Strain? How many weeks in veg?
Remember the "stretch" can double, triple, or even quadruple plant size depending on the strain. I veg for 2 months, usually. Sometimes a strain will grow so rapidly that I have to put it into flower a little early. I never let a plant get over 28" in veg.
There is this old riddle we used to use back in the day:
At 1 I'm an infant.
At 3 I'm a toddler.
At 5 I'm a teen anger
At 7 I'm a maid.
At 9 I'm a crone.
What am I?
Answer: the number of points on a marijuana plant's leaves and sexual capacity.
We can all have sex as teenagers (5 points... and able to force flower), but we're really not that good at it. By adulthood (7 points) we are at our fertility prime. By the time we hit old age (9 points) we're sexual pros, we just don't have the longevity anymore.