Plant the bulbs in fall after the soil cools, ideally four to six weeks before it freezes solid. Choose full sun or bright partial shade and loosen very well-drained soil. Set every bulb pointed end up 10 cm (4 in) deep and 10 cm (4 in) from the next. Arrange all five bulbs in an irregular pocket rather than a straight row for a natural effect. Water deeply once to settle the soil, then allow normal rainfall to provide most moisture. In clay, add fine grit or raise the planting area to prevent stagnant winter moisture. Label the position before winter so emerging shoots are not disturbed during spring cleanup or early cultivation.
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Ornamental bulb
Amaryllidaceae
Fall bulbs · Ornamental alliums
Bulgarian honey garlic (Nectaroscordum siculum subsp. bulgaricum)
Nectaroscordum siculum subsp. bulgaricum
Bulgarian honey garlic, also sold as Allium Bulgaricum, is a naturalizing bulb with truly distinctive flowers. Each package contains five size 8/9 bulbs. In late spring, slender 90 cm stems carry loose umbrellas of cream, green and plum-purple bells that sway in the wind before turning upward as graphic seed capsules. Suitable for Zones 6 to 10 according to Van Noort, it grows in sun or partial shade in fertile, drained soil. Its light fragrance and nectar attract pollinators, while its graceful silhouette suits cottage borders, naturalistic gardens, fresh bouquets, dried arrangements and large containers.
Quantity
5 bulbs
Exposure
Full sun or bright partial shade
Hardiness
Zones 6 to 10 according to Van Noort
Difficulty level
Easy
Discover the plant
Family
Amaryllidaceae
Genus
Nectaroscordum
Species
siculum subsp. bulgaricum
Type
Ornamental bulb
Cycle
Naturalizing bulbous perennial
Bulgarian honey garlic (Nectaroscordum siculum subsp. bulgaricum), often sold as Allium Bulgaricum, is an ornamental bulb valued for its unusual silhouette. This Van Noort package contains five size 8/9 bulbs. In late spring, each produces a slender stem about 90 cm (36 in) tall, topped by a loose umbrella-shaped umbel. Nodding cream and greenish-white bells carry plum-purple markings and green eyes. As flowers age, their stalks turn upward and developing capsules become strikingly graphic. Hardy in Zones 6 to 10 according to Van Noort, the plant naturalizes when left undisturbed in well-drained soil. Its graceful movement remains clearly visible. The bulbs appreciate a stable planting that is not cultivated every season. Dried capsules preserve their unusual form for months.
Plant all five bulbs in fall, pointed end up, 10 cm (4 in) deep and 10 cm (4 in) apart. Choose full sun or bright partial shade and loosen fertile soil that never stays waterlogged. Water after planting to settle the soil. In spring, maintain moderate moisture while stems elongate without allowing water to collect around the bulbs. A thin layer of compost is sufficient; excess nitrogen produces weak foliage. After flowering, retain the leaves until they yellow completely. The bulbs then prefer relatively dry summer dormancy and flower best when left in the same place for several years.
Use Bulgaricum in cottage borders, naturalistic plantings, pollinator gardens, gravel gardens or large containers. Its moving bells add height without creating an opaque screen and combine with foxgloves, columbines, peonies, catmint, salvias and grasses. Fragrant, nectar-rich flowers attract bees and butterflies, while the garlic scent generally discourages deer. Cut stems when several bells are open for fresh arrangements, or leave capsules to rise and dry in place. If self-sown seedlings become excessive, remove heads before seeds mature. Divide offsets in summer only when clumps become crowded or flower less freely.
Planting guide
From planting to establishment.
Planting depth
10 cm (4 in)
Spacing / density
10 cm (4 in) between bulbs according to Van Noort; group all five bulbs
Best planting time
Fall, before the ground freezes solid
Propagation
Separate offsets in summer or sow seed in containers in a cold frame in fall or spring
Growing method
In fall, choose full sun or bright partial shade and loosen the soil to at least 25 cm. Drainage must be rapid, especially in winter; add fine grit to heavy soil or create a slight mound. Set all five bulbs pointed end up 10 cm (4 in) deep and 10 cm (4 in) apart in a small irregular group. Backfill, firm gently and water deeply once. Autumn rainfall is generally sufficient afterward. In spring, keep soil moderately moist during emergence and stem extension, but allow the surface to dry between waterings. Spread a thin layer of compost or a small amount of balanced fertilizer at the start of growth. Avoid excess nitrogen, which makes stems less sturdy. After flowering, let capsules mature if you welcome some self-sowing; otherwise, remove them before seeds ripen. Retain every leaf until it yellows completely so bulbs rebuild their reserves. Then reduce water sharply through summer dormancy. Leave the bulbs undisturbed for several years to achieve the best flowering. If a clump becomes too dense, lift it in summer, separate healthy offsets and replant them in fall. Label the planting location before winter so the bulbs are not disturbed during spring cleanup or summer cultivation.
Soil and care
The right conditions.
Exposure
Full sun or bright partial shade
Soil pH
Acidic, neutral or alkaline when drainage is good
Hardiness zone
Zones 6 to 10 according to Van Noort
Minimum temperature
Zone 6
Watering
Water deeply after fall planting, then allow normal rainfall to take over. In spring, maintain moderate moisture through emergence, stem extension and flowering while allowing the surface to dry between applications. Never saturate the bulbs, and empty container saucers after rain. As foliage yellows, gradually reduce irrigation. During summer dormancy, the soil should remain relatively dry; constant moisture at this stage increases the risk of bulb rot. In exposed containers, check moisture more often during warm, windy weather, but always let excess water escape freely.
Soil type
Choose light to medium, fertile, loose and very well-drained soil. Loam amended with a modest amount of compost is ideal. The plant tolerates acidic, neutral or alkaline conditions but performs poorly in standing winter moisture. In clay, incorporate horticultural grit and slightly raise the planting area. Avoid fresh manure, excessively rich substrates and hollows where melting snow accumulates. The bulbs flower best when left undisturbed for years in an open, aerated soil structure.
Fertilization
In early spring, spread a thin layer of mature compost or a small amount of balanced slow-release granular fertilizer. Work it gently into the surface without damaging shoots or concentrating product against the bulbs. One application is generally sufficient in fertile soil. Avoid high-nitrogen formulas that encourage excessive leaves and weaker stems at the expense of flowers. In containers, use half the recommended rate and stop feeding as soon as foliage begins to yellow. If growth is already vigorous and flowering is satisfactory, omit fertilizer rather than encouraging unnecessarily lush foliage.
Seasonal care
In fall, plant as soon as the soil cools, then water deeply once. Mark the location so bulbs are not disturbed during spring work. In winter, avoid compact mulch and make sure melting snow or rain never forms puddles. In spring, gently remove debris, add a thin layer of compost and water only when the surface begins to dry. Stems may sway naturally; discreet staking is useful only in a very windy corridor. Watch for slugs around emerging shoots, although the plant is generally little troubled by pests or diseases. During flowering, take a few stems for bouquets without removing every bloom needed by pollinators. After bloom, choose whether to let the graphic capsules mature or cut them to limit self-sowing. Never remove green leaves. Wait until they yellow completely, then reduce irrigation to keep bulbs relatively dry in summer. Every three to five years, if flowering declines or the clump becomes crowded, lift bulbs during dormancy, discard soft specimens, separate offsets and keep them dry until fall replanting. Clean tools before moving to another allium planting. Inspect containers after heavy rain, clear blocked drainage holes and replace any compact mulch. Mark self-sown groups so young seedlings are not mistaken for weeds the following spring. Record weak-flowering areas before dormancy, because their location becomes difficult to identify once foliage disappears. If drainage has deteriorated, improve the bed during replanting instead of simply returning bulbs to the same wet pocket.
Container growing
A controlled environment.
Recommended pot size
Container at least 30 cm (12 in) wide and 30 cm (12 in) deep for five bulbs
Bulgaricum grows well in containers when the pot is deep, stable and perfectly drained. For all five bulbs, choose a container at least 30 cm (12 in) wide and deep with several unobstructed holes. Use lightweight potting mix blended with mature compost and horticultural grit or perlite. Set bulbs pointed end up 10 cm (4 in) deep and space them so they do not touch. Water after planting, then keep the mix lightly moist and never saturated. Place the pot in full sun or bright partial shade and protect tall stems from violent wind. Near the cold edge of Zone 6, insulate the sides, move the container to a sheltered place or temporarily sink it into the ground to reduce repeated freezing and thawing. Resume moderate watering in spring and apply half-strength balanced fertilizer. After flowering, let foliage yellow, then keep the substrate drier through dormancy. Always empty the saucer after rain. Divide offsets when the pot becomes congested and renew the upper layer of mix before fall replanting. Mark the bulb positions after foliage disappears so they are not damaged when seasonal companions are replaced. Inspect drainage after heavy rain and remove any compacted surface crust before winter.
Bloom and dimensions
The complete profile.
Flower color
Cream and greenish white, marked with plum purple and green
Foliage color
Green
Foliage type
Deciduous, basal and narrow
Growth rate
Moderate; reaches mature size in about 2 to 5 years
Bloom period
Flowering occurs from late spring into early summer. Slender 90 cm (36 in) stems carry loose, umbrella-shaped umbels. Each nodding bell is cream or greenish white, marked with plum purple and centred by a green eye. Papery flowers move in the wind, carry a light fragrance and supply nectar to bees and butterflies. After pollination, the flower stalks turn upward and transform the head into a crown of decorative seed capsules. Cool weather may extend the display, while unusual heat can shorten it; nearby perennials maintain colour after the bells fade.
Fruiting
After flowering, the stalks turn upward and carry dry capsules containing black seeds. This fruiting stage is not intended for food, but it greatly extends the plant’s architectural value and suits dried arrangements. Let a few capsules mature if you welcome moderate self-sowing. To limit dispersal or direct more energy toward the bulbs, remove heads before full maturity while never cutting leaves that are still green.
Garden associations
What to plant with it.
Good companions
Pair Bulgaricum with foxgloves, columbines, peonies, hardy geraniums, catmint, salvias, astrantias and fine grasses. Their foliage gradually hides the allium leaves as they yellow, while their flowers extend the season of interest. Pale pink, burgundy, mauve, white and silver tones echo its cream, green and plum markings. Choose companions that accept good drainage and moderate summer moisture. Avoid plants requiring heavy irrigation while the bulbs are dormant. Lower alliums can extend the theme, but leave enough space for every flower umbrella to remain visible.
Avoid planting with
Bulgaricum is generally trouble-free, but compact or waterlogged soil can cause bulb rot and white rot. Persistent leaf moisture may encourage downy mildew. Slugs can nibble emerging shoots, while allium leaf miner or onion fly may occur locally. Inspect bulbs and discard soft or mouldy specimens. Prevent problems with excellent drainage, rotation away from other alliums, clean tools and good air circulation. Never compost seriously diseased material. Deer generally avoid the plant. Regular inspection makes early intervention easier.
Use Bulgaricum as an ornamental bulb for cottage borders, naturalistic beds, pollinator gardens, gravel gardens, bright woodland edges or large containers. Plant at least five bulbs together so the multicoloured bells remain clearly visible. Airy stems add height without hiding neighbouring plants. Flowers feed bees and butterflies and provide excellent cut stems. Upright capsules then become decorative outdoors or in dried bouquets, while the bulbs can naturalize over time. Because its foliage is narrow and its flower heads remain open rather than dense, the plant layers especially well through established perennial beds.
Frequently asked questions
Everything toknow.
This upward movement is a normal stage of fruiting. During bloom, the bells hang below the umbel, protecting reproductive structures and offering an accessible form to pollinators. After fertilization, the flower stalks curve upward and present developing capsules. This transformation supports seed maturation and dispersal while creating a highly graphic crown. You may leave capsules to dry in place and extend the border display or cut them for a dried arrangement. If you want to limit self-sowing, remove the heads before the black seeds become fully mature. This two-stage silhouette is one of the species’ main ornamental qualities. Keep several heads on the plant until they are fully dry if you want the strongest architectural effect, but remove excess seedlings the following spring.
Yes, but use a stable, freely draining container at least 30 cm (12 in) wide and deep for all five bulbs. Plant them 10 cm (4 in) deep in lightweight potting mix amended with compost and grit. Place the pot in sun or partial shade and protect tall stems from violent wind. Near the cold edge of Zone 6, insulate the sides, move the container to a sheltered place or temporarily sink it into the ground to reduce repeated freezing and thawing. After bloom, let foliage yellow, reduce watering and always empty the saucer. Mark the bulb positions after foliage disappears so seasonal planting or soil cultivation does not damage them during summer dormancy.
Never cut the leaves while they remain green. They continue photosynthesis and rebuild reserves needed for the next flowering season. Wait until they are completely yellow and detach easily. The decision about capsules depends on your goal. Let them mature if you enjoy their graphic form, want dried bouquets or welcome some self-sowing. Remove them before seeds ripen if you want to limit dispersal and direct more energy toward the bulbs. In every case, gradually reduce watering as foliage yellows and mark the location after leaves disappear completely. This patience is essential for maintaining vigorous bulbs and regular flowering. If neighbouring foliage hides the yellow leaves, there is no need to tie, braid or remove them prematurely.
Yes. Tall stems and cream, green and plum bells bring an unusual shape, movement and light texture to late-spring bouquets. For a fresh arrangement, cut early in the morning when several bells are open, place stems immediately in water and remove foliage below the waterline. For a dried bouquet, wait until capsules have turned upward and are nearly dry, then hang stems upside down in a dark, ventilated place. Do not harvest every flower: leave several for pollinators and retain the leaves until they have yellowed completely. Choose straight, undamaged stems so the floral umbrellas remain balanced in the vase. Dried capsules can retain their shape for months when protected from humidity and direct sunlight.
Its strengths, naturally.
Not recommended for pets
Pets
Attracts or supports pollinating insects
Pollinators
Plants that attract butterflies
Butterflies
Helps repel certain pests
Repellent
Less attractive or generally tolerated by deer
Deer
