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Penstemon spectabilis

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Penstemon spectabilis
We do not know how many seeds there will be in a packet !
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examples '200 seeds' or '0.50 gram', not as packet.
1 packet for 8 Euros
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Penstemon spectabilis
1 gram for 10 Euros
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Penstemon spectabilis
10 gram for 72 Euros
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Penstemon spectabilis
100 gram for 525 Euros
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Penstemon spectabilis

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 25117

The average, annual, minimum temperature zone where Penstemon spectabilis is cold hardy
USDA Zone:7 0° to 10°F   (-17.5° to -12.5°C)
Type of plant - shrub
Flower or inflorescence: LAVENDER-PURPLE - BLUE, WHITE inside, panicles 15-40cm. long, first year
Fruit: ...(vernalise or stratify)
Foliage: ovate to 10x5cm., GREY-GREEN
Height, in meters: 1.2
Height, in feet: 3.96
Penstemon spectabilis sales history

Common names for Penstemon spectabilis:

Royal Beard Tongue,  Royal Penstemon,  Showy Penstemon, 


Penstemon spectabilis 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
76:   Californian Native Plant Seed List
85:   Natives of U.S.South West (Arizona Texas New Mexico)
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
698:   First Year Flowering Perennials
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 spectabilis

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

Penstemon spectabilis 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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