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Boykinia aconitifolia

Allegheny Brookfoam · Brook Saxifrage

Family SaxifragaceaeGenus Boykinia

A loose spray of small white five-petalled flowers with yellow-green centers on a wet rock face, above a lobed leaf
FlowerSesamehoneytartCC BY-SA 3.0

About the plant

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

Habit
perennialPlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
WhiteRead from the photograph on this page
Native range
Native to the lower 48 statesPLANTS Database

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; PLANTS Database — USDA NRCS; Read from the photograph on this page — Deno's Garden.

Worth knowing

  • Brook saxifrage, or Allegheny brookfoam, grows in wet woods and on the edges of ponds and lakes in the southeastern United States, from West Virginia to Alabama and Georgia, and flowers in summer. Wikipedia: Boykinia aconitifolia

This source reports 6 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

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

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

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

96% germination in 14–84 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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, 1998

Difficulty Moderate Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in March-May.

No stated waiting before sowing.

60% germination.

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

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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, 1998

Difficulty Moderate Rated by us, not by the source.

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

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

about 3 months from start to step 2. Germination happens during step 2, in 28 days.

40% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around March 8, 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 28 days to germinate.

40% germination in 14–28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around December 22, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

about 3 months from start to step 2. Germination happens during step 2, in 14 days.

30% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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, 1998

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

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

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 12 months from start to sowing. Then 28 days to germinate.

5% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Boykinia p. 19Public domain
Show the original text
Boykinia (Saxifragaceae). B. aconitifolia germ. 70D(none), 70L(96% in 2-12 w), 70 GA-3(40% in 2-4 w), 40-70D(30% in 2nd w), 40-70L(40% in 4th w), and OT(60% in March-May). Seeds DS 1 y germ. 70L(5% in 4th w) and 70D(none) showing that nearly all had died.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Boykinia p. 19. 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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