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Helianthus laetiflorus

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Approximately 140.00 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.

0.16 gram for 8 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




0.32 gram for 10 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




0.63 gram for 13 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




Helianthus laetiflorus
We do not know how many seeds there will be in a packet !
If we know the quantity of seeds, we list the quantity as:
examples '200 seeds' or '0.50 gram', not as packet.
1 packet for 14 Euros
available for preorder


1.25 gram for 19 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




1 gram for 21 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




2.50 gram for 32 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




5 gram for 57 Euros
in stock *     Helianthus laetiflorus     * in stock

Stock items purchased using the shopping cart
are available for immediate shipping




Helianthus laetiflorus
10 gram for 107 Euros
available for preorder


Helianthus laetiflorus
100 gram for 834 Euros
available for preorder


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Helianthus laetiflorus

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 65755

The average, annual, minimum temperature zone where Helianthus laetiflorus is cold hardy
USDA Zone:4 -30° to -20°F   (-34.5° to -29°C)
Type of plant - perennial
Flower or inflorescence: bright YELLOW, capitulae 10cm. dia.
Fruit: cypsela
Foliage: lance.-ov., to 30cm. long back of border
Height, in meters: 2
Height, in feet: 6.60
Helianthus laetiflorus sales history

Synonyms (alternative names) for Helianthus laetiflorus:
Helianthus rigidus, 

Common names for Helianthus laetiflorus:

Showy Sunflower, 


Helianthus laetiflorus 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.
6:   Bulbous and Rhizomatous Plant Seed List
43:   Herbaceous Border Plant Seed List
44:   Cut flowers Commercial and other Recommended Varieties
87:   Natives of Central U.S.A.
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
719:   North American Native Ethnobotanicals
Including medicinal, dye, fiber, food, construction, ritual
720:   Fire Resistant Plants
Different classes of resistance: some grow back, some don't burn, a few have highly inflammable leaves that leave the rest of the plant intact, some trees don't have lower branches.


Happier and Healthier Plants, Naturally

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


Germination guide for Helianthus laetiflorus

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.

Helianthus laetiflorus seeds will usually germinate in 10-14 days.
Sow Helianthus laetiflorus seeds about 6mm deep in a Peaty seed sowing mix at about 20-30°C.

Can be sown in situ.


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