That may be a bold statement, but i'm sticking to it until proven otherwise ;)
Weed can be pruned any number of times, And at each site will cause two top, and in addition all
side sites will also begin to grow, causing a Christmas shaped plant to bush like a rose bush.
Stubborn indica plants, or with sativa traits as well, to bush out the same. View the image here:
Note at each internode, there is a small set of leaves there, but they do not grow on a stem, they just
exist at the joints while the plant shoots straight up the middle.
If you cut the top of that plant, growth will stop in the main cola/stem and then the leaves that existed
in the joints before will stem up and grow. This causes as much as double the bud sites as before.
In addition, each new bud site can be pruned again and again.
To do the prune, you seek the growing top "Technically any growing 'tip' will be what you need"
Look for the 3rd internode from the top, and cut about a half centimeter above the joint.
Growth will appear to stop for a day or so, then youll notice your new tips growing :D
Do not prune closer then 1 week of flower.
Do not prune when you have transplanted at least 2 days after. And wait untill growth resumes
if it hasnt in that 2 days time.
Do not prune sick plants.
Do not prune baby plants.
Do not prune clones before they are sturdy and growing fast.
Do not prune insect infested plants.
Although I never do it, you could apply a small bit of cooler wax, or gel to the cut site on the mother plant
to help against drying out, ive never had the problem. If you do keep it in mind.
You can easily "clone" anything you cut off the mother.
Not only will you get a bigger yeild from the mother plant
But you can get another tiny plant with a few more grams on it, Remember its all free anyway, you wernt
cloning, just topping :D