As soon as you can. If you wait too long the stems can become woody and loose the necessary fkexibility for super cropping. Be sure that after doing it, you tie the branches or they will right themselves up in a matter of days.
Drgreenfun First go at living soil so as o prepare the main room and mix my own soils I've used the last of my compost and peat moss mixed and added a cover crop. Also using Eco thrives biosys to add bacteria to the soil.