Your Ant Plant likes to be watered when 50-75% of the soil volume is dry. Always check the soil before watering. Water thoroughly and evenly around the pot until you see water flow out of the drainage hole. Be sure to discard any excess water after a few minutes.
If the leaves dropping are dry and crispy, then your Ant Plant soil most likely got too dry. If the leaves are mushy or yellow, then it was overwatered. If you notice either of these symptoms, check the soil moisture to see which issue it might be.
Your Ant Plant prefers bright indirect light. If placed in too low of light, yellow leaves may develop and eventually drop. Too much light will scorch the leaves. Bright indirect light can be found in places close to an east-facing window or a few feet back from an unobstructed southern or western window. If you are worried you don’t have a spot with enough light, try adding a grow light.
Ant Plants usually prefer warm humid environments. If it gets too cold or your Ant Plant is placed in a drafty area, it may respond by dropping its leaves. Make sure your plant is not in a drafty area or in the direct path of any open vents.
Low humidity and dry soil cause leaves to droop and brown on their edges, later followed by entire yellowing, browning, and shedding of leaves. If this happens, your Ant Plant will appreciate a boost in humidity from regular misting, a humidifier, or pebble tray.