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Centaurea cyanus Boy Black tall double

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 69926

The average, annual, minimum temperature zone where Centaurea cyanus Boy Black tall double is cold hardy
USDA Zone:6 -10° to 0°F   (-23.5° to -18°C)
Type of plant - annual
Flower or inflorescence: deep MAROON, double
Height, in meters: 1
Height, in feet: 3.30
Centaurea cyanus Boy Black tall double sales history


Centaurea cyanus Boy Black tall double is included in the following
B and T World Seeds flowering plant categories.

1:   Stock list
Our stock changes almost every day, with seeds arriving and being shipped all over the world.
We only stock long lived seeds, except for a few species that are always in demand.
Seeds that are not in stock are acquired fresh when ordered.
19:   Everlasting and Dried Flower Seeds Australian and Other
36:   Herb Seed List Culinary Medicinal Dye and Aromatic
Not all medicinal, dye or aromatic plants are edible, some are toxic if eaten and others are dangerous if applied to the skin. Please check uses for plants.
44:   Cut flowers Commercial and other Recommended Varieties
45:   Bee and Butterfly Attracting also Honey and Pollen Plant Seeds
53:   Bedding Plant Seed List
160:   Salad Vegetable Seed List
161:   Edible Flowers
Some flowers are poisonous if not cooked. Some are only edible while in bud. Identify and correctly prepare all flowers before eating. Do not eat flowers that have been sprayed with weedkiller or other chemicals.
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
952:   Wholesale Selection


Happier and Healthier Plants, Naturally

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


Germination guide for Centaurea cyanus Boy Black tall double

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


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