Much for potted herbs?
I have several pots of herbs that I am currently in the process of re-potting, due to a potting soil that does not seem to be working well for me. They are drying too fast at the top, and the pots are self-watering, so they're pretty moist at the bottom, despite my careful attention to the watering. The thymes and oregano especially seem to be root rotting a bit too much. I am wondering about trying a mulch layer over the top. I have used pea gravel with the old soil, and it didn't seem to help much, either for the herbs or the fungus gnats that have invaded. Is there something better for the herbs? They mostly live inside with grow lights, though I do take them out during daytime sometimes.
English Thyme, Lemon Thyme, Rosemary, Greek Oregano, Chives (onion and garlic), Marjoram, and Scented Geraniums