Cacti - Knowledgebase Question

Hudson, KY
Question by brendasrange
April 19, 1999
My cacti is turning black at the bottom. I just transplanted it but can't figure out why its turning black. Could you please help?


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Answer from NGA
April 19, 1999

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The usual cause for black areas on the bottom of cacti (basal rot) is overwet conditions in the winter. Transplanting probably had nothing to do with the sudden appearance of the symptoms. Unfortunately, there's no way to save the diseased bottom of the cacti. If your cacti has an upper stem, detach and pot it up. Then sprinkle a layer of decorative pebbles over the soil surface to keep wet soil from touching the base of the plant. Water only during the spring, summer and autumn months, allowing the soil to remain dry during the winter.

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