I generally only veg sativa clones for a week or two tops on the 1st run. My 1st runs are never for yield so after I see the stretch I go from there whether to train, leave untopped etc... Small pots will help as well to keep them rootbound. Long gone are the days of all my plants growing into the light lol some still do but I pinch them over but it's only a few that should of went straight to flower from clone no veg.