Basil should be started from seed in the mid to late spring. Plant seeds in well drained, slightly acidic soil with a pH between 5.5 and 6.5. The emerging plants should be kept in a small container indoors for the first six to eight weeks, then transferred to a slightly larger container. Basil is very sensitive to frost and cold, and should be kept warm at all times. Containers can be moved outdoors, if desired, once all threat of frost is past. The ideal positioning for basil containers is in a sunny windowsill. Basil loves sunlight and prefers more than 10 hours of daily light.
Like most herbs, basil doesn't want to be drenched. However, the soil should be kept moist and covered with a thin layer of mulch. Plants should be monitored regularly and flowers pinched off as they emerge to encourage bushier leaf growth. It is worth noting, however, that the creamy white flowers of the basil plant are edible if desired.
You can begin to harvest basil once the plant has at least four established leaves. Basil leaves should be cut neatly at a point 1/4 inch above the node. If your basil containers have been placed outdoors, harvest in the morning after the dew has dried but before the afternoon sun has warmed the plants. Pluck young leaves and use immediately for the strongest flavor.
Basil leaves are best used fresh. The most effective preservation method is in olive oil. Though basil can be dried, it is not recommended as this herb loses a great deal of its flavor in the drying process. Fresh basil leaves can be added to the greens in a salad or layered on a sandwich in place of lettuce. Basil is a main ingredient in classic pesto, along with garlic, pine nuts and olive oil. Tomatoes and basil are wonderful companions both in the garden and on the plate. A simple salad of tomatoes and mozzarella cheese topped with chopped basil and a light drizzle of olive oil will provide a fresh taste of Italy.