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Asperula arvensis

Blue Woodruff · Field Woodruff

Family RubiaceaeGenus Asperula

A cluster of small pale blue tubular flowers, one opened into four lobes, held in a whorl of narrow hairy leaves
FlowerKrzysztof Ziarnek, KenraizCC BY-SA 4.0

About the plant

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

Habit
annualPlants of the World Online
Habit
Annual, Forb/herbPLANTS Database
Flower
Whitish, redFlora of Pakistan
Native range
Albania, Algeria, Austria, Baleares, Belgium, Bulgaria and elsewhereGBIF 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; PLANTS Database — USDA NRCS; Flora of Pakistan — S. I. Ali and M. Qaiser (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around December 1, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2, in 35 days.

91% germination in 14–35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Asperula p. 104Public domain
Show the original text
Asperula (Rubiaceae). Larger samples are needed. A. arvensis germ. 40(3/4 in 3rd w) and 70-40(10/11 in 2-5 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Asperula p. 104. 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 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 21 days.

75% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Asperula p. 104Public domain
Show the original text
Asperula (Rubiaceae). Larger samples are needed. A. arvensis germ. 40(3/4 in 3rd w) and 70-40(10/11 in 2-5 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Asperula p. 104. 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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