Poison ivy thrives just as well in all zones of Florida as it does in the Appalachian Mountains. Poison oak and poison sumac also grow in Florida’s forests. But have you heard of poisonwood? Or stinging nettle? If not, grab a field guide and brush up on Florida’s toxic plants.

The nastiest species are found in tropical hammocks, but you’ll encounter stinging nettle – with beautiful little white flowers and needle-covered leaves that will make you itch for hours – just about everywhere in Florida. If you are sensitive to poison ivy, the sap of Brazilian pepper, an invasive exotic, may cause a mild skin irritation.

Be aware that most of the Florida Trail is not maintained between May and October, since few people hike during those months. An overgrown trail can be an exercise in wading through nettles and burrs. Consider wearing low gaiters, or do as most experienced Florida hikers do—wear long lightweight pants to protect your legs, even in summer.