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Phacelia bipinnatifida

Purple Phacelia · Fernleaf Phacelia · Forest Phacelia

Family BoraginaceaeGenus Phacelia

Lavender bell flowers with white centers and long curved stamens, among deeply lobed dark green leaves.
FlowerUser:HalpaughPublic domain

About the plant

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

The plant

Habit
Annual, Ground Cover, WildflowerExtension Gardener Plant Toolbox
Habit
annualPlants of the World Online
Height
1-3 ft30-90 cmExtension Gardener Plant Toolbox
Spread
1-3 ft30-90 cmExtension Gardener Plant Toolbox
Flower
Blue, Purple/LavenderExtension Gardener Plant Toolbox
Blooms
SpringExtension Gardener Plant Toolbox
Native range
Native to the lower 48 statesPLANTS Database
Hardiness zones
5-8Extension Gardener Plant Toolbox

Growing conditions

Sun
Dappled Sunlight; Deep shade; Partial ShadeExtension Gardener Plant Toolbox
Soil
Clay, High Organic Matter, Loam (Silt), Sand, Shallow RockyExtension Gardener Plant Toolbox
Soil pH
Acid (<6.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, Moist, Occasionally WetExtension Gardener Plant Toolbox

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

Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS.

This source reports two treatments. Both are shown.

Protocol 1

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.

33% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Phacelia p. 54Public domain
Show the original text
Phacelia (Hydrophyllaceae). P. bipinnatifida germ. 70 GA-3(3/9 in 4th w), J 70D(,1/12 in 3rd w), and none in 70L, 40-70D, or 40-70L. The 70D sample was carried through the 3 m at 70, 3 m at 40, and 2 w at 70D. After this it was treated with GA-3 whereupon 6/12 gernv in 1-5 w.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Phacelia p. 54. 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

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Phacelia p. 54Public domain
Show the original text
Phacelia (Hydrophyllaceae). P. bipinnatifida germ. 70 GA-3(3/9 in 4th w), J 70D(,1/12 in 3rd w), and none in 70L, 40-70D, or 40-70L. The 70D sample was carried through the 3 m at 70, 3 m at 40, and 2 w at 70D. After this it was treated with GA-3 whereupon 6/12 gernv in 1-5 w.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Phacelia p. 54. Quoted exactly. Every value on this card comes from this record; 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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