Basil needs a location that receives at least six hours of sunlight daily. This frost-sensitive herb should be planted outside only when the soil temperatures reach 65 degrees Fahrenheit or higher. Planting in containers allows the plant to be brought inside when temperatures are too cold.
The best soil to help basil plants grow better is a good-draining, rich soil. Adding humus or peat moss to the soil before planting increases the drainage in the soil, which reduces the chances of root rot and disease. The ideal soil pH for basil plants is 5.5 to 6.5.
Regular water is extremely important for the health of Basil plants. Deep watering every seven to 10 days using a soaker hose or a drip irrigation system ensures the roots get adequate moisture without the soil becoming waterlogged.
Keep weeds and grass down around basil plants because they will compete for moisture and nutrients from the soil. Adding a 2- to 3-inch layer of mulch such as straw, grass clippings or compost, will aid in this.
Pinching or cutting off flower buds as they appear encourages new vigorous growth. This should be done every two to three weeks.