Schubert’s ornamental onion (Allium schubertii)

Name: Schubert’s ornamental onion ( Allium schubertii )
Brand: Van Noort
SKU: VAN-146-190-01
Price: 8.99 CAD
Availability: OutOfStock

Sale Sold out

Ail ornemental Schubert ( Allium schubertii ) : une grande inflorescence d’allium aux longs rayons terminés par des fleurs roses. Le visuel Florissa présente la plante et son nom dans la partie inférieure de l’étiquette. La photographie occupe presque toute la surface, tandis que le bandeau du bas rassemble les indications du produit. Cette vue permet de reconnaître son apparence et de distinguer la variété présentée.

Ornamental bulb Amaryllidaceae

Ornamental onion with an enormous firework flower

Van Noort

Common nameSchubert’s ornamental onion

FamilyAmaryllidaceae

GenusAllium

Speciesschubertii

CultivarSchubertii

Bulb typeOrnamental bulb

Botanical nameAllium schubertii

Quantity per pack2 bulbs

Schubert’s ornamental onion (Allium schubertii) unfolds a spectacular umbel approximately 30 cm (12 in) wide on a plant only 40 cm (16 in) tall. Pinkish-purple star-shaped flowers sit on flower stalks of dramatically different lengths, creating a true three-dimensional explosion. The head appears almost as broad as the plant is tall and floats above a rosette of wide green leaves. In late spring, this architecture turns a border or rock garden into a sculptural scene. Hardy in Zones 5 to 9, this Mediterranean species mainly requires warmth, sun, and exceptional drainage for reliable return and generous flowering.

Plant the two size 12/14 bulbs in fall, four to six weeks before lasting soil freeze. Set them point upward 10 cm (4 in) deep and 30 cm (12 in) apart in loose, fertile, sharply drained soil. Full sun strengthens the radiating form and keeps flower stalks solid. Water deeply after planting, then only when the surface dries during active growth. A little mature compost is sufficient in spring. In clay, plant on a mound improved with fine grit. After flowering, let every leaf yellow completely, then maintain comparatively dry summer dormancy. Mark the wide planting position so the invisible bulb remains undisturbed.

Allium schubertii deserves a visible foreground position beside a patio or within a large container where the 30 cm Allium flower can be admired from every angle. Pair this firework ornamental onion with thyme, sedums, blue fescue, silver artemisia, and dark heucheras. Numerous florets attract bees, bumblebees, and butterflies. Once dry, the umbel retains its exceptional form and becomes an Allium for dried bouquets with remarkable impact. Deer generally avoid onion-scented tissues, but every part remains toxic to pets; keep bulbs and arrangements beyond their reach. This pollinator friendly Allium creates extraordinary scale without requiring a tall stem.

In the garden

Exposure: Sun in partial shade
Life cycle: Naturalizing bulbous perennial
Hardiness: Zones 5 to 9

Planting guide

Planting & establishment

Planting depth

10 cm (4 in)

Spacing / density

30 cm (12 in) between bulbs

Planting period

Fall, four to six weeks before lasting soil freeze

Propagation

Bulb and offset division during dormancy

Growing method

Plant the bulbs in fall within a warm, sunny position. Loosen soil to 20 to 25 cm, incorporate a little mature compost, and broadly improve heavy ground with fine grit. Set every size 12/14 bulb point upward 8 cm deep and 10 cm from the next. Divide two bulbs among three or four drifts, cover, firm gently, and water deeply once. Mark every group precisely. Full sun keeps slender stems upright and able to support dense spherical heads without staking. Loose, sharply drained soil protects the small bulbs from excessive winter moisture. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets. An irregular group looks more natural than a row and creates a pink haze above fine foliage. Catmint, thyme, lavender, compact salvias, and grasses share its preference for sunny positions.

Soil and care

Soil & care

Soil pH

Acid to alkaline

Moisture

Moderate moisture in spring, followed by distinctly drier conditions during summer dormancy. Prevent standing water around bulbs, particularly in clay soil and during winter thaws, because persistent saturation encourages bulb rot. Light mulch may stabilize soil after freeze-up, but it must never trap water against the crown. Space irrigation carefully and always confirm that the upper soil layer has begun to dry before watering again.

Minimum temperature

-34°C (-30°F)

Care level

Easy

Drought tolerance

Yes

Watering

Water once after planting, then moderately during spring growth. Always let the surface dry between applications. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Always inspect moisture before watering again.

Soil type

Choose light, loose, sharply drained soil, ideally sandy or gravelly. A little compost feeds bulbs without creating an excessively rich pocket. Loose, sharply drained soil protects the small bulbs from excessive winter moisture. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season.

Fertilization

In spring, add a thin layer of mature compost around emerging shoots. Low-rate balanced fertilizer is sufficient in poor soil. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects.

Seasonal care

In fall, plant, label, and lightly protect the drifts after soil cools. In late winter, verify drainage and remove compacted debris. During spring, hand-weed around fine shoots and water only if soil dries. During bloom, avoid insecticides and decide which heads may develop bulbils. After flowering, cut no green leaf. Once foliage is fully yellow, clean at soil level and sharply reduce water. In cold zones, protect pots and microclimates before severe freezes. Mark every position because the foliage disappears completely when plants enter dormancy. In colder Canadian regions, grow bulbs in protected pots or select a warm microclimate. Airy umbels suit small cottage-style bouquets and dry while retaining a delicate silhouette. Inspect drainage after thaws and promptly correct every place where standing water remains. Divide groups only when they become crowded or flowering begins to decline. Avoid high-nitrogen fertilizers that encourage soft foliage at the expense of flowers. Full sun keeps slender stems upright and able to support dense spherical heads without staking. Loose, sharply drained soil protects the small bulbs from excessive winter moisture. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers.

Container growing

Recommended pot size

At least 25 cm (10 in) deep and 30 cm (12 in) wide

Use a frost-resistant container at least 25 cm deep and 30 cm wide with several large holes. Fill it with light potting mix enriched with compost and mineral material. Plant bulbs 8 cm deep, water once, and place the pot in sun. In regions colder than Zone 5, insulate the walls, temporarily sink the container, or overwinter it in a cold position protected from extreme freezes. Do not move it into a heated room. Catmint, thyme, lavender, compact salvias, and grasses share its preference for sunny positions. Mineral mulch limits weeds without trapping excessive moisture around the bulbs. Mark every position because the foliage disappears completely when plants enter dormancy. In colder Canadian regions, grow bulbs in protected pots or select a warm microclimate. Airy umbels suit small cottage-style bouquets and dry while retaining a delicate silhouette. Inspect drainage after thaws and promptly correct every place where standing water remains. Divide groups only when they become crowded or flowering begins to decline. Avoid high-nitrogen fertilizers that encourage soft foliage at the expense of flowers. Full sun keeps slender stems upright and able to support dense spherical heads without staking. Loose, sharply drained soil protects the small bulbs from excessive winter moisture. Water after planting, then only when the soil surface dries during active growth.

Size, flowering & harvest

Mature height

40 cm (16 in)

Width / spread

Approximately 30 to 40 cm (12 to 16 in)

Flower color

Mauve-pink to purplish pink

Foliage color

Mid-green

Foliage type

Deciduous, broad, basal, and strap-shaped

Growth rate

Moderate

Growth habit

Low broad rosette beneath a short sturdy stem

Fragrance

Light onion fragrance

Bloom period

From late spring into early summer, pinkish-purple star-shaped flowers open within dense spherical heads on 40 cm stems. Some heads may also carry several bulbils. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets. across the border and sunny containers nearby

Garden associations

Companion plants & uses

Companion plants

Pair Schubertii ornamental onion with thyme, lavender, catmint, compact salvias, dianthus, sedums, and fine grasses. These neighbours share its need for sun and drainage. Catmint, thyme, lavender, compact salvias, and grasses share its preference for sunny positions. Mineral mulch limits weeds without trapping excessive moisture around the bulbs. Mark every position because the foliage disappears completely when plants enter dormancy. In colder Canadian regions, grow bulbs in protected pots or select a warm microclimate. Airy umbels suit small cottage-style bouquets and dry while retaining a delicate silhouette. Maintain small open gaps for airflow.

Garden use

Divide two bulbs among three irregular drifts instead of one row. Place them near the front of a border so 40 cm flowers remain visible. Pair the pink haze with thyme, lavender, catmint, compact salvias, dianthus, and fine grasses. Pale gravel highlights stems and keeps the crown dry. Repeat groups along a path to guide the eye. Monitor bulbils and remove them where spreading would be undesirable. In a pollinator garden, add species flowering before and after Schubertii ornamental onion. An irregular group looks more natural than a row and creates a pink haze above fine foliage. Catmint, thyme, lavender, compact salvias, and grasses share its preference for sunny positions. Mineral mulch limits weeds without trapping excessive moisture around the bulbs. Mark every position because the foliage disappears completely when plants enter dormancy. In colder Canadian regions, grow bulbs in protected pots or select a warm microclimate. Airy umbels suit small cottage-style bouquets and dry while retaining a delicate silhouette. Inspect drainage after thaws and promptly correct every place where standing water remains. Divide groups only when they become crowded or flowering begins to decline. Avoid high-nitrogen fertilizers that encourage soft foliage at the expense of flowers. Full sun keeps slender stems upright and able to support dense spherical heads without staking.

Frequently asked questions

When and how should Allium schubertii be planted?

Plant two bulbs in fall, pointed end upward, 8 cm deep and 10 cm apart. Divide them among small drifts in warm, sunny, sharply drained soil. Loose, sharply drained soil protects the small bulbs from excessive winter moisture. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing.

Is Allium schubertii hardy in cold Canadian gardens?

Its hardiness is best suited to Zones 5 to 9. In colder Canadian regions, select a sheltered microclimate, protect the soil, or grow bulbs in a container overwintered cold but away from extreme freezing. Water after planting, then only when the soil surface dries during active growth. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing.

Why do some flowers produce basal offsets?

The ability to form several bulbils is a possible behaviour of the species. These small structures can fall and produce new plants, helping naturalization but requiring monitoring. A light application of mature compost in spring generally supports flowering sufficiently. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets. Monitor every chosen drift carefully.

How can the spread of Schubertii ornamental onion be limited?

Cut heads after flowering before seeds or bulbils mature, then watch for new plants in spring. Lift unwanted plants with their small bulb and avoid spreading soil containing bulbils. Let every leaf yellow naturally so bulbs can rebuild the reserves required for another season. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets. An irregular group looks more natural than a row and creates a pink haze above fine foliage.

Is Allium schubertii suitable for container growing?

Yes. Use a sharply drained pot at least 25 cm deep, light mix, and a sunny position. Container culture also simplifies winter protection in regions colder than Zone 5. Summer dormancy should remain comparatively dry, especially in heavy soil or containers. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets. An irregular group looks more natural than a row and creates a pink haze above fine foliage. Catmint, thyme, lavender, compact salvias, and grasses share its preference for sunny positions.

Wildlife and pets

Wildlife & precautions

Reported toxicity

Yes

Supporting wildlife

Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Cluster bulbs and avoid insecticides during bloom. Pink flowers provide pollen and nectar for bees, bumblebees, butterflies, and other beneficial insects. Some heads may produce basal offsets; remove them to limit spreading or retain them for naturalizing. Deer usually avoid onion-scented tissues, but the plant remains toxic to pets.