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Lewisia rediviva

Oregon Bitter-root · Bitter Root

Family MontiaceaeGenus Lewisia

A wide pale pink flower of many narrow petals, opening from a rosette of red-brown scales
FlowerWalter Siegmund (talk)CC 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
Rose, pinkFlora of North America
Native range
Canada, lower 48 statesPLANTS Database

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.

Worth knowing

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in February.

No stated waiting before sowing.

70% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Lewisia p. 166Public domain
Show the original text
Lewisia (Portulacaceae). Germination of L. rediviva germ. best when sown at low T as shown by 40(65% in 2-7 w) and 70% in February in outdoor treatment. A prior 3 m at 70 or DS is detrimental as shown by 40(15%) for seed DS 6 m at 70 and 70-40(8%) for fresh seed. The cotyledons develop completely at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Lewisia p. 166. 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 Moderate Rated by us, not by the source.

Start around February 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 49 days.

65% germination in 14–49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Lewisia p. 166Public domain
Show the original text
Lewisia (Portulacaceae). Germination of L. rediviva germ. best when sown at low T as shown by 40(65% in 2-7 w) and 70% in February in outdoor treatment. A prior 3 m at 70 or DS is detrimental as shown by 40(15%) for seed DS 6 m at 70 and 70-40(8%) for fresh seed. The cotyledons develop completely at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Lewisia p. 166. 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

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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Temperature: 40°F 4°C

about 6 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

15% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Lewisia p. 166Public domain
Show the original text
Lewisia (Portulacaceae). Germination of L. rediviva germ. best when sown at low T as shown by 40(65% in 2-7 w) and 70% in February in outdoor treatment. A prior 3 m at 70 or DS is detrimental as shown by 40(15%) for seed DS 6 m at 70 and 70-40(8%) for fresh seed. The cotyledons develop completely at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Lewisia p. 166. 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

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

Start around December 15, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

8% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Lewisia p. 166Public domain
Show the original text
Lewisia (Portulacaceae). Germination of L. rediviva germ. best when sown at low T as shown by 40(65% in 2-7 w) and 70% in February in outdoor treatment. A prior 3 m at 70 or DS is detrimental as shown by 40(15%) for seed DS 6 m at 70 and 70-40(8%) for fresh seed. The cotyledons develop completely at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Lewisia p. 166. 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.

Germination trials

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

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