Encyclia (Prosthechea) Cochleata leaf spotting

[BernieK]

Hello Ray,
I use the MSU 13-3-15 during the spring, summer and fall months at 5 cc per 4 litres (1 US gallon) weekly (three times a month) with a full flush once a month. In the winter I use Dyna-Gro liquid bloom (3-12-6) and Pro-Tekt (0-0-3) at 1/4 strength weekly with monthly flush.
In winter I use filtered rain water (we get lots of rain) and the rest of the year I use tap water with TDS levels around 65-70 ppm.