I have some rootbound plants in 25 gal fab pots. The roots have also grown thru the bottom of the pots into the ground. So, the plants have bud sites all over now and the new leaf growth around these small buds appear dry and cracked. The leaf edges are curled up. This is happening mostly at the ends of the branches, and some of the lower branches look OK, but not really. A lot of the new buds have turned brown and are dying. I thought it may have been under watering, so today i made a hose accessible to the site so I can water them every day. Don't know if that's going to fix it though. Got any advice?