How To Re-veg A Marijuana Plant

First of all re-veg means to re-vegetate in grower slang. Re-vegetating is when you take a plant that's in flower and force it back into vegetative state. Vegetative state is the state or mode a plant is in when it is NOT flowering. The main reason to re-vegetate is to make a mother plant. It's nice to keep a mother plant in veg state, that way when you want to make new plants you just take cuttings from her and root them. Sometimes a good plant sneaks up on you and you may decide you want to preserve her and re-vegging is one option. There is a trick to re-vegging a marijuana plant though. You need to keep enough shade/sucker leaves on the plant to allow it to draw water up and transpire.
If you don't keep enough shade leaves on your marijuana plant it can drown easily. Keep the lower "popcorn" buds on so you have some sites for re-vegetation to take place. When you water be extremely careful not to give your plant much more water than the plant is going to use in a day. Don't soak the pot. Feed your plant light doses of grow nutrients. I also like to use a product called Greenfuse Grow, it helps accelerate plant growth. I don't use as much as the manufacturer suggests most of the time. Definitely don't give the plant a heavy dose of this in the beginning stages of re-vegging. You also need to keep enough bud sites going because that's where you are going to see the plant begin to re-veg. Without any bud sites, the plant can't produce new vegetative growth. So cut your plant back similar to the picture above. This way you can harvest over 95% of the medicine and have plenty bud sites to get some good re-veg action.
Make sure to leave as many of those sucker leaves on as possible. Put your plant into your veg room and give it 18 -20 hours of light. There is no need to give the plant straight 24 hours of light unless you are using florescent lighting. I don't recommend using florescent lights to re-veg with but it has been done. It will take about 1-2 weeks before you begin to see new growth shooting from the buds If you use a simple 400 watt metal halide HID light. Keep on watering LIGHTLY until the plant becomes bushy again and starts using more water. Once the plant begins to re-veg start giving it more grow nutrients. After 4 or 5 weeks you should have a plant that has fully transformed from a mature flowering plant to a mature plant in vegetative mode. In a couple more weeks you should be ready to start taking cuttings. Remember to keep your mother plant in 18-20 hours of light and to give it at least 4 hours rest every night. Some growers believe that a marijuana plant becomes more potent as it ages. After it reaches about 1 year it maxes out in potency