My autumn blaze maple's leaves are turning brown and crispy on the tips. I live in the Dallas, Texas area and we have had only two days under 100 out of the last 15. I have been watering one to two 20 gallon gator bags a week along with about 1 inch from my sprinkler system. I have black gumbo for soil.
Is this from too much water or not enough?
I would greatly appreciate some advice.