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Rosa alba

White Rose of York · White Rose

Family RosaceaeGenus Rosa

A loosely double creamy-white rose with golden stamens among dark green toothed leaves
FlowerS. RaeCC BY 2.0

About the plant

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

Habit
lianaPlants of the World Online
Flower
Cream-whiteRead from the photograph on this page
Native range
France, Hungary, Spain, SwitzerlandGBIF 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.

Worth knowing

  • The white rose of York is a hybrid of unknown parentage, grown in Europe since ancient times. It may first have been grown mainly for the sweet scent of its flowers. Wikipedia: Rosa × alba

Protocol

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    1/3 germinated in this phase.

Steps after step 5 run on after germination.

about 12 months from start to step 5. Germination happens during step 5, in 9 days.

33% germination in 9 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Rosa p. 58Public domain
Show the original text
Rosa (Rosaceae). Germinations are characterized by two features. First is that germinations begin after several cycles and continue over several years. Second is that light or GA-3 have no effect. Germination may occur in either 70D or 40, but when germination occurs at 70 it-is usually within a few days after the shift to 70. R. alba "Suavec^s" germ. 70D-40-70D-40-70D(1/3 on 9th d)-40-70D(1/3 in 3rd d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Rosa p. 58. 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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