Fusarium has been a serious problem for the basil industry. Basil can be planted now. Basil loves heat. It is very sensitive to cool temperatures, and will be devastated by any hint of frost. Basil prefers a fertile, well-aerated, organically rich soil.
Basil appreciates regular fertilization and watering.
Basil should be cut for use before the first flower buds open, and harvest may begin as soon as the young plants begin to stretch up. The tips can be pinched out to encourage branching, and the tips can be used for cooking. Harvesting the tips of these side shoots can continue throughout the warm growing season. Flower buds should be pinched off as they appear since their formation alters the flavor of the plant. Because basil is best used fresh from the garden, harvest for lunch use should be done in mid-morning, after the dew has dried.