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Hyacinthus orientalis

Genus Hyacinthus

A dense spike of magenta hyacinth flowers with curled-back petals, above thick green leaves wet with rain
FlowerDerek RamseyGNU FDL 1.2

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit
Bulb, Herbaceous PerennialExtension Gardener Plant Toolbox
Height
0.7-1 ft20-30 cmExtension Gardener Plant Toolbox
Spread
3-6 in10-15 cmExtension Gardener Plant Toolbox
Flower
Blue, Gold/Yellow, Orange, Pink, Purple/Lavender, Red/Burgundy, WhiteExtension Gardener Plant Toolbox
Blooms
SpringExtension Gardener Plant Toolbox
Hardiness zones
4-8Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sun; Partial ShadeExtension Gardener Plant Toolbox
Soil
High Organic Matter, Loam (Silt)Extension Gardener Plant Toolbox
Soil pH
Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good DrainageExtension Gardener Plant Toolbox

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Source: Extension Gardener Plant Toolbox — NC State Extension.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around August 13, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 12, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to sowing. Then 56 days to germinate.

100% germination in 42–56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hyacinthus p. 153Public domain
Show the original text
Hyacinthus (Liliaceae). H. orientalis germ. 70-40(100% in 6-8 w) and 40(2%)-70(20%). This latter would probably have given more germination if the experiment had been continued for another cycle. Seed DS 6 m at 70 is all dead, and seed DS 6 m at 40 is largely dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hyacinthus p. 153. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Germination time not stated; 21 days assumed.

20% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hyacinthus p. 153Public domain
Show the original text
Hyacinthus (Liliaceae). H. orientalis germ. 70-40(100% in 6-8 w) and 40(2%)-70(20%). This latter would probably have given more germination if the experiment had been continued for another cycle. Seed DS 6 m at 70 is all dead, and seed DS 6 m at 40 is largely dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hyacinthus p. 153. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

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