11. Examine plants carefully before buying
good roots bad roots
The easiest way to limit disease in your garden is to avoid introducing it in the first place. Getting a disease with a new plant is not the kind of bonus that any of us wants. One of the hardest things to learn is what a healthy plant should look like, making it difficult to know if the one you want is sick.
It is a good idea to collect a few books, magazines, and catalogs that show what a healthy specimen looks like. Don’t take home a plant with dead spots, rotted stems, or insects. These problems can easily spread to your healthy plants and are sometimes hard to get rid of once established.