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bonsaiTALK Master Craftsman
Join Date: Apr-2006
Location: Tiny island off the SW coast of Nova Scotia - paradise!
Country: Canada
Posts: 504
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Black tips (that go nowhere) is usually a sign of rot, or that the plant has been out in the cold. You need to repot, cut away black, slimy bad roots to clean ones, repot with a fast draining gritty bonsai mix and be very careful about how often you're watering. You might also want to add some house plant fungicide to the water after you repot.
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