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Rheum compactum

Compact Rhubarb · Thick-leaved Rhubarb

Family PolygonaceaeGenus Rheum

A broad clump of large ribbed leaves throwing up a dense cream plume of flowers, standing above meadow grass on a hillside.
The whole plantEvgeny BoginskyCC BY-SA 4.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
YellowFlora of China
Native range
Altay, Amur, Buryatiya, Chita, Irkutsk, Kamchatka and elsewhereGBIF 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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 March 15, 2027 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.

Germination happens during step 1; 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.

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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