I hope your plants improve,
@Laguna, but I am not so sure about the coffee grounds being the problem, unless you are using an awful lot of it. I mix in coffee grounds with my potting soils all the time and have never noticed a problem doing so. But I am not using all that much, perhaps a half gallon of grounds to 3-4 cu. ft. of potting media. We may not be comparing apples to apples though, since I custom make all my media, from orchid media to houseplant media.