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Approximately 65.00 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Centaurea ruthenica is cold hardy
USDA Zone:3 -40° to -30°F (-40° to -34.5°C)
|Type of plant - perennial
Flower or inflorescence:
dark GREEN, pinnatifid
|Height, in meters: 1.5
Height, in feet: 4.95
|Centaurea ruthenica sales history
Common names for Centaurea ruthenica:
|Russian Knapweed, Star Thistle,|
is included in the following
B and T World Seeds flowering plant categories.
|43||: Herbaceous Border Plant Seed List|
|44||: Cut flowers Commercial and other Recommended Varieties|
|45||: Bee and Butterfly Attracting also Honey and Pollen Plant Seeds|
|48||: Polish Native and Introduced Plants|
|102||: Eastern European Native Plant Seed List|
|118||: Siberian Native Plant Seed List|
|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.
Centaurea ruthenica seeds will usually germinate in 7-14 days.