I live in San Francisco and have two princess flower trees in front of my house in containers. They get full sun (maybe too much?) and are beginning to flower alot but the leaves are dry around the edges and falling off. The leaves begin as crimson brown and never turn green. The trees have excellent drainage but is it possible that I am watering too much or too little? Right now, I give a thorough soaking every 2-3 days because I was advised to water them whenever my water meter reads dry. Please help! I love these trees so much and can't figure out what to do. Thanks!