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Euphorbia horrida


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Euphorbia horrida

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 401359

The average, annual, minimum temperature zone where Euphorbia horrida is cold hardy
USDA Zone:9 20° to 30°F   (-6.5° to -1°C)
Type of plant - shrub
Flower or inflorescence: cyathia 3 per cyme, glands PURPLE, dioecious
Fruit: (sow in spring)
Foliage: 12-16 ribbed spiny branches to 10cm. dia., from base
Height, in meters: 1.5
Height, in feet: 4.95
Euphorbia horrida seeds may be subject to seasonal availability
Parts of Euphorbia horrida are considered toxic.

Common names for Euphorbia horrida:

African Milk Barrel, 


Euphorbia horrida is included in the following
B and T World Seeds flowering plant categories.

26:   Succulent Plant Seed List
31:   House and Container Plant Seed List
37:   South African Native and Introduced Plants
40:   Shrub Seed List, Hardy and Tender
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.
190:   Trees and Shrubs For Mediterranean Climates
386:  Euphorbiaceae
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 Euphorbia horrida

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.

Euphorbia horrida seeds will usually germinate in 10-15 days, even under good conditions germination may be erratic.
Sow Euphorbia horrida seeds about 6mm deep in a Well drained seed sowing mix at about 25°C.

Pre chill HP for 7 day. Sow in lime-free compost.


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