thanks for the input guys! Ray, I have had the plants for some time, no change in environment, haven't been repotted (the Plectrelminctus grows on a slab) They all grow in the same tunnel which is covered with 50% shade cloth and clear plastic (to keep bugs & rain out) our climate is sub tropical (winter not below 10 celcius) I keep the humidity at 60%, feed weekly (all plants get the same feeding. One week high nitrogen, next week high potasium, once a month I might add some Superthrive to the mix. Someone suggested it could possibly be caused by insecticides? thanks for the help.
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