I usually do this towards the end of the 3rd week. But I use 2 nets, one to spread the branches apart and the 2nd to create an even surface and support the headbuds. In the first 1-2 weeks, I keep weaving the branches under the net until the plant is wide enough for me. Depending on the growth height of the strain, I place the 2nd net 20-40 cm higher as soon as everything has grown enough through the 1st net, and I thread everything that is long enough through the 2nd net to support it. Especially towards the end of the flowering stage, when you’re flushing and the plants are getting less water, otherwise the buds might break off.