Deno’s Garden

Castilleja parviflora

Genus Castilleja

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around March 1, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 35 days to germinate.

15% germination in 7–35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Castilleja p. 113Public domain
Show the original text
Castilleja (Scrophulanlaceae). There have been suggestions that Castilleja seed is difficult to germinate and that chemical exudate from the roots of host species (Castilleja are parasitic). are needed to induce germination. None of this is in accord with the results herein, and patterns were found that gave excellent germination without the addition of any exogenous chemical. Most of the species germinate largely at 40. The seedlings grow vigorously until the stem has elongated to the point of producing 5-10 true leaves. Then the seedlings lose vigor and die off showing the need for a host plant. These conclusions were based on studies on seventeen samples. No photoeffects were found in five experiments. Although the germination of the seed occurs without any exudate from a host, it is still possible and perhaps probable that an exudate from a host is required for the development of the haustoria. DS is tolerated for a y, but seeds DS for 4 y were all dead. C. parviflora germ. 70D(15% in 1-5w) and 40-70(4%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Castilleja p. 113. 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 Very high Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Germination time not stated; 21 days assumed.

4% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Castilleja p. 113Public domain
Show the original text
Castilleja (Scrophulanlaceae). There have been suggestions that Castilleja seed is difficult to germinate and that chemical exudate from the roots of host species (Castilleja are parasitic). are needed to induce germination. None of this is in accord with the results herein, and patterns were found that gave excellent germination without the addition of any exogenous chemical. Most of the species germinate largely at 40. The seedlings grow vigorously until the stem has elongated to the point of producing 5-10 true leaves. Then the seedlings lose vigor and die off showing the need for a host plant. These conclusions were based on studies on seventeen samples. No photoeffects were found in five experiments. Although the germination of the seed occurs without any exudate from a host, it is still possible and perhaps probable that an exudate from a host is required for the development of the haustoria. DS is tolerated for a y, but seeds DS for 4 y were all dead. C. parviflora germ. 70D(15% in 1-5w) and 40-70(4%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Castilleja p. 113. 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.