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B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Onosma polyphyllum is cold hardy
|Type of plant - perennial
Flower or inflorescence:
SILVERY lanceolate, forms loose cushions
|Height, in meters: 0.25
Height, in feet: 0.83
|Onosma polyphyllum sales history
Common names for Onosma polyphyllum:
is included in the following
B and T World Seeds flowering plant categories.
|9||: Alpine and Rock Garden Seed List (Hardy and Tender)|
|43||: Herbaceous Border Plant Seed List|
|162||: Cushion Or Hummock Plant Seed List (Small and Larger)|
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.
Onosma polyphyllum seeds will usually germinate in 30-60 days.