everything I read about vandas says they're heavy feeders and like growth hormones (at least while they're actively growing, which is year round down south but only half the year up here on the NY windowsill).
I've used superthrive in the past, but only have KLN now. a few drops in a 32 oz spray bottle when I remember (I spray the roots heavily, and rarely spray the leaves). I can't be sure it definitely helps, but suspect it may assist in root development (although they get plenty of fertilizer too).




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(just kidding)

