Deno’s Garden

Helianthemum salicifolium

Willowleaf Frostweed · Willow-leaved Rock Rose

Family CistaceaeGenus Helianthemum

About the plant

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

Habit
Annual, Forb/herb

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Source: PLANTS Database — USDA NRCS.

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 29, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 7 days to germinate.

80% germination in 5–7 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, HelianthemumPublic domain
Show the original text
Helianthemum (Cistaceae). H. salicifolium germ. 70(80% in 5-7 d) and 40(71%)-70(12%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Helianthemum. 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 Low Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

    71% germinated at 40 itself.

  2. Warm moist stratification

    Temperature: 70°F 21°C

    A further 12% after the move.

No stated waiting before sowing. Germination time not stated; 21 days assumed.

71% germination.

Either route works; sowing at 70 is faster.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, HelianthemumPublic domain
Show the original text
Helianthemum (Cistaceae). H. salicifolium germ. 70(80% in 5-7 d) and 40(71%)-70(12%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Helianthemum. 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.