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Heracleum sosnowskyi

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Heracleum sosnowskyi

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 408444

Type of plant - perennial
Flower or inflorescence: large multi-headed inflor., WHITE
Foliage: large broad, spreading
Height, in meters: 4
Height, in feet: 13.20
Heracleum sosnowskyi sales history
Parts of Heracleum sosnowskyi are considered toxic.

Heracleum sosnowskyi is included in the following
B and T World Seeds flowering plant categories.

2:   Wants
We are looking for seeds from this plant, if you know where we can find seeds or would like to be told when we have a source, please let me know.
43:   Herbaceous Border Plant Seed List
48:   Polish Native and Introduced Plants
73:   East Asian Native and Introduced Plants
102:   Eastern European Native Plant Seed List
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.
231:  Apiaceae
706:  Umbelliferae

Happier and Healthier Plants, Naturally

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

Germination guide for Heracleum sosnowskyi

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.

Heracleum sosnowskyi seeds will usually germinate in 30-90 days.
Sow Heracleum sosnowskyi seeds about 6mm deep in a Well drained seed sowing mix.

Heracleum sosnowskyi 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.

Sow in situ.

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