Silver Spring Allium Allium 'Silver Spring'

👤 Non-toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Edible
‍🌱 Easy-care
allium 'Silver Spring'


The Allium 'Silver Spring' is a striking ornamental onion that produces gorgeous flower heads. They are comprised of clusters of star-shaped white blooms, which are accentuated by a contrasting deep purple or dark red center. These blossoms form a spherical shape which gives a burst of color and eye-catching appeal. The stems are sturdy and upright, holding the flower heads high above the foliage. The plant's leaves are typically long and strap-shaped, exhibiting a lush green color that adds to the overall visual interest of Allium 'Silver Spring'. The combination of the vibrant blooms and the green foliage creates a refreshing and appealing look in any garden setting. The beauty of the white flowers is highlighted when they catch the sunlight, making them shimmer and giving an illustrious appearance to the bloom.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Silver Spring Allium, Ornamental Onion

    • Common names

      Allium 'Silver Spring'.

  • skullToxicity

    • To humans

      Allium 'Silver Spring', commonly known as ornamental onion, is generally not considered toxic to humans. If ingested in normal food quantities, it is safe. However, like other members of the Allium family, consuming large amounts may cause gastrointestinal discomfort, including nausea, vomiting, and diarrhea because of the various sulfur compounds they contain. People with a sensitivity to these compounds or who consume unusually large quantities might experience more pronounced symptoms.

    • To pets

      Allium 'Silver Spring', known as ornamental onion, is toxic to pets like cats and dogs. Ingesting any part of the plant can cause symptoms such as vomiting, diarrhea, abdominal pain, and lethargy. Severe cases can lead to more serious conditions like oxidative damage to red blood cells, which may result in hemolytic anemia. This can manifest as pale gums, rapid breathing, and ataxia. If you suspect your pet has ingested any part of an ornamental onion, it is important to seek veterinary care immediately.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      3 feet (91 cm)

    • Spread

      1 foot (30 cm)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Attractive Flowers: The Allium 'Silver Spring' produces eye-catching inflorescences of white flowers that add aesthetic appeal to gardens and landscapes.
    • Pollinator Friendly: This plant attracts bees, butterflies, and other pollinating insects, which are beneficial for promoting biodiversity and assisting in the pollination of nearby plants.
    • Low Maintenance: It is generally easy to care for, requiring minimal upkeep once established, which makes it a convenient choice for busy gardeners or those who prefer low-maintenance gardening.
    • Deer and Rodent Resistant: The plant has a natural resistance to deer and rodents, protecting it from grazing and damage caused by these animals.
    • Drought Tolerant: Once established, it has good drought resistance, making it suitable for xeriscaping or gardens in arid climates where water conservation is important.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Photography Prop: Allium 'Silver Spring' can be used as an aesthetic prop for garden photography due to its striking blossoms and structural interest.
    • Dye Source: The plant can be used to create natural dyes for textiles or artisanal crafts, with different parts of the plant offering varying shades.
    • Companion Planting: It can help deter pests in the garden when planted among vegetables, thus serving as a natural pest-control agent.
    • Floral Arrangements: The blooms can be cut and used in both fresh and dried flower arrangements, adding height and interest.
    • Education: Allium 'Silver Spring' serves as an educational specimen for horticulture students learning about bulbous plants and propagation.
    • Gastronomy: While not as common as other alliums, the flowers may be used as an edible decoration for gourmet dishes in high-end culinary presentations.
    • Culinary Experiments: Some adventurous cooks might use the mild onion-flavored flowers as a unique ingredient in experimental cooking.
    • Art Inspiration: The intricate flower heads provide inspiration for artists and can be featured in botanical drawings and paintings.
    • Wildlife Habitat: The plant provides food for pollinators, such as bees and butterflies, which is essential for maintaining local ecosystems.
    • Perfumery: While not a traditional source for scents, traces of the plant's fragrance could potentially be distilled for use in handmade perfumes

Interesting Facts

  • bedFeng Shui

    The plant Allium 'Silver Spring', commonly known as ornamental onion, is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The ornamental onion is not used in astrology practice.

  • spiralPlant Symbolism

    • Unity: Alliums, with their spherical clusters of flowers, symbolize unity and togetherness, reflecting how each individual floret is part of a larger, harmonious whole.
    • Patience: As a plant that takes time to bloom and achieve its full spherical shape, Allium 'Silver Spring' represents patience and the reward of waiting for something beautiful to unfold.
    • Prosperity and good fortune: Often considered a lucky plant, alliums like 'Silver Spring' are believed to bring prosperity and good luck, making them popular in gardens and as gifts.
    • Strength and resilience: Alliums are hardy plants that can withstand tough conditions. Their ability to come back year after year symbolizes strength and personal resilience.
    • Protection: Historically, alliums have been used to ward off evil spirits or negative energies, so they symbolize protection against harm.

Every 1-2 weeks
2500 - 10000 Lux
Every 2-3 years
Spring-Early Summer
Not needed
  • water dropWater

    Ornamental onions 'Silver Spring' should be watered generously once the soil has had a chance to dry out slightly at the surface—typically once a week during the growing season. It is best to use deep watering methods, allowing the water to seep down to the roots rather than just wetting the surface. The exact amount of water depends on the weather and soil conditions, but a good rule of thumb is to provide about one gallon of water for each plant during each watering session, ensuring that the moisture reaches at least a few inches into the soil. In the dormant season, reduce watering to prevent rot, especially if the soil stays moist for longer periods.

  • sunLight

    Ornamental onions 'Silver Spring' thrive in full sun conditions where they can receive at least six hours of direct sunlight daily. They perform best in a spot that has clear exposure to the sun from above, without significant shading from trees or other large plants. If you live in an especially hot climate, they can tolerate some light shade, but the flowers are most prolific when given ample sunlight.

  • thermometerTemperature

    Ornamental onions 'Silver Spring' prefer temperate climates and are hardy in a range of temperatures. They can survive winter temperatures down to about -4 degrees Fahrenheit and are comfortable in the heat as long as they are not subjected to extreme and prolonged temperatures above 86 degrees Fahrenheit. Ideally, these plants favor conditions where the average temperature is between 60 to 70 degrees Fahrenheit.

  • scissorsPruning

    Ornamental onions 'Silver Spring' benefit from deadheading once the blooms fade to encourage more flowers and prevent self-seeding. You should prune the foliage only after it has died back naturally, typically in late summer or early fall; this allows the plant to store energy in its bulb for the next growing season. There's no set schedule for pruning since it's based on the plant’s life cycle, but cleaning up spent flowers and withered leaves annually is usually sufficient.

  • broomCleaning

    As needed

  • bambooSoil

    The 'Silver Spring' Flowering Onion thrives in well-draining, fertile soil with a pH of 6.6 to 7.5. A mix of loam, sand, and compost is ideal for this plant, ensuring good drainage and nutrient retention needed for optimal growth.

  • plantRepotting

    'Silver Spring' Flowering Onion, being a perennial bulb, does not require frequent repotting; it's generally best to repot every 3-4 years to refresh the soil and divide the bulbs if necessary.

  • water dropsHumidity & Misting

    'Silver Spring' Flowering Onion prefers average garden humidity levels and does not require any special humidity adjustments for optimal growth.

  • pinSuitable locations

    • Indoor

      Ensure bright light and good ventilation for indoor 'Silver Spring' Flowering Onion.

    • Outdoor

      Plant in well-drained soil, full sun, and water moderately for outdoor 'Silver Spring' Flowering Onion.

    • Hardiness zone

      4-9 USDA

  • circleLife cycle

    Allium 'Silver Spring', commonly known as Silver Spring Allium, typically begins its life cycle with the germination of seeds or growth from bulbs in late winter to early spring. After germination or bulb sprouting, the plant develops roots and shoots, followed by foliage growth, displaying long green leaves. As spring progresses into early summer, the plant enters its flowering stage, producing tall stalks topped with large, spherical clusters of flowers that can attract pollinators such as bees and butterflies. After the flowering period, the plant sets seeds, which mature by late summer or early fall, completing the reproductive cycle. Post-flowering, the foliage of the Allium 'Silver Spring' will gradually yellow and wither, with the plant entering a period of dormancy during the colder months. During dormancy, the bulb remains underground, storing energy for the next growing season where the cycle begins anew.

  • sproutPropogation

    • Propogation time

      Spring-Early Summer

    • Propogation: The Allium 'Silver Spring', commonly known as ornamental onion, is typically propagated through division, which is best done in the fall after the leaves have withered. To propagate by division, carefully dig up the clump of bulbs and gently separate them, ensuring that each section has at least one or two bulbs attached. Replant the bulbs immediately at a depth of about three times their diameter (roughly 2 to 4 inches or 5 to 10 centimeters deep) in well-draining soil and spaced approximately 8 to 12 inches (20 to 30 centimeters) apart. This method allows for each bulb to develop into a new, independent plant, and with optimal growing conditions, these new plants will mature and potentially flower by the next season. Division not only helps to increase the number of plants but also invigorates older clumps that may have become too dense, ensuring the continued health and vigor of Allium 'Silver Spring' in the garden.