None! I know it’s hard to accept, but the spiders in the garden are our friends. They’re the good guys. They’re predators, and right now, they’re doing a fine job reducing the bug populations in our yards. So we do not recommend spraying for spiders in the garden. If the webs bother you, feel free to eliminate them with a broom or strong stream of water, but please don’t spray to kill them. Leave the outdoor spiders alone.