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This is a discussion on Encyclia radiata finally blooms - but I don't know.... within the Cattleyas, Vandas, Dendrobiums IN BLOOM forums, part of the Orchid Photography category; Originally Posted by catttan I've given up on it....it is just too robust to be ...
Maura this is a beautiful bloom and also really really glad you're back...
Very fine flowers Maura. I also would not be to worried about those spots. AL
Assuming you have a meter - surely you have a meter Maura ? - try this . Take some plain water - distilled, non-ionic or rain- whatever; measure the EC and the pH. Should come out about pH 6.0, EC <75. Pour this into the plant, let most drain out, then catch the last tablespoonful or so. Then take some meter readings of that last drainage. If using bark compost which has started to decompose, you may be shocked at what you get - I have seen pH 4, and EC 1200... That means that the roots are being killed , and the plant will be in less than perfect health. This would certainly explain the die back from leaf-tips.
As to the spots, which are bacterial in origin, they are very difficult to avoid if you have good humidity ; there isa paradox here ; low humidity means no leaf spots , but poor plant health . High humidity means great plants, but high risk of bacterial and fungal infections. The great trrick is finding the right compromise. When you have that figured, let me know would you ?
Will pm you later in reply elsewhere.