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Machaeranthera tanacetifolia

Tahoka Daisy · Tansyleaf Tansyaster · Tansy-aster

Family AsteraceaeGenus Machaeranthera

A violet daisy with narrow rays around a yellow center
FlowerStickpenPublic domain

About the plant

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

The plant

Habit
annualPlants of the World Online
Habit
Annual, Biennial, Forb/herbPLANTS Database
Height
2.0 ft60 cmPLANTS Database
Flower
PurplePLANTS Database
Blooms
Late SpringPLANTS Database
Native range
Alberta, Arizona, California, Colorado, Kansas, Mexico Northeast and elsewhereGBIF Backbone Taxonomy

Growing conditions

Sun
Shade tolerance: HighPLANTS Database
Soil
Adapted to medium textured soilsPLANTS Database
Soil pH
6.5-8.5PLANTS Database
Moisture
Moisture use: MediumPLANTS Database
Watering
Drought tolerance: MediumPLANTS Database

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; PLANTS Database — USDA NRCS; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 26, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 10 days to germinate.

20% germination in 3–10 days.

20-30%. Fresh seed or six months dry at 70 or 40 -- all the same.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, MachaerantheraPublic domain
Show the original text
Machaeranthera (Asteraceae). M. tanacetifolia germ. 70(20-30% in 3-10 d) with either fresh seed or seed DS 6 m at 70 or 40. Seed sown at 40 gave lower germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Machaeranthera. 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

  1. Cold moist stratification

    Temperature: 40°F 4°C

    Lower than sowing at 70.

Germination happens during step 1.

Deno says only that sowing at 40 gave lower germination. He gives no figure.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, MachaerantheraPublic domain
Show the original text
Machaeranthera (Asteraceae). M. tanacetifolia germ. 70(20-30% in 3-10 d) with either fresh seed or seed DS 6 m at 70 or 40. Seed sown at 40 gave lower germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Machaeranthera. 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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