Mold Kill 128 oz RTU, Spider Organics. 1 Gallon. Spray on fruits and veggies. Mold Kill can be used on outdoor and indoor plants. It is for use during grow and flower cycles. Saturate top and underside of leaves, the entire plant. For best results spray every 3 to 5 days at least 3 times. Follow up with Mite and Mold Rinse. Use up to 3 days before harvest.