In a non chemical garden many weeds can be utilized. Many common ailments today can be prevented using basic plants that grow in our gardens!
Dandelions: when grown organically offer roots in the spring and young greens (before flowering) that are cleansing to the liver - spring detox.
Shepherds Purse: collect and dry for tea throughout the year - stops internal bleeding.
Yarrow: will lower fever in 2 days
Chickweed: use as skin soothing agent, can be made into salves.
Plantain: kills toxins in the body, can stop some poisons.
Read up on the plants that naturally grow in your garden, sometimes referred as weeds. Many of these pants are herbs. Make sure you are knowledgeable on the proper identity of any plant before you consume them.
Editor's Note: Please be sure of your plant identification before harvesting your own herbal remedies. Some weeds can be poisonous.