Tanacetum dolichophyllum
Long-leaved Tansy
Also published as Hippolytia dolichophylla, Hippolytia longifolia. You are in the right place.
About the plant
What it is and where it grows — not part of any germination protocol.
- Habit
- perennialPlants of the World Online
- Flower
- Golden yellowRead from the photograph on this page
- Note
- WFO and POWO both move this species to Hippolytia but disagree on the epithet, so Deno's name stands hereGBIF Backbone Taxonomy
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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Low
Start around March 29, 2027 for a May 3 last frost.
Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing. Then 7 days to germinate.
100% germination — first up on day 3, then 30% a day.
Every seed. First up on the third day, then 30% of the packet a day after that.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Low
Start around December 30, 2026 for a May 3 last frost.
Cold moist stratification
Duration: 90 daysTemperature: 40°F 4°C
Deno gives no length for this period; three months is his standard cycle.
Warm moist stratification
Temperature: 70°F 21°C
about 3 months from start to step 2. Germination happens during step 2, in 6 days.
100% germination in 2–6 days.
The cold changes nothing but the calendar. Still every seed.
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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