Amend the soil with some compost or soil amendments that will lighten the soil, allow for good drainage and provide some nutrients for good establishment. Position each plant at about the same depth as it was in the pot. To keep plants disease-free, water and fertilize for strong growth. Plants that are neglected are prone to serious disease problems and may ultimately have to be removed and replaced. Goldberg recommends a regular cleaning regimen that includes removing weak or diseased vegetation, raking up fallen leaves and sanitizing gardening tools.
Many diseases are spread by contaminated pruning shears, so make sure to clean tools between cuts.
To disinfect garden tools, dip them in a 10 percent bleach solution or in rubbing alcohol.