Deno’s Garden

Spiraea japonica

Genus Spiraea

Protocol

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  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
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Spiraea (Rosaceae). Some required light. S. japonica requires light for germination. Fresh seed or seed DS 6 m at 70 germ. 70L(100% in 3rd w),70D(none), 40-70L(t00% in 1-3 w), and 40-70D(nQne). Seed DS 6 m at 70 germ. in the same pattern, but the percentages were much lower.
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.