I collected 3 Field Elms in the middle of May. Not the best of timing, plus minimal root. They were part of a long root off a sucker.
Anyway, potted them up and have them in deep shade still. Im using the sweating method. The soil was initially saturated, then the trees are put in clear plastic bags, tops tied, no holes. Wet sphagnum moss placed on soil surface. Aim is to keep humidity extremely high. Misted every few days/weekly. Yesterday I opened the top of the bags and misted with seaweed water
These are the first pics I took mid may