Here...read this, it may help you understand a bit more....
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REVERTING TO VEGETATIVE GROWTH
This is also called Re-veging, regeneration or rejuvenation and can be done anywhere between the start of flowering and the end of the plant's peak bloom when it is ready for harvest. This does not work with strains that have autoflowering properties like Ruderalis.
The first thing you need to do in order to revert a plant back to vegetative growth is to quit the flowering photoperiod of 12/12 and change this to a vegetative pho-toperiod of 24/0 or 18/6. The 24/0 photoperiod is certainly better because it reverts your plant to vegetative growth quicker.
The next thing you should do is to remove all of the plant's flowers and calyx development by clipping them away from the plant at their base. When your plant is bare of its flowers and calyx development you can then choose to reduce the height of your plant to a stage where it resembled its vegetative growth. After a few weeks your plant will revert to vegetative growth and will no longer flower until the 12/12 photoperiod is initiated again.
When you are satisfied that your plant has reached a satisfactory level of node production change the photoperiod to 12/12 and your plant will flower again.
Reverting to vegetative growth is a way to harvest more flowers from the same plant again, however it does have the following disadvantages:
• Reverting to vegetative growth can take up to four weeks to occur properly. This time could have been spent by simply cloning the original plant and growing these clones out instead. Cloning is usually much quicker than rejuvenation.
• Plants that are rejuvenated tend to not produce the same quantities of bud that they did during their peak bloom although it is not impossible for them to do so.[/FONT] [FONT=Times New Roman, Times, serif]
• The growing medium will contain higher levels of P than l\l and K.This needs to be changed to higher or equal amounts of l\l to P and K. This can be hard to do without flushing your soil or performing a transplant. Both of these can cause stress which may lead to sexual dysfunctions appearing in the flowering stage a rejuvenated plant.
• Rejuvenated plants go through a certain amount of stress because of the photoperiod change and this can induce sexual dysfunction.
• Stress from cutting the plant during regeneration may also induce sexual dysfunction.
Some other grow books have suggested that rejuvenation compromises the genetic integrity of the plant. This is false.
A good example is if you take an IBL strain (covered in Chapter 15) which is stable for all of its traits and pollinate the females with a male from the same strain you will produce a batch of offspring. Keep some of the male pollen used in this exercise and rejuvenate one of the females. After you rejuvenate her use the male pollen again on her to create another batch of offspring.*
If rejuvenation compromises the genetic integrity of the plant then these two sets of offspring will show variations. Do the normal offspring exhibit variations when evaluated against the rejuvenated female's offspring? No, they do not. Thus rejuvenation does not compromise the genetic integrity of the plant.**
INCREASING YOUR CHANCES OF FEMALES
A well maintained grow room with plants growing in optimal conditions will naturally produce more females than males. There are some other things you can do to increase your odds of improving your male to female ratio. These are as follows:
• High nitrogen levels in vegetative growth have shown to produce more females than males. This might be a good to reason to use feeds with a higher l\l to P and K ratio rather than foods with an equal N to P and K ratio. Remember though that plant burn will only lead to stress and this will produce more males and hermaphrodites than females.[/FONT]
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• High potassium levels in vegetative growth and flowering tends to produce more males than females. Keeping your potassium levels down is another good reason to choose a food with a higher N than P and K ratio where the P and K ratios are even, or where the K ratio is kept lower than P. Remember though that lack of K can cause plant stress due to this nutrient deficiency and this can cause more males and hermaphrodites to appear than females.
• Cannabis plants grow best under conditions of between 40 and 80 percent relative humidity (rH). In the higher rH range of between 70 and 80 your female to male ratio may increase.
• Cannabis plants grow best at 75 degrees Fahrenheit. If you do not allow the temperatures to increase beyond this you will improve your chances at getting more females than males. If the environment is supplemented with C02 the temperature may be allowed to increase as far as 95 degrees Fahrenheit.
• Using MH lights in vegetative growth will improve your female to male ratio.[/FONT]
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good Luck...[/FONT]
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out. 
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