At the risk of being lambasted, I need advice/help with solving a watering issue. In the past, I've certainly had trouble with underwatering. The obvious solution is to water more... I've tried finding a good balance but have yet to achieve it.
I'm using either gritty mix in terra cotta pots for my succulents (jades, snake plants and ponytail palms) or a mainly bark mix in terra cotta pots for my holiday cacti. I'm zone 4 - NY State - where winters are absolutely brutal. It gets dry inside in winter, but I have humidity trays near the plants that need humidity. The jades I'm currently watering every week and a half (stepped up from monthly watering). I have several with very soft, flexible leaves (and dropped segments) and crystallized leaves. My ponytails are easier to manage and are relatively healthy. The holiday cacti get watered every five days, roughly, again depending on how thirsty they look. Lighting could be better, but for now they're in an east window with daylight bulbs (1,650 lumens total). I have a drilled well which means I have hard water. I also fertilize at every watering - a diluted dose of Foliage Pro.
I've lost a few that seem to have fallen apart right where they go into the soil, others that shed dried leaves until nothing remains and have yet more that have leaves that are perpetually flimsy and flexible (succs and holiday cacti alike).
Am I looking at a combination of not enough light with too much watering or is it something more related to the dormant season?
Any and all advice is appreciated. I've been trying to get these plants to plump back up going on almost three-four months now.