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About the plant What it is and where it grows — not part of any germination protocol.
The plant
Habit Herbaceous Perennial, Wildflower Extension Gardener Plant Toolbox
Habit perennial Plants of the World Online
Height 0.7-2.7 ft 20-80 cm Extension Gardener Plant Toolbox
Spread 1.5-2 ft 45-60 cm Extension Gardener Plant Toolbox
Flower Pink, White Extension Gardener Plant Toolbox
Blooms Fall, Spring, Summer Extension Gardener Plant Toolbox
Hardiness zones 3-8 Extension Gardener Plant Toolbox Growing conditions
Sun Dappled Sunlight; Partial Shade Extension Gardener Plant Toolbox
Soil High Organic Matter Extension Gardener Plant Toolbox
Soil pH Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0) Extension Gardener Plant Toolbox
Moisture Good Drainage, Moist Extension Gardener Plant Toolbox Toxicity is noted only where a source states it. No note here is not a finding of safety.
Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew.
Worth knowing Hairy alumroot grows only on rock outcrops, on cliffs and boulders, in the eastern United States, and it is considered endangered in Ohio. Some garden cultivars have reddish leaves. Wikipedia: Heuchera villosa This source reports 5 treatments. All are shown.
Protocol 1 N. C. Deno, 1993 Difficulty Moderate Rated by us, not by the source.
Start around September 24, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 23, 2026.
1 Dry storage
Duration: 180 days · Temperature: 70°F 21°C
2 Sow and cover
Temperature: 70°F 21°C · Light: light
about 6 months from start to sowing. Then 14 days to germinate.
30% germination in 14 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Heuchera p. 152Public domain Show the original text Heuchera (Saxlfragaceae). The small seeds cannot be readily separated from the capsules and chaff so that seed counts are inaccurate. H, cylindrica germ. 70D(5% in 3rd w), 70L(13% in 3rd w), 40(4%)-70, and 40% in April in outdoor treatment. These behaviors contrast sharply with the behaviors of seeds that had been DS for 2 y. These germ. 70L(43% in 3rd w), .70D GA-3(31% in 2- 4 w), and 700(none). The GA-3 seedlings were normal. H. villosa germination was improved by DS for 6 m at 70. The DS seeds germ. 70L(30% in 2nd w), 70 GA-3(18%), and 70D(none). Fresh seeds germ. 70L(12% in 3rd w), 70D GA-3(30% in 2nd w), 70D(none), 40-70(10% on 6th d), and 40- 70D(none). Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. 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 N. C. Deno, 1993 Difficulty Moderate Rated by us, not by the source.
Start around March 22, 2027 for a May 3 last frost.
1 2 Sow and cover
Temperature: 70°F 21°C · Light: dark
No stated waiting before sowing. Then 14 days to germinate.
30% germination in 14 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Heuchera p. 152Public domain Show the original text Heuchera (Saxlfragaceae). The small seeds cannot be readily separated from the capsules and chaff so that seed counts are inaccurate. H, cylindrica germ. 70D(5% in 3rd w), 70L(13% in 3rd w), 40(4%)-70, and 40% in April in outdoor treatment. These behaviors contrast sharply with the behaviors of seeds that had been DS for 2 y. These germ. 70L(43% in 3rd w), .70D GA-3(31% in 2- 4 w), and 700(none). The GA-3 seedlings were normal. H. villosa germination was improved by DS for 6 m at 70. The DS seeds germ. 70L(30% in 2nd w), 70 GA-3(18%), and 70D(none). Fresh seeds germ. 70L(12% in 3rd w), 70D GA-3(30% in 2nd w), 70D(none), 40-70(10% on 6th d), and 40- 70D(none). Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. 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 3 N. 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 Dry storage
Duration: 180 days · Temperature: 70°F 21°C
2 3 Sow and cover
Temperature: 70°F 21°C
about 6 months from start to sowing. Germination time not stated; 21 days assumed.
18% germination.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Heuchera p. 152Public domain Show the original text Heuchera (Saxlfragaceae). The small seeds cannot be readily separated from the capsules and chaff so that seed counts are inaccurate. H, cylindrica germ. 70D(5% in 3rd w), 70L(13% in 3rd w), 40(4%)-70, and 40% in April in outdoor treatment. These behaviors contrast sharply with the behaviors of seeds that had been DS for 2 y. These germ. 70L(43% in 3rd w), .70D GA-3(31% in 2- 4 w), and 700(none). The GA-3 seedlings were normal. H. villosa germination was improved by DS for 6 m at 70. The DS seeds germ. 70L(30% in 2nd w), 70 GA-3(18%), and 70D(none). Fresh seeds germ. 70L(12% in 3rd w), 70D GA-3(30% in 2nd w), 70D(none), 40-70(10% on 6th d), and 40- 70D(none). Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. 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 4 N. C. Deno, 1993 Difficulty High Rated by us, not by the source.
Start around March 15, 2027 for a May 3 last frost.
1 Sow and cover
Temperature: 70°F 21°C · Light: light
No stated waiting before sowing. Then 21 days to germinate.
12% germination in 21 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Heuchera p. 152Public domain Show the original text Heuchera (Saxlfragaceae). The small seeds cannot be readily separated from the capsules and chaff so that seed counts are inaccurate. H, cylindrica germ. 70D(5% in 3rd w), 70L(13% in 3rd w), 40(4%)-70, and 40% in April in outdoor treatment. These behaviors contrast sharply with the behaviors of seeds that had been DS for 2 y. These germ. 70L(43% in 3rd w), .70D GA-3(31% in 2- 4 w), and 700(none). The GA-3 seedlings were normal. H. villosa germination was improved by DS for 6 m at 70. The DS seeds germ. 70L(30% in 2nd w), 70 GA-3(18%), and 70D(none). Fresh seeds germ. 70L(12% in 3rd w), 70D GA-3(30% in 2nd w), 70D(none), 40-70(10% on 6th d), and 40- 70D(none). Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. 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 5 N. C. Deno, 1993 Difficulty High Rated by us, not by the source.
Start around December 30, 2026 for a May 3 last frost.
1 Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
2 Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
about 3 months from start to step 2. Germination happens during step 2, in 6 days.
10% germination in 6 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Heuchera p. 152Public domain Show the original text Heuchera (Saxlfragaceae). The small seeds cannot be readily separated from the capsules and chaff so that seed counts are inaccurate. H, cylindrica germ. 70D(5% in 3rd w), 70L(13% in 3rd w), 40(4%)-70, and 40% in April in outdoor treatment. These behaviors contrast sharply with the behaviors of seeds that had been DS for 2 y. These germ. 70L(43% in 3rd w), .70D GA-3(31% in 2- 4 w), and 700(none). The GA-3 seedlings were normal. H. villosa germination was improved by DS for 6 m at 70. The DS seeds germ. 70L(30% in 2nd w), 70 GA-3(18%), and 70D(none). Fresh seeds germ. 70L(12% in 3rd w), 70D GA-3(30% in 2nd w), 70D(none), 40-70(10% on 6th d), and 40- 70D(none). Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. 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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