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Opuntia macrocentra

Opuntia macrocentra
The number of seeds in a packet changes, and many of our growers/collectors do not know how many seeds there will be in a packet !
If we know the quantity of seeds in a packet, we list the quantity as: examples '200 seeds' or '0.50 gram', not as packet.
If the quantity is listed as packet, it is because we don't know the quantity of seeds contained.

Opuntia macrocentra

Opuntia macrocentra

Opuntia macrocentra

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B and T World Seeds' reference number: 9496

USDA average, annual, minimum temperature Zone:9
Type of plant - shrub to tree
Flower or inflorescence: YELLOW and RED
Fruit: RED-PURPLE,2-4cm.lg.
Foliage: PURPLISH segs, BLACK spines
Height, in meters: 2

Elements of Structural and Systematic Botany

Synonyms (alternative names) for Opuntia macrocentra: Opuntia violacea,  Opuntia violacea v macrocentra, 

Common names for Opuntia macrocentra: Black Spine Prickly-pear,  Blunt Spine Prickly-pear,  Long Spine Prickly-pear,  Martin's Blunt Spine Prickly-pear,  Purple Prickly Pear,  Purple Prickly-pear,  Reddish-purple Prickly-pear, 

Opuntia macrocentra is included in the following
B and T World Seeds flowering plant categories.

5:  *Cactus Seed List
See also *Succulent Plant Seed List
30:  *Exotic and Other Fruit and Nut Tree and Shrub List
62:  *Mexican Native and Introduced Plants
85:  *Natives of U.S.South West (Arizona Texas New Mexico)
190:  *Trees and Shrubs For Mediterranean Climates
281:  Cactaceae

Happier and Healthier Plants, Naturally

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

Germination guide for Opuntia macrocentra

These notes are a general guide, it is recommended to check specialist literature for some of the more unusual seeds in our lists. 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.

Opuntia macrocentra seeds will usually germinate in 5-180 days, even under good conditions germination may be erratic. Normally will only germinate with light, GA-3 may promote germination - even in the dark. Sow Opuntia macrocentra seeds on the surface of a Peaty seed sowing mix at about 25°C.

Cacti

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