I loved your article about watering Palms. I am new to Pindo, Windmill and Washingtonia that we planted as of this current summer. I watch my newly planted palms like a hawk. When the summer heat reached in the 90's & up I started watering by garden hose very heavily around the bottom trunks of these palms. I have well water where I live in south central Georgia with lots of heat & humidity. We have heavily mulched around the palms with underlying landscape fiber to control weeds. The palms are planted around my pool in very black well drained soil that is the result from years and years of decomposing leaves and such from 100 year old pecan trees. The palms are showing much new growth and look very perky. On the hot dry days I do allow the hose to wash the trucks letting the water flow down the sides as giving the plants a cooling shower. I do not do this regularly but sparingly. The Windmill palms seem to really love this type of watering. Please let me know if I am doing the watering correctly. I do not plan on watering the palms this winter.
I have not grown palms in a humid climate so don't know the risks of trunk rot there. Hope they will do well with the hosing down of the trunks... but I see no reason why that would be good for them. You might be inviting a problem with that technique.