Palm Fronds Put in Garbage Cart Do Not Compost Palm fronds cannot be composted with your other yard or food waste. Certain species of palm trees have leaves, seeds or cones that produce toxins dangerous to humans and pets. If disposing curbside, make sure palm fronds are fully contained. Some Palms are Poisionous Get informed about which palm varieties are poisonous to protect others, your pets, and yourself, especially when landscaping. Find out which common palm trees and plants contain poisons here.