Growing and Seed Harvesting Instructions
Start the plants after the threat of frost has passed; basil likes warm weather. Pinch the last 3-6 inches of each branch to harvest the herb and keep it growing bushier. Be sure to space plants grown for seed out at least 12 inches, so they have enough space and sunlight to grow viable seeds.
Basil plants will cross-pollinate with each other, which means that seeds can be pollinated by other varieties of basil if they are planted near each other and allowed to flower. You can avoid this by planting this basil variety at least 150ft away from other varieties (learn more about isolation here).
To harvest seed, harvest whole plants and let them dry completely. In our climate, sometimes we get a frost at the end of the season that kills the basil plants, and the sun the next day dries them out completely. I really appreciate when that happens because the plants get nice and dry, and ready for threshing.