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Rebutia sp. 6/2/21
This genus flowers reliably starting in the spring and, in several species, into the summer. Full sun retards flowering after the first flush. Partial shade seems to allow longish flowering. That is, grow them for three hours before local noon in an east exposure or three hours after local noon in a west exposure. Or do any three hours within the interval of three hours before local noon and three hours after local noon . (20/48)