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Heuchera hallii

Front Range Alumroot

Family SaxifragaceaeGenus Heuchera

Thin reddish stems hung with small creamy bell flowers, rising from lobed leaves between gray rocks
The whole plantGhislain118 (AD) http://www.fleurs-des-montagnes.netCC BY-SA 3.0

About the plant

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

Habit
perennialPlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
WhiteFlora of North America
Native range
Colorado, New MexicoGBIF Backbone Taxonomy

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

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS; Flora of North America — Flora of North America Editorial Committee; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High 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. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: light

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: light

about 6 months from start to step 3. Germination happens during step 3, in 14 days.

12% 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. hallii required light in a 3 cycle treatment as shown by 70L-40-70L(12% in 2nd w) and none in 70D-40-70D.
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

DerivedN. C. Deno, 1993

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

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. hallii required light in a 3 cycle treatment as shown by 70L-40-70L(12% in 2nd w) and none in 70D-40-70D.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Heuchera p. 152. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

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

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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