Hyacinth

Hyacinthus orientalis

Hyacinth blooms from March through April.

Bloom calendar

Bloom time

Mar–Apr

Hardiness

Zones 4–8

Sun

Full sun

Water

Moderate water

Mature size

10 in × 5 in

Type

Bulb

Verification

Core facts checked

Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.

Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–8. Expect it to reach about 10 in tall and 5 in wide at maturity, in roughly 1 year.

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When to plant Hyacinth

Hyacinth is a fall-planted bulb: get it in the ground 6 to 8 weeks before the ground freezes, typically September or October across zones 4 to 8. It pays you back the following March to April.

Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 6 in September.

Comes in 11 varieties across 7 colors

Same plant, same care - pick the color you are growing.

Good to know about Hyacinth

Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.

Safety

Toxic to dogs, cats and horses; all parts, and the bulb most of all. Eating it causes drooling, intense vomiting and diarrhea. per ASPCA

Worth knowing

One chemistry does three jobs: the calcium oxalate that makes the bulbs deer and rodent proof is the same stuff that poisons pets and gives bare hands 'hyacinth itch'. per NC State and Clemson

How deep to plant

Two rules of thumb differ, but for a standard bulb both land at 4 to 6 in deep. Plant deeper in light or sandy soil, shallower in heavy soil. per Clemson and University of Maryland

Force it for winter scent

A classic bulb to force indoors: give it 12 to 15 weeks of cold near 40 to 45 F, then a cool bright spot for flowers in weeks. per Iowa State and Wisconsin

Deer and squirrel proof

A reliable pick where deer and squirrels are a problem: they rarely touch the toxic, bitter bulbs, unlike tulips and crocus, which rodents love to dig up. per NC State and Clemson

Wear gloves when planting

Handling dry bulbs can cause 'hyacinth itch', an irritant rash from sharp calcium oxalate crystals in the bulb. Wear gloves and the problem goes away. per NC State and Clemson

Bloom fades over years

Left in the ground it needs no lifting, but the show fades: spikes loosen and flowers shrink year over year. Roman (multiflora) types are smaller but more persistent. per NC State and Clemson

What pairs well with Hyacinth

Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.

False Indigo
Shares full sun and low to moderate water; blooms in late spring as this one finishes; leafs out to hide the ripening bulb foliage as it dies back; taller at 3.3 ft, for the layer behind it.
Sneezeweed
Shares full sun and moderate water; blooms in midsummer, extending the bed's season; taller at 3.3 ft, for the layer behind it; both offer pollinator forage, in different months.
Perennial Sunflower
Shares full sun and moderate water; blooms in late summer, extending the bed's season; taller at 4.9 ft, for the layer behind it; both offer pollinator forage, in different months.
Blue Oat Grass
Shares full sun and low to moderate water; leafs out to hide the ripening bulb foliage as it dies back; blooms in early summer, extending the bed's season; evergreen, so the bed keeps its shape through winter.
Feather Reed Grass
Shares full sun and moderate water; blooms in early summer, extending the bed's season; taller at 4.9 ft, for the layer behind it; its seed heads stand through winter, for structure and the birds.
Fountain Grass
Shares full sun and low to moderate water; blooms in late summer, extending the bed's season; taller at 3.3 ft, for the layer behind it; its seed heads stand through winter, for structure and the birds.
Clematis
Shares full sun and moderate water; blooms in late spring as this one finishes; climbs to 9.8 ft behind it, height without the footprint; both offer pollinator forage, in different months.
Mock Orange
Shares full sun and moderate water; blooms in late spring as this one finishes; stands well above at 8.2 ft, a canopy to plant beneath; both offer pollinator forage, in different months.