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Spiraea canescens

Himalayan Spiraea · Himalayan Spirea

Family RosaceaeGenus Spiraea

Flat clusters of small white flowers with pale centers, crowded along twigs of tiny green leaves.
FlowerDinesh Valke from Thane, IndiaCC BY-SA 2.0

About the plant

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

Habit
shrubPlants of the World Online
Flower
White, pinkishFlora of China
Native range
Assam, China North-Central, China South-Central, East Himalaya, Myanmar, Nepal 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 Light: light

No stated waiting before sowing. Then 21 days to germinate.

100% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Spiraea p. 217Public domain
Show the original text
Spiraea (Rosaceae). Some required light. S. canescens germ. 70D or 70L(100% in 3rd w) and 40(6%)-70(70%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Spiraea p. 217. 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

    6 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

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

70% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Spiraea p. 217Public domain
Show the original text
Spiraea (Rosaceae). Some required light. S. canescens germ. 70D or 70L(100% in 3rd w) and 40(6%)-70(70%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Spiraea p. 217. 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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