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Rehmannia piasezkii

Chinese Foxglove

Family OrobanchaceaeGenus Rehmannia

Also published as Rehmannia elata. You are in the right place.

A large pink trumpet flower with a spreading lower lip, its throat marked with crimson spots and yellow ridges, on a hairy stem.
FlowerSalicynaCC 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
Purple-redFlora of China

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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.).

Worth knowing

  • Its pink tubular flowers look a little like foxgloves, hence the name Chinese foxglove, but it is not closely related to the true foxgloves. Wikipedia: Rehmannia elata

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

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around March 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 22, 2025.

  1. Dry storage

    Duration: 730 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 2 years from start to sowing. Then 14 days to germinate.

30% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Rehmannia p. 57Public domain
Show the original text
Rehmannia (Scrophulariaceae). R. elata DS 2 y germ. 70D(30% in 2nd w):
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Rehmannia p. 57. 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 29, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 7 days to germinate.

100% germination in 7 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Rehmannia p. 70Public domain
Show the original text
Rehmannia (Scrophulariaceae). R. elata germ. 70D(90% in 6th d) and 70L(100% on 7th d). All rotted in 70 GA-3. Seeds DS 1 y germ. 70D(70% in 6-16 d) showing both a decline in percent germination and a slowing of rate.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Rehmannia 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 Low Rated by us, not by the source.

Start around March 30, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 6 days to germinate.

90% germination in 6 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Rehmannia p. 70Public domain
Show the original text
Rehmannia (Scrophulariaceae). R. elata germ. 70D(90% in 6th d) and 70L(100% on 7th d). All rotted in 70 GA-3. Seeds DS 1 y germ. 70D(70% in 6-16 d) showing both a decline in percent germination and a slowing of rate.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Rehmannia 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 Low Rated by us, not by the source.

Start around March 21, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 20, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 12 months from start to sowing. Then 16 days to germinate.

70% germination in 6–16 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Rehmannia p. 70Public domain
Show the original text
Rehmannia (Scrophulariaceae). R. elata germ. 70D(90% in 6th d) and 70L(100% on 7th d). All rotted in 70 GA-3. Seeds DS 1 y germ. 70D(70% in 6-16 d) showing both a decline in percent germination and a slowing of rate.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Rehmannia 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.

Germination trials

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

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