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B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Rhododendron smirnowii is cold hardy
USDA Zone:4 -30° to -20°F (-34.5° to -29°C)
|Type of plant - shrub
Flower or inflorescence:
oblanceo., 7-14cm. long
|Height, in meters: 4
Height, in feet: 13.20
|Rhododendron smirnowii sales history
| Parts of Rhododendron smirnowii are considered toxic.
is included in the following
B and T World Seeds flowering plant categories.
|10||: Rhododendron and Azalea Species and Hybrid Seed List|
|40||: Shrub Seed List, Hardy and Tender|
|72||: Russian Native and Introduced Plants (Central)|
|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.|
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.
Rhododendron smirnowii seeds will usually germinate in 50-90 days, even under good conditions germination may be erratic.
Rhododendron smirnowii seeds will mostly germinate as the weather warms up in Spring, some may germinate during the Summer or Autumn but are more likely to stay dormant until the following Spring.
Keep shaded from direct sun.