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Eutrochium purpureum

Sweet Joe Pye Weed · Sweet-scented Joe Pye Weed · Purple Joe Pye Weed

Family AsteraceaeGenus Eutrochium

Also published as Eupatorium purpureum. You are in the right place.

A broad domed head of dusty pink thread-like florets on a dark red stem, standing beside a green pond with waterlilies.
FlowerMichael KramerCC 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
Flower
Pale pinkish, purplishFlora of North America

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 North America — Flora of North America Editorial Committee.

Worth knowing

Protocol

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 3 months from start to step 2. Germination happens during step 2, in 4 days.

98% germination in 2–4 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Eupatorium p. 142Public domain
Show the original text
Eupatorium (Asteraceae). Seed counts were difficult so the percent germinations are calculated on the basis that total germination was 100%. The 40-70 germination pattern found in E. purpureum germ. 40(2%)-70(98% in 2-4 d) using fresh seed or seed DS 6 m at 70 or 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Eupatorium p. 142. 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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