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Centaurea calcitrapa


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Centaurea calcitrapa

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 64428

The average, annual, minimum temperature zone where Centaurea calcitrapa is cold hardy
USDA Zone:6 -10° to 0°F   (-23.5° to -18°C)
Type of plant - perennial
Flower or inflorescence: RED-PURPLE, 8-10mm. dia.
Foliage: pinn.-lobed, pointed
Centaurea calcitrapa sales history

Common names for Centaurea calcitrapa:

Abre Puno,  Cardo Estrelado,  Centauree chausse-trape,  Ippofesto,  Purple Star Thistle,  Red Star Thistle,  Red Star-thistle,  Red Star-thistle,  Star Thistle,  Stern-Flockenblume, 


Centaurea calcitrapa is included in the following
B and T World Seeds flowering plant categories.

12:   British Native Wild Flowers Shrubs and Trees
43:   Herbaceous Border Plant Seed List
45:   Bee and Butterfly Attracting also Honey and Pollen Plant Seeds
103:   Western European Native and Introduced Plants
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.
246:  Asteraceae
708:  Compositae


Happier and Healthier Plants, Naturally

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


Germination guide for Centaurea calcitrapa

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.

Centaurea calcitrapa seeds will usually germinate in 7-14 days.
Normally germinates in the dark. Sow Centaurea calcitrapa seeds about 2mm deep in a Well drained seed sowing mix at about 15-20°C.


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