plants will often show their sex after 3-5 nodes. You can top if you would like but like Zandor said ... don't top during 12-12 cycle... if you top, give your plants 7-10 days more of veg cycle before you you switch to 12-12..

good luck
Garden Knowm Reviewed by Garden Knowm on . Light Change I have a Healthy 5 node plant that had begun flowering. Do I need to top it? When do I change light cycle to 12/12? Also Should I feed the flowering nute now? I have ff big bloom. Any help is very appreciated. Rating: 5