Hi there - I have two indoor herb pots, one basil and one sage. They are in a windowsill that gets direct sunlight for about 3/4 of the day. They have grown very tall, with the plant sprouting at the tip of the stalk, but no sprouting happening along the stalk, closer to the soil. As a result, they're not very fullsome. Is there a way to encourage denser growth along the stalk? Thanks so much! Brand new to gardening, no idea what I'm doing lol