Borage is a tough plant and can tolerate some neglect.
Water borage well until plant is established. The more water borage receives, the larger the plant becomes.
Pinch back borage seedlings when they are about 6 inches tall to encourage a fuller plant. Trim borage as desired for size.
Borage does not require additional fertilizer.
Borage reseeds easily. Each borage flower develops into several seeds; harvest flowers before seeds form to prevent reseeding.