Mendel’s Gardens

Xeranthemum annuum

Immortelle · Annual Everlasting

Family AsteraceaeGenus Xeranthemum

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

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

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

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

2% germination.

2%, and that is the whole of Deno's result for the species.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, XeranthemumPublic domain
Show the original text
Xeranthemum (Asteraceae). X. annuum germ. 70D(2%) and 40-70(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Xeranthemum. 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

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    Deno gives no length for this period; three months is his standard cycle.

  2. Warm moist stratification

    Temperature: 70°F 21°C

    Nothing.

about 3 months from start to sowing.

0% germination.

Nothing after a cold period.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, XeranthemumPublic domain
Show the original text
Xeranthemum (Asteraceae). X. annuum germ. 70D(2%) and 40-70(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Xeranthemum. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.