Weed your garden. Weeds can have blights and diseases that can spread to your healthy plants. Weeds will also harbor disease-carrying insects. Mow around the garden if weeds are plentiful. Stay out of the garden when it's wet.
Diseases spread more rapidly among wet plants.
If you're working among wet plants, disease organisms may cling to your clothes and find a new home in a drop of water on another plant. You could easily infect any plants that you brush against. Water during the early morning, so your plants have time to dry before nightfall. This helps check the spread of diseases. Plant disease-resistant varieties.