Deno’s Garden

Tropaeolum sessilifolium

Genus Tropaeolum

Protocol

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  1. Cold moist stratification

    Temperature: 40°F 4°C

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

100% germination in 21 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Tropaeolum p. 225Public domain
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Tropaeolum (Tropaeolaceae). Although they have not been exhaustively studied, the best germinations were obtained by giving the seeds -4w at 70 and shifting to 40. Germination at 40 occurs in the 3rd w, but the seedlings must be kept at 40 until the stem begins to emerge (hypogeal). Several of these species are hardy in England if the tuber is below frost line. Young plants need to be grown under milder conditions until is tuber is large enough to place below frost line. It remains to be seen if deep planting of the tuber can effect hardiness in Eastern U.S. T. sessilifolium germ. 4/4 in the 3rd w at 40 if given a prior 4 w at 70. When sown directly at 40 only 1/3 germ. in the 4th w. If after 6 w at 40 the seed was given 4 w at 70 and shifted back to 40, the remaining 2/3 germ. in the 3rd w in a behavior identical to that of
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Tropaeolum p. 225. 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.