Deno’s Garden

Phacelia sericea

Genus Phacelia

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 27, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: either

No stated waiting before sowing. Then 9 days to germinate.

80% germination in 4–9 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Phacelia p. 191Public domain
Show the original text
Phacelia (Hydrophyllaceae). P. sericea germ. 70(80-90% in 4-9 d) and 40(7%)-70. Light had no effect. This deleterious effect of sowing at 40 was observed on two independent samples.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Phacelia p. 191. 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 December 15, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: either

Steps after step 1 run on after germination.

about 3 months from start to sowing. Germination time not stated; 21 days assumed.

7% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Phacelia p. 191Public domain
Show the original text
Phacelia (Hydrophyllaceae). P. sericea germ. 70(80-90% in 4-9 d) and 40(7%)-70. Light had no effect. This deleterious effect of sowing at 40 was observed on two independent samples.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Phacelia p. 191. 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.