Mendel’s Gardens

Weigela florida

Weigela · Oldfashioned Weigela

Family CaprifoliaceaeGenus Weigela

About the plant

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

The plant

Habit
Deciduous shrubPlant Finder
Habit
Perennial, ShrubPLANTS Database
Height
6-10 ftPlant Finder
Spread
9-12 ftPlant Finder
Flower
Showy; rose pinkPlant Finder
Blooms
April to JunePlant Finder
Native range
Northern China, Korea, JapanPlant Finder
Hardiness zones
4-8Plant Finder

Growing conditions

Sun
Full sun
Soil
Average, medium moisture, well-drained; tolerates clay
Watering
Medium

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

Sources: Plant Finder — Missouri Botanical Garden; PLANTS Database — USDA NRCS.

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 14 days to germinate.

95% germination in 5–14 days.

GA-3 beats the light: 95% against 82%, and buried.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WeigelaPublic domain
Show the original text
Welgelia (Caprifoliaceae). W. florida required light or GA-3. Seeds germ. 70L(82% in 5-18 d), 70D GA-3(95% in 5-14 d), and 70D(3%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Weigela. 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 Low Rated by us, not by the source.

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

  1. Sow on the surface — do not cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 18 days to germinate.

82% germination in 5–18 days.

82% on the surface in light, with no chemistry needed.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WeigelaPublic domain
Show the original text
Welgelia (Caprifoliaceae). W. florida required light or GA-3. Seeds germ. 70L(82% in 5-18 d), 70D GA-3(95% in 5-14 d), and 70D(3%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Weigela. 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 Very high Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

3% germination.

3%. Deno's own summary: it required light or GA-3.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WeigelaPublic domain
Show the original text
Welgelia (Caprifoliaceae). W. florida required light or GA-3. Seeds germ. 70L(82% in 5-18 d), 70D GA-3(95% in 5-14 d), and 70D(3%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Weigela. 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.