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Fertilizing in a self water pot?

2 months ago
last modified: 2 months ago

How do I fertilize a plant in a self watering pot? It’s like a glazed ceramic pot on the outside, with a more porous terracotta pot on the inside. There is no drainage hole or wick. It currently houses a very leggy fittonia. Thinking of taking cuttings of the tops.

I feel like liquid fertilizer will build up salts, and I cannot flush it since there is nowhere for the extra water to go. Should I use granular fertilizer or will that also build up?

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