ft-tall stems, the modest 1- to 2-in. flower heads are a lovely shade of sky blue.
- A. christophii, often known as the Star of Persia, is an allium species with one of the largest flower heads. Hundreds of star-shaped florets are arranged in a loose, airy 10- to 12-in. broad pattern on a typical flower head.
- 1. The Giganteum
- This is one among the tallest representatives of the Allium genus, reaching a height of at least 4 feet. The persistent flower heads are typically 4 inches across.
- A. “Globemaster”On 3-foot-tall stalks, softball-sized flower heads of a silvery purple color bloom in May. Visitors to my garden were mesmerized by this variety.
- ‘Jeannine’ A. moly
- This smaller species blooms in the middle of the summer on 12-inch stalks and has beautiful yellow flowers.
- Schubertii A.
- This is undoubtedly one of the allium family’s more unusual members. The flower heads are colorful and extremely huge. It is described as a lavender fireworks display in other publications.
- Sphaerocephalon, A.
- Frequently called drumstick allium,
Around June, this later-blooming cultivar bears reddish-purple, egg-shaped flowers that are 1 to 2 inches diameter. Large clusters of this selection look the best when planted. In the summer, especially, it can withstand a little bit more dampness than its brothers.
- ‘Mount Everest’ A. stipitatum This variety, one of many white-blooming species, bears 6- to 8-inch snow-white blooms with dark green eyes on stems that to 3 feet tall.
- In a rock garden or at the front of a mixed border, plant the smaller, low-growing kinds. To add texture and height to the border, use medium-height variety. In mixed borders, the taller species and hybrids offer eye-catching vertical components. Although they can reach heights of 3 to 4 feet, unless the location is extremely windy, they don’t need to be staked.
- Use as a link between bulbs that bloom in the early spring and those that bloom in the summer.
- Plant them to draw hummingbirds, butterflies, and bees.
- Combine with vegetation to help disguise the dying back of the allium leaves. Some suggested mates include catmint, peonies, irises, and roses.
- From the lightest lavender to the deepest purples, combine with different hues. For instance, place the reddish-purple Salvia nemorosa ‘Caradonna’ selection beside the basic purple A. aflatunense ‘Purple Sensation’ selection. Plant “Giganteum” with a deep purple kind of iris like “Swingtown.” Plant burgundy drumstick allium close to the contrasting hues of golden Coreopsis for a more vivid color combo.
- For a traditional color scheme, combine the purple species with plants that have silver or gold foliage, such as Agastache foeniculum ‘Golden Jubilee’ or Artemisia or Stachys.
- For a refined and beautiful combination, use plants with variegated green and white foliage or white varieties with pale pink roses.
- To keep the spectacle continuing, space out the blooming times. For instance, ‘Purple Sensation’ blooms in May among the first, followed by A. giganteum. Early summer is when drumstick allium takes over, and late summer to early fall is when pink-blooming A. thunbergii ‘Ozawa’ blossoms. An indigenous variety called A. stellatum (American prairie onion) flowers from late summer to early fall.
- Keep the seed heads in situ after the flowers have faded to keep the garden interesting for the remainder of the summer.
- Use the dried flower heads for Christmas decorations or floral arrangements.
- To improve the show, let alliums to gradually colonize the area. While certain types invade more well than others, the species that are frequently sold are not regarded as invasive.
Although ornamental alliums are fairly simple to grow, they do have certain unique needs.
- Autumn is the best time to plant the bulbs. Alliums need a period of cold weather in order to bloom, much like the majority of spring-flowering bulbs need.
- The majority of alliums are native to sandy, arid soils, but they will thrive in clay if it has been improved with drainage. It’s crucial to have good drainage in the winter. The majority of alliums prefer dry soil and cannot withstand moist soil.
- LightAlliums can take some shade, but they thrive in direct sunlight. Make sure no other plants are casting any shade over their foliage.
- Plant DepthPlant alliums 3–4 times their bulb’s diameter deep. Bulb planting too shallowly may lead to poor flowering.
- Plant Distance
- Smaller allium species should be spaced 3 to 4 inches apart. Depending on the species, leave a gap of 8 to 12 inches between large species.
- The strap-like leaf may being damaged by frost as it develops in the spring. The bulb will still bloom despite it, but the plant’s look could be harmed by the damaged foliage. Late spring or early summer is when the foliage of species that bloom in the spring dies back.
Alliums can develop colonies or self-seed if they are content in a sunny, well-drained location. The growth of flowers may be hampered by crowding. The bad news is that. The good news is that you can now expand your allium collection for your garden or to give to friends. There are various ways to spread alliums:
- Division Allium bulbs frequently grow offsets. Lift overcrowded alliums out of the ground to divide them once the flowers have faded and the foliage has perished. Remove the offsets slowly from the “mummy bulb Replenish both of the “the offsets and the mother bulb.
- Aerial bulbils are produced in the flower head of a select few alliums, including A. roseum and A. sphaerocephalon. They can be painstakingly removed from the flower head and planted in compost that drains easily. Add a thin layer of compost over top of them, about 1/4 inch thick.
- Alliums can also be established from seeds, although the plants that result from this process take several years to attain flowering size. Plant seeds as soon as they are mature, or keep them in the refrigerator until spring and plant them when the soil reaches a temperature of at least 55 degrees. Within 12 weeks, the seeds should begin to grow. Keep in mind that hybrid seeds won’t produce fruit. A word of warning: Some species’ seeds might be harmful. Please do not give these to your pets or kids to eat.
Ordinarily trouble-free, ornamental onions are nevertheless susceptible to the same pests and illnesses as their culinary relatives. They might experience onion bugs, downy mildew, and onion white rot. Slugs, snails, and the allium leaf miner are among the pests.
The Definitive Horticultural Reference for the 21st Century: A-Z Encyclopedia of Garden Plants (The American Horticultural Society, rev. ed. 2004).