Basil Basics: Prune basil regularly for best flavor. About every four weeks, prune basil back to just above the bottom two sets of leaves. If allowed to flower, it will lose flavor. From Fine Gardening.
Cutting your Herbs~Tutorial: How to cut herbs - for basil don't pluck leaves off, instead trim stem. Leave two sets of leaves on stem (leaves grow in pairs across from each other). Cut immediately above the second set of leaves from the ground. Plant will then grow new branches from this cut.
7 tips for growing mad giant basil plants | Offbeat Home Prune basil regularly for the best flavor. About every 4 weeks, prune basil back to just above the bottom 2 sets of leaves. If allowed to flower, it will lose flavor.
If you're growing herbs to eat, don't let them flower. The energy a plant spends in blooming and setting seed saps the plant of its potency as a food product. As soon as they appear to be heading to that stage, deadhead them
Wall Trellis Kit This is an ingenious product. With it, you can make a trellis of any shape and put it almost anywhere. To make a trellis, use the silicone glue to bond a number of the anchors to a wall or window. Next, string the wire from anchor to anchor to create a frame. Finally, use the vinyl tape to support plants on the newly created trellis.