Deno’s Garden

Pennellianthus frutescens

Genus Pennellianthus

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 13 days to germinate.

70% germination in 11–13 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Penstemon p. 187Public domain
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Penstemon (Scrophulariaceae). Four types of germination were observed. Most Rocky Mountain species of a perennial nature germ. largely at 40 and often sowing at 70 was fatal or near fatal. A second group are short lived species that can flower the first year from seed typified by P. frutescens from Eastern Siberia is the one Penstemonthát is not native to America. It requires light for germination. Seed germ. 70L(70% in 11-13 d) and none in IOD. A prior 3 m at 40 or 3 m in 70D had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Penstemon p. 187. 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.