B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:9
Type of plant - perennial
Foliage: ............................old spines thatched
Thelocactus rinconensis ssp. nidulans
is included in the following B and T World Seeds flowering plant categories:
5: Cactus Seed List
43: Herbaceous Border Plant Seed List
62: Mexican Native and Introduced Plants
720: Fire Resistant Plants
Thelocactus rinconensis ssp. nidulans seeds will usually germinate in 5-180 days, even under good conditions germination may be erratic. Normally will only germinate with light so surface sow. Sow Thelocactus rinconensis ssp. nidulans seeds on the surface of a Peaty seed sowing mix at about 25°C.
Sand, and loam, with some sphagnum moss or coir (coconut fiber/dust) make a good mix for germinating cacti and similar seeds. The mix needs to be free-draining, and to be slightly water retentive. Surface sow the seeds and just cover with sand. Start germinating the seeds in shady (dark), humid conditions. As the seeds start to germinate, increase the light and decrease the humidity.