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Seed sown early in the year produces seedlings that benefit from a longer growing period. [112] Seed is sown in a moist growing medium and then kept in a covered environment, until 7–10 days after germination, to avoid drying out. [113] A very wet growing medium can cause both seeds and seedlings to rot. [114]
Pediocactus simpsonii, known by the common names mountain cactus, snowball cactus, and mountain ball cactus, is a relatively common cactus that has adapted to survive in cold and dry environments in high elevation areas of the western United States. It can be found at higher elevations than any other cactus in North America.
Sclerocactus seeds are difficult to germinate as they contain inhibitors, and require cold stratification, prolonged soaking, or scarification of the seeds to trigger germination. Seeds of members of this genus can take up to three years to germinate in some cases if not scarified or subjected to repeated freeze-thaw cycles in the presence of ...
The dark brown or black seeds can be relatively large for the size of cactus and they germinate readily. Reproduction is nearly always from seed, since the plant rarely produces plantlets. The seed should be put in a sand and compost mixture, kept moist, maintained at a temperature of 21 °C and placed in a shady position.
Seeds are dispersed from the fruits of mature plants. While ants occasionally take fruit to their mounds, leaving seeds above to sprout - feeding by rodents and lagomorphs are the most common means of dispersal. New sprouts of the cactus thrive under the shade of the fourwing saltbush, which provides protection from animals and desiccation.
All seeds have an outer coat that protects the plant embryo inside the seed. Some seeds have a thick exterior coat to shield that tiny plant inside from dryness, injury, fire, an animal's ...