When you water, be sure to water the roots until the white part turns green. After watering, fertilize with a weak solution (1 tsp/gal) of a balanced fertilizer. With mounted culture, the fertilizer is especially important. Since you are soaking the roots at each watering, you can fertilize after each watering without endangering the plant. The watering flushes away all the excess salts. That said, if you need to water twice a day during the summer, you would only fertilize after the morning watering.
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