they naturally get bigger as they grow protip: check out forums other than general, you might find something interesting...
This is a great community to ask questions about growing pot to! It makes me wish we had a seperate forum, completely devoted to people asking questions about marijuana growing. Maybe one day GC will create a forum specifically for marijuana growing. I suggest you continue to water the plant, and use nutes if you didn't use Miracle Grow as your soil. Sun light seems to help too.