B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Othonna retrorsa is cold hardy
USDA Zone:9 20° to 30°F (-6.5° to -1°C)
|Type of plant - perennial
Flower or inflorescence:
YELLOW, on long stalks
forms cushion, old lvs. thatch
|Othonna retrorsa sales history
is included in the following
B and T World Seeds flowering plant categories.
|9||: Alpine and Rock Garden Seed List (Hardy and Tender)|
|37||: South African Native and Introduced Plants|
|43||: Herbaceous Border Plant Seed List|
|130||: Ground cover Plant Seed List (see also List 133)|
|162||: Cushion Or Hummock Plant Seed List (Small and Larger)|
|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.
Othonna retrorsa seeds will usually germinate in 30-90 days, even under good conditions germination may be erratic.