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B and T World Seeds' reference number:
The average, annual, minimum temperature zone where Penstemon whippleanus is cold hardy
|Type of plant - perennial
Flower or inflorescence:
PURPLE cor. to 3cm. long, in long infl.. June - July
lance. to obl.-lance.
|Height, in meters: 0.6
Height, in feet: 1.98
|Penstemon whippleanus sales history
Synonyms (alternative names) for Penstemon whippleanus:
Common names for Penstemon whippleanus:
|Chocolate Drop, Dusky Beardtongue, Whipple's Penstemon,|
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|
|57||: Arid and Dry Condition Plant Seed List|
|76||: Californian Native Plant Seed List|
|85||: Natives of U.S.South West (Arizona Texas New Mexico)|
|94||: Natives of Rocky Mountain Area U.S.A.|
|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.|
|700||: Humming Bird Nectar Plants|
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.
Penstemon whippleanus seeds will usually germinate in 18-21 days.
Penstemon whippleanus seeds need to be "overwintered" before they will germinate.
Stratification; cold treatment or vernalization. Seeds of some species need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".