|Reflective, insulating sleeves|
The black containers dry out too fast. Sometimes I can't keep up, especially on hot days. So I made sleeves for the containers. They are held in place with reflective duct tape. With the reflective, insulating sleeves in place, I can water less frequently.
It's possible the warm soil helped the trees grow faster. It's OK if they slow down now. They will need to harden off for winter. New, rank growth might not harden off as well, so it's time to slow down.