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Penstemon whippleanus

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Penstemon whippleanus
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1 packet for 14 Euros
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Penstemon whippleanus
1 gram for 27 Euros
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Penstemon whippleanus
10 gram for 210 Euros
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Penstemon whippleanus
100 gram for 1660 Euros
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Penstemon whippleanus

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 4306

The average, annual, minimum temperature zone where Penstemon whippleanus is cold hardy
USDA Zone:4-
Type of plant - perennial
Flower or inflorescence: PURPLE cor. to 3cm. long, in long infl.. June - July
Fruit: capsule
Foliage: lance. to obl.-lance.
Height, in meters: 0.6
Height, in feet: 1.98
Penstemon whippleanus sales history

Synonyms (alternative names) for Penstemon whippleanus:
Penstemon arizonicus, 

Common names for Penstemon whippleanus:

Chocolate Drop,  Dusky Beardtongue,  Whipple's Penstemon, 


Penstemon whippleanus 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.
564:  Plantaginaceae
618:  Scrophulariaceae
700:   Humming Bird Nectar Plants


Happier and Healthier Plants, Naturally

plant-fungus communities, for improved nutrition, and disease and drought resistance.


Germination guide for Penstemon whippleanus

These notes are a general guide, it is recommended to check specialist literature for some of the more unusual seeds in our lists.
Seed Germination Theory and Practice by Professor Norman C. Deno
Some knowledge about growing from seed is necessary to germinate even the easiest seeds. Most seeds require humidity to germinate, even desert plants like Welwitschia mirabilis 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.
Some seeds need to be in the light (surface sown) or in the dark (sown deep enough to receive little or no light) to germinate. A rule of thumb is to cover the seeds their own width deep in the growing medium, but some seeds prefer to be sown much deeper, and some fairly large seeds like to be surface sown (or higher).
Many seeds germinate best at certain temperatures, some will germinate at a comparatively wide range of temperatures, yet others need fluctuating temperatures.
Almost all seeds are waiting in a dormant state for some outside stimulus to break their dormancy, some just need sufficiently high ambiant humidity, others need scarification, vernalization or to be passed through the intestines of an animal.

Penstemon whippleanus seeds will usually germinate in 18-21 days.
Normally will only germinate with light so surface sow. Sow Penstemon whippleanus seeds about 1mm deep in a Well drained seed sowing mix at about 15°C.

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".
Seed Germination Theory and Practice by Professor Norman C. Deno


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