Start camphor basil seeds indoors at least six to eight weeks before the last chance of frost.
Place three to four camphor basil seeds in a peat pellet, spaced at least 1/2-inch apart, and cover them with a thin layer of potting mix.
Water the seeds gently to set them in place, then put the tray in a location that consistently remains at 70 degrees Fahrenheit or more during germination.
Transplant the seedlings to larger pots once they develop at least two sets of true leaves. True leaves are the second set of leaves to appear after sprouting.
Plant in an outdoor location that offers moist, well-draining soil and full sunlight. Camphor basil grows best in soil with a pH level of 5.0 to 8.0, according to the "Encyclopedia of Herbs & Their Uses."
Work up the soil at the permanent location with a rake, and incorporate 3 to 5 inches of compost and coarse sand to create a nutrient-rich, well-draining base for the camphor basil seedlings.
Transplant camphor basil seedlings to their permanent location once soil temperatures remain at 65 degrees Fahrenheit or higher at night. All basil varieties are extremely sensitive to cold.
Dig a hole large enough to hold the seedling and its root ball. Space camphor basil plants at least 3 feet apart to accommodate the 2-foot spread of the mature plants.
Remove the seedling from its pot and place it into the prepared hole, packing soil around it and up to the base of the stem.
Water each plant to settle soil around the root ball, then cover with 1 to 2 inches of mulch. Mulch keeps the soil moist and guards against weeds.