how deep should soil be to grow basil
1 If you want to plant the basil in a container, make sure it's large enough to accommodate the number of plants you're growing; they need to be planted 6 inches (15.2 cm) apart, since they grow quite large.asil does not tolerate frost so don't plant too early. It's best to put basil somewhere where it will get a good deal of sunshine and have well-drained soil. 1  To plant the basil in the garden, dig holes spaced at least 6 inches (15.2 cm) apart. 2  Place the roots in the holes and place soil around the stems.