There is a growing technic where you take a clone as soon as it shows roots. You plant it and throw it under 12/12 light. This will produce one main cola that a lot of times, will almost touch the soil. It is called lollypopping. I have tried it. I got much better success from the crop I grew right next to the lollypops. The crop that did better was topped and had 10 days of 20/4 lights on, then flipped to 12/12. I ended up with about 3 times the product. I did this technic for about a year. The toped plant with 10 days of veg was pretty easy to manicure. But you need more plants to get the same weight as a full sized plant. Which does not work where I am now. I can only have a max of 15 plants.
I did notice, that some strains do not do well under this techinic though. They would take 3-4 weeksa to start flowering. But a good nunmber of the strains would start showing sex and such in about 2 weeks. All three technics have their pros and cons. Full sized plants reduce the number of plants needed. 10 weeks of veg produces more bud per amount of foliage. No Veg time, means more plants but manicureing is a breeze.