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Tropaeolum sessilifolium

Nasturtium

Family TropaeolaceaeGenus Tropaeolum

Pink trumpet flowers with orange throats, and buds, among narrow gray-green leaves
FlowerPhilip PreceyCC0

About the plant

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

Habit
tuberous geophytePlants of the World Online
Flower
Pink, orangeRead from the photograph on this page
Native range
Chile CentralGBIF 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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Protocol

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 21 days.

100% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Tropaeolum p. 225Public domain
Show the original text
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.

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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