Gymnocalycium Horstii
Gymnocalycium Horstii
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Commonly Known as: Spider Cactus
Care Information: Some Gymnocalyciums are shade-seeking in the wild, among shrubs or grasses, while others grow completely exposed. Therefore, some will need light shading from the sun in the hottest months, but to overdo this will result in the loss of flowers.
The potting medium's balance should be sufficient to allow good drainage so that the plants do not sit in soggy soil for more than a day or two after watering.
Watering in the summer months, while the plants are growing well, can be frequent (weekly for small plants in small pots), but always allow the compost to dry out before rewatering. Watering in the winter months is unwise and certainly not necessary. The difficult times are spring and autumn.
Those species which produce offsets can be readily propagated by cuttings. Gymnocalycium seed germinates well when fresh and will keep for a few years if stored in cold conditions.
Scientific Classification:
Family: Cactaceae
SubFamily: Cactoideae
Tribe: Trichocereeae
Genus: Gymnocalycium
Origin: The native range of this species is from southern Brazil, eastern Paraguay, northeastern Argentina, to Uruguay. It occurs on rocky outcrops at elevations up to 980 feet (300 m).
Hardiness: USDA hardiness zones 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
References:
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