Can they all be foliar sprayed? Organics Alive Support January 23, 2020 21:46 Yes, all OA products can be foliar sprayed. FCB is the only product which does not go into the root zone. Related articles What happens if I over feed with the fertilizers? Can Fertilizers and fermentations be combined with other products? Who else uses OA products? Do you need to use any other products with your line? Can I use it straight? Comments 0 comments Please sign in to leave a comment.