B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Crataegus douglasii is cold hardy
USDA Zone:5 -20° to -10°F (-29° to -23.5°C)
|Type of plant - tree
Flower or inflorescence:
glab. 10-12 fld. corymb
obov., 4-10cm. long
|Height, in meters: 10
Height, in feet: 33.00
|Crataegus douglasii sales history
Synonyms (alternative names) for Crataegus douglasii:
|Crataegus punctata var. brevis, Crataegus rivularis,|
Common names for Crataegus douglasii:
|Black Hawthorn, Douglas Hawthorn, River Hawthorn, Thorn Bush,|
is included in the following
B and T World Seeds flowering plant categories.
|29||: Temperate Forest and Woodland Tree and Shrub Seed List|
|30||: Exotic and Other Fruit and Nut Tree and Shrub List|
|76||: Californian Native Plant Seed List|
|88||: Natives of U.S.North West|
|131||: Toxic Plants|
|Some of the deadliest known poisons are found in plants. Some major food plants, eaten by millions of people every day, have toxic parts.|
|185||: Plant Species whose germination is improved by Smoke|
|"Smoke" contains a butenolide compound produced by certain plants when heated, it speeds up or starts the germination of seeds from many different genera.|
|719||: North American Native Ethnobotanicals|
|Including medicinal, dye, fiber, food, construction, ritual|
Some knowledge about growing from seed is necessary to germinate even the easiest seeds.
Most seeds require humidity to germinate, even desert plants like
require that their growing medium remains moist until germination.|
Most seeds require oxygen to germinate, if buried too deep in their growing medium, or if the medium is too wet,
the seeds may not get the oxygen they require.
Crataegus douglasii seeds will usually germinate in 180-730 days, even under good conditions germination may be erratic.
(3-5 months at 70'F then 3 months in frig)