As a species I really feel like we are yet to master anything. So I've been looking into agriculture and I remembered that experiment some people did as kids where they played music to plants, and sometimes they would grow better. Apparently this is because the vibration helps the flow of water throughout the stems of the plant. So knowing that there are a few other things to increase the power of our plants, think of romaine lettuce as a base.

you would need to:
grow it vertically
vibrate the plants
grow in uv light (uva preferably)
grow in coconut husk instead of soil

Granted I need to do more research but I thought it might be useful to share my thoughts here before I go out of my way to make super lettuce.