Quote:
Originally Posted by Jim Kawasaki
I would suggest before using CHC to pot up any orchids, not just cymbidiums, to be sure to leach out any salts in it. At a minimum, soak it for 12 hours then drain the water then soak it again and drain. Add about one teaspoon of epsom salt (magnesium sulfate) per gallon of water of each soaking to help neutralize any salts within the chips.
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Yes I do agree, but to a point. The CHC I use doesn't need leaching at all, it has already been done.
So ultimately it depends on the CHC but if in doubt go with the advice above.