Deno’s Garden

Rheum compactum

Genus Rheum

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low 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

No stated waiting before sowing. Germination time not stated; 21 days assumed.

100% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rheum p. 204Public domain
Show the original text
Rheum (Polygonaceae). Germination was immediate at both 70 and 40. R. altaicum germ. 70(8/8 in 3-4 .d) and 40(5/7)-70(2/7).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rheum p. 204. 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 December 15, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    2/7 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Germination time not stated; 21 days assumed.

71% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rheum p. 204Public domain
Show the original text
Rheum (Polygonaceae). Germination was immediate at both 70 and 40. R. altaicum germ. 70(8/8 in 3-4 .d) and 40(5/7)-70(2/7).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rheum p. 204. 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.