Benzelsanswered grow question 3 years ago Your main lining for an outdoor grow? Oh so your going for a giant mainline bigger than anything we seen on here before- I like it. In that case id leave em on, They will absorb more light=more energy = more growth. Defol later on - because the sun actually moves across the sky and doesnt stay in one place like a LED in a grow room, you can leave more leaves on as the sun moves they will still get light. Outdoors your better off leaving more leaves on than you would indoors, ok. Take off any un wanted shoots thou- but leave as many leaves on for as long as possible outdoors.