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Thalictrum tuberiferum

Tuberous-rooted Meadow-rue

Family RanunculaceaeGenus Thalictrum

A loose head of small white flowers on thread-fine stalks, above leaves cut into rounded toothed leaflets, on a woodland floor.
FlowerAlpsdakeCC BY-SA 4.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
perennialPlants of the World Online
Flower
WhiteRead from the photograph on this page
Native range
Japan, Korea, Manchuria, PrimoryeGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Two sources report 6 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in April-May.

No stated waiting before sowing.

85% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Thalictrum p. 81Public domain
Show the original text
Thalictrum (Ranunculaceae). Most of the species in this genus have a GA-3 requirement for germination and most die quickly in DS. T. tuberiferum had been reported to germ. 1% in OT, but it is now found that when the expt. is continued germination is 85% in April-May from seed placed outdoors a year earlier in April. This treatment is more certain of producirig healthy seedlings than the GA-3 initiated germination reported earlier. It is possible that seeds placed in OT in the fall would have germ. the following spring.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Thalictrum p. 81. 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 September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Gibberellic acid soak

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to step 4. Germination happens during step 4, in 21 days.

88% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. tuberiferum germination is stimulated by GA-3. Seeds germ. 70 GA-3(63% in 3rd w), 40-70 GA-3(76% in 2nd w),,and 70-40-70 GA-3(88% in 3rd w). As indicated the GA-3 was applied after the shift to 70. Untreated seeds germ. 70D-40-70D(15% in 2nd m), 40-70D(none), and 1% in outdoor treatment. Removing the seed coat had no effect. The seedlings from the GA-3 treatment were normal.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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 December 22, 2026 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 3 months from start to step 3. Germination happens during step 3, in 14 days.

76% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. tuberiferum germination is stimulated by GA-3. Seeds germ. 70 GA-3(63% in 3rd w), 40-70 GA-3(76% in 2nd w),,and 70-40-70 GA-3(88% in 3rd w). As indicated the GA-3 was applied after the shift to 70. Untreated seeds germ. 70D-40-70D(15% in 2nd m), 40-70D(none), and 1% in outdoor treatment. Removing the seed coat had no effect. The seedlings from the GA-3 treatment were normal.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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 March 15, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C

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

63% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. tuberiferum germination is stimulated by GA-3. Seeds germ. 70 GA-3(63% in 3rd w), 40-70 GA-3(76% in 2nd w),,and 70-40-70 GA-3(88% in 3rd w). As indicated the GA-3 was applied after the shift to 70. Untreated seeds germ. 70D-40-70D(15% in 2nd m), 40-70D(none), and 1% in outdoor treatment. Removing the seed coat had no effect. The seedlings from the GA-3 treatment were normal.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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, 1993

Difficulty High Rated by us, not by the source.

Start around August 9, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 8, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

about 6 months from start to step 3. Germination happens during step 3, in 60 days.

15% germination in 60 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. tuberiferum germination is stimulated by GA-3. Seeds germ. 70 GA-3(63% in 3rd w), 40-70 GA-3(76% in 2nd w),,and 70-40-70 GA-3(88% in 3rd w). As indicated the GA-3 was applied after the shift to 70. Untreated seeds germ. 70D-40-70D(15% in 2nd m), 40-70D(none), and 1% in outdoor treatment. Removing the seed coat had no effect. The seedlings from the GA-3 treatment were normal.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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 6

DerivedN. C. Deno, 1993

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

  1. Sow outdoors and leave it

No stated waiting before sowing.

1% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. tuberiferum germination is stimulated by GA-3. Seeds germ. 70 GA-3(63% in 3rd w), 40-70 GA-3(76% in 2nd w),,and 70-40-70 GA-3(88% in 3rd w). As indicated the GA-3 was applied after the shift to 70. Untreated seeds germ. 70D-40-70D(15% in 2nd m), 40-70D(none), and 1% in outdoor treatment. Removing the seed coat had no effect. The seedlings from the GA-3 treatment were normal.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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