Mendel’s Gardens

Machaeranthera tanacetifolia

Tahoka Daisy · Tansyleaf Tansyaster · Tansy-aster

Family AsteraceaeGenus Machaeranthera

About the plant

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

The plant

Habit
Annual, Biennial, Forb/herb
Height
2.0 ft
Flower
Purple
Blooms
Late Spring
Native range
Canada, lower 48 states

Growing conditions

Sun
Shade tolerance: High
Moisture
Moisture use: Medium

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

Source: PLANTS Database — USDA NRCS.

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.

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

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

This source doesn't state how long.

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.