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Hyacinthus spp.

hyacinths

Asparagaceae

Eastern Mediterranean and western Asia

Attracts Pollinators Deer Resistant Fragrant (strong)Container Friendly

SunFull Sun – Part Shade

WaterMedium

HardinessZones 4–8

Overview

Hyacinthus spp. is a small genus of three species of bulbous perennials in the family Asparagaceae, native to the eastern Mediterranean and western Asia. The garden hyacinth, H. orientalis, is the source of the many cultivated forms. Plants grow from a tunicated bulb 1.5-3 inches (4-7.5 cm) across and reach 6-12 inches (15-30 cm) tall in flower. Each bulb produces a basal rosette of four to six strap-shaped, glossy green leaves and a single thick, upright stalk. The stalk carries a dense cylindrical raceme of 20 to 40 outward-facing, bell-shaped flowers, each with six recurved lobes. Wild plants bear loose spikes of blue to violet flowers; cultivated forms range across blue, purple, pink, red, white, cream, and pale yellow. The flowers are strongly fragrant. All parts contain oxalate crystals and other compounds, and the bulbs can irritate skin and are poisonous if eaten. Plants flower in early to mid spring, then die back to the bulb by early summer and stay dormant until the following year. Garden bulbs often produce smaller, looser flower spikes after the first season.

Native Range

Hyacinthus spp. is native to the eastern Mediterranean and western Asia, including Turkey, Syria, Lebanon, and Iran. Wild populations grow on rocky hillsides and in scrub. Centuries of cultivation have spread H. orientalis far beyond its natural range.

Suggested Uses

Hyacinthus spp. is planted in spring beds, borders, and containers, and is widely forced indoors for winter bloom. The fragrant spikes are used in mixed bulb plantings and as cut flowers. Bulbs are also grown in water over forcing glasses.

How to Identify

Look for a basal cluster of four to six strap-shaped glossy leaves and a single stout stalk 6-12 inches (15-30 cm) tall bearing a dense cylindrical raceme of bell-shaped flowers with six recurved lobes. The strong fragrance and tightly packed spike are characteristic. Cultivated forms show denser, fatter spikes than the loose wild type.

Appearance

Size & Dimensions

Height6" - 1'

Width/Spread3" - 6"

Colors

Flower Colors

red

Foliage Colors

Bloom Information

Bloom Period

~3 weeks

Spring

Hyacinths flower in early to mid spring, typically March to April in temperate gardens. Each spike lasts about two to three weeks. After flowering, leaves persist briefly before the plant dies back to the dormant bulb by early summer.

Detailed Descriptions

Flower Description

blue, purple, pink, red, white, cream, or yellow

Foliage Description

green

Growing Conditions

Sun Requirements

SunFull Sun SunPartial Shade

Requires 6-8 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.0(Neutral)

357912

Soil Types

loam sand

Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

Flowers first spring after autumn planting

Care & Maintenance

Care Guide

Hyacinthus spp. grows in full sun to light shade on well-drained soil with a pH near 6.0 to 7.0. Bulbs are planted in autumn about 4-6 inches (10-15 cm) deep for spring bloom. Cold winter dormancy is needed to trigger flowering, and plants are hardy in USDA zones 4 to 8. Even moisture during growth supports full spikes, but wet summer soil rots dormant bulbs. Flower spikes shrink in later years, so many growers treat hyacinths as short-term plantings. The bulbs contain skin-irritant oxalates.

Pruning

Remove spent flower spikes after blooming to stop seed formation. Let the leaves die down naturally so the bulb can rebuild reserves. Dormant bulbs may be lifted and stored once the foliage has yellowed.