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Rhododendron yakushimanum

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Approximately 3555.00 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.

1 packet for 25 Euros
in stock *     Rhododendron yakushimanum     * in stock

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are available for immediate shipping
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 '15 gram', not as packet.




1.75 gram for 41 Euros
in stock *     Rhododendron yakushimanum     * in stock

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7 gram for 120 Euros
in stock *     Rhododendron yakushimanum     * in stock

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Rhododendron yakushimanum
28 gram for 463 Euros
available for preorder


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Rhododendron yakushimanum

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 14679

The average, annual, minimum temperature zone where Rhododendron yakushimanum is cold hardy
USDA Zone:7 0° to 10°F   (-17.5° to -12.5°C)
Type of plant - evergreen shrub
Flower or inflorescence: PINK, darker spots, 5-7 lobed
Foliage: ell.-obl., 8-14cm. long
Height, in meters: 2.5
Height, in feet: 8.25
Rhododendron yakushimanum sales history
Parts of Rhododendron yakushimanum are considered toxic.

Synonyms (alternative names) for Rhododendron yakushimanum:
R.degronianum ssp yakushimanum, Rhododendron degronianum ssp y, Rhododendron degronianum subsp, Rhododendron metternichii subs, Rhododendron metternichii var., 

Common names for Rhododendron yakushimanum:

Rhododendron de Yakushima,  Yakushima Rhododendron, 


Rhododendron yakushimanum 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.
10:   Rhododendron and Azalea Species and Hybrid Seed List
50:   Japanese Native and Introduced Plants
131:   Toxic Plants
Some of the deadliest known poisons are found in plants. Some major food plants, eaten by millions of people every day, have toxic parts.
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.
379:  Ericaceae


Happier and Healthier Plants, Naturally

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


Germination guide for Rhododendron yakushimanum

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.

Rhododendron yakushimanum seeds will usually germinate in 50-90 days, even under good conditions germination may be erratic.
Normally will only germinate with light so surface sow. Sow Rhododendron yakushimanum seeds on the surface of a Acid Peat seed sowing mix at about 15°C.

Rhododendron yakushimanum seeds will mostly germinate as the weather warms up in Spring, some may germinate during the Summer or Autumn but are more likely to stay dormant until the following Spring.

Keep shaded from direct sun.


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