Deno’s Garden

Zephyranthes elwesii

Genus Zephyranthes

Two sources report 4 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around October 4, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    35 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Then 3 days to germinate.

60% germination in 1–3 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Rhodophiala p. 71Public domain
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Rhodophiala (Amaryllidaceae). Eight samples of this genus have been received since the studies reported in the 2nd Ed. Germination was at 40 or in a k combination of 40 and 40-70. It is clear that an inhibitor is destroyed at 40 followed by germination at 40, but germination at 40 is slower than at 70 after the inhibiting system has been destroyed. This is the same pattern as Nemastylis acuta. R. elwesii (2 samples) germ. 40(90% in 3rd w) and 40(35% in 2-12 w)-70(60% in 1-3 d). In this second sample germination would undoubtedly have continued at 40 if the sample had been kept beyond 3 m at 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Rhodophiala p. 71. 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, 1996

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

No stated waiting before sowing. Then 21 days to germinate.

90% germination in 21 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Rhodophiala p. 71Public domain
Show the original text
Rhodophiala (Amaryllidaceae). Eight samples of this genus have been received since the studies reported in the 2nd Ed. Germination was at 40 or in a k combination of 40 and 40-70. It is clear that an inhibitor is destroyed at 40 followed by germination at 40, but germination at 40 is slower than at 70 after the inhibiting system has been destroyed. This is the same pattern as Nemastylis acuta. R. elwesii (2 samples) germ. 40(90% in 3rd w) and 40(35% in 2-12 w)-70(60% in 1-3 d). In this second sample germination would undoubtedly have continued at 40 if the sample had been kept beyond 3 m at 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Rhodophiala p. 71. 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 Low Rated by us, not by the source.

Start around January 11, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 84 days to germinate.

100% germination in 14–84 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rhodophiala p. 205Public domain
Show the original text
Rhodophiala (Amaryllidaceae). Although some species germ.. at 70, the general pattern in this genus is for germination to be best at 40. R. elwesii germ. 40(100% in 2-12 w) and 70(42% in 1-4 w)-40(19% in 5-10 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rhodophiala p. 205. 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 Moderate Rated by us, not by the source.

Start around December 8, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    19 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 28 days to germinate.

42% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rhodophiala p. 205Public domain
Show the original text
Rhodophiala (Amaryllidaceae). Although some species germ.. at 70, the general pattern in this genus is for germination to be best at 40. R. elwesii germ. 40(100% in 2-12 w) and 70(42% in 1-4 w)-40(19% in 5-10 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rhodophiala p. 205. 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.