What to Put in Potted Plants to Stop Diseases

New Potting Soil

• Potting soil that is exposed to disease-causing pathogens, whether fungal or bacterial, does not filter it out or allow it to disperse naturally. Planters are contained environments where diseases persist and continually attack the potted plants growing there. After any exposure to disease or symptoms of disease problems, empty and sterilize the planter with a gardening disinfectant that won't harm the plant. Dispose of the contaminated soil. Refill the planter with fresh potting soil before re-potting the plant.

Fungicides

• Fungicides help kill spores that remain on potted plants or in the soil. Replacing the soil does not kill the fungal or bacterial infection in the plant itself. Remove any damaged portions of the plant and keep fallen leaves or flowers from remaining in the planter. Treat the plant with a chemical agent that helps control bacterial and fungal problems to keep the potted plant healthy. Follow all directions when using fungicidal sprays and use chemicals outdoors.

Pesticides

• Pests are vectors for disease, carrying them to potted plants or making the plants susceptible to infection by injuring them. Controlling pest insects is one way to stop diseases in potted plants. Mild pesticides help control indoor and outdoor pest problems like spider mites and aphids. Spray pesticides on the leaves, stems and flowers of the potted plant according to the directions on the package to get the best protection.

Water and Nutrients

• Stopping disease involves more than just disease control. Preventing disease from occurring reduces the amount of chemicals added to the potted plant and limits the likelihood of replacing the soil. Adding the proper amounts of water and fertilizer to the potted plant's soil keeps the plant's natural defenses strong and enables the plant to fight off diseases and pests without extra assistance. Make sure the planter drains water easily and avoid adding excess fertilizer to the soil.