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Ranunculus bulbosus

Genus Ranunculus

A glossy yellow buttercup with five rounded petals, on a hairy stem above deeply cut leaves in rough grass.
FlowerAndreas EichlerCC BY-SA 4.0

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around January 18, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 77 days to germinate.

13% germination in 49–77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Ranunculus p. 70Public domain
Show the original text
Ranunculus (Ranunculaceae). R. bulbosus germ. 70D(8% in 7-11 w), 70L(13% in 7-11 w), 40-70(4%), OS(10% in 7-12 w), and none in OT or 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Ranunculus p. 70. 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 High Rated by us, not by the source.

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

  1. Alternating temperatures

    Temperature: 40–70°F 4–21°C

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

10% germination in 49–84 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Ranunculus p. 70Public domain
Show the original text
Ranunculus (Ranunculaceae). R. bulbosus germ. 70D(8% in 7-11 w), 70L(13% in 7-11 w), 40-70(4%), OS(10% in 7-12 w), and none in OT or 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Ranunculus p. 70. 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, 1996

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

Start around January 18, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 77 days to germinate.

8% germination in 49–77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Ranunculus p. 70Public domain
Show the original text
Ranunculus (Ranunculaceae). R. bulbosus germ. 70D(8% in 7-11 w), 70L(13% in 7-11 w), 40-70(4%), OS(10% in 7-12 w), and none in OT or 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Ranunculus p. 70. 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, 1996

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, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Ranunculus p. 70Public domain
Show the original text
Ranunculus (Ranunculaceae). R. bulbosus germ. 70D(8% in 7-11 w), 70L(13% in 7-11 w), 40-70(4%), OS(10% in 7-12 w), and none in OT or 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Ranunculus p. 70. 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 5

DerivedN. C. Deno, 1996

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

  1. Sow outdoors and leave it

    Nothing germinated outdoors.

No stated waiting before sowing.

0% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Ranunculus p. 70Public domain
Show the original text
Ranunculus (Ranunculaceae). R. bulbosus germ. 70D(8% in 7-11 w), 70L(13% in 7-11 w), 40-70(4%), OS(10% in 7-12 w), and none in OT or 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Ranunculus p. 70. 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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