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Hudsonia ericoides

Genus Hudsonia

A mass of yellow five-petalled flowers with long stamens, crowded over a bristly-stemmed shrublet.
FlowerDoug McGrady from Warwick, RI, USACC BY 2.0

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around February 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 42 days to germinate.

61% germination in 7–42 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hudsonia p. 153Public domain
Show the original text
Hudsonia (Cistaceae). H. ericoides germ. 70L(61% in 1-6 w), 70D(43% in 1- 5 w), and 40(12%)-70(43% in 0-20 d). Seed DS 6 m at 70 germ. 70L(9%) and 70D(none) showing that DS is injurious to the seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hudsonia p. 153. 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 Moderate 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.

43% germination in 7–35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hudsonia p. 153Public domain
Show the original text
Hudsonia (Cistaceae). H. ericoides germ. 70L(61% in 1-6 w), 70D(43% in 1- 5 w), and 40(12%)-70(43% in 0-20 d). Seed DS 6 m at 70 germ. 70L(9%) and 70D(none) showing that DS is injurious to the seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hudsonia p. 153. 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 3

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around September 18, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 17, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    12 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Then 20 days to germinate.

43% germination in 0–20 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hudsonia p. 153Public domain
Show the original text
Hudsonia (Cistaceae). H. ericoides germ. 70L(61% in 1-6 w), 70D(43% in 1- 5 w), and 40(12%)-70(43% in 0-20 d). Seed DS 6 m at 70 germ. 70L(9%) and 70D(none) showing that DS is injurious to the seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hudsonia p. 153. 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 4

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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

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

9% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hudsonia p. 153Public domain
Show the original text
Hudsonia (Cistaceae). H. ericoides germ. 70L(61% in 1-6 w), 70D(43% in 1- 5 w), and 40(12%)-70(43% in 0-20 d). Seed DS 6 m at 70 germ. 70L(9%) and 70D(none) showing that DS is injurious to the seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hudsonia p. 153. 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.

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