Chris, if your plants are in plastic, simply having a tiny bit of the pot touching the water should be no problem. If you are using clay, that could be a problem because the clay to constantly absorb the water. I don't know that it would but it could. You could put some pea gravel on the tray that would take care of the problem. Lowe's and Home Depot sell bags of pea gravel as well as very small bags of decorative stones.
