Also from SOG tutorial on the site:
" How to Make Your Own Sea of Green
For this grow style, growers usually switch to the flowering stage when plants are around 4-6 weeks old. Plants switched sooner than 4 weeks may not have enough time to get the most out of an SoG setup. Adding an extra week or two of veg, so each plant gets bigger can make a pretty big difference in yields too, so it’s about finding that balance between getting to harvest as quickly as possible versus harvesting a lot of bud.
Many growers also “top†their seedlings by removing the tips of seedlings when they have about 4-6 pairs of leaves. Topping can increase the number of buds sites, but if you have enough plants, you will have enough bud sites. It’s often easier to grow fewer plants, so for a grower with time concerns, you can get a lot of the benefits of Sea of Green with fewer plants by simply topping your seedlings and giving them an extra few days or a week in the vegetative stage."