Approximately 1536.00 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
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B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Rudbeckia subtomentosa is cold hardy
USDA Zone:5 -20° to -10°F (-29° to -23.5°C)
|Type of plant - perennial
Flower or inflorescence:
YELLOW, PURPLE-BROWN centre, 8cm. cap.
(stratify 8 weeks te germ. in 2 weeks warm, or GA-3, to germ. in 2-8 weeks)
ovate, to 13cm., tern.....likes moist soil, not wet
|Height, in meters: 1.3
Height, in feet: 4.29
|Rudbeckia subtomentosa sales history
Common names for Rudbeckia subtomentosa:
|Sweet Black-eyed Susan, Sweet Coneflower,|
is included in the following
B and T World Seeds flowering plant categories.
|43||: Herbaceous Border Plant Seed List|
|55||: Fragrant or Aromatic Flower or Foliage Plant Seeds|
|87||: Natives of Central U.S.A.|
|89||: Natives of U.S.South East|
|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.
Rudbeckia subtomentosa seeds will usually germinate in 5-21 days.
Fulgida see No. 14 (Pre-chill for 2 weeks).