Answer: I wish you had included the trees you've tried because that would help me determine if the problem is tree selection or ineffective watering, which is the most common cause of plant problems in the low desert. Your best bet is to stick with native or desert-adapted trees, which are adapted to our heat. One of my favorite flowering trees is desert willow (Chilopsis linearis). The common name is misleading, it's not a "true" willow. It blooms for a long period from spring to fall, with trumpet-shaped flowers that hummingbirds love. There are several named varieties with varying flower colors, in shades of pinks and purples. It is deciduous, meaning it drops its leaves in winter, but it has a nice branching structure. It's a good tree for energy efficiency if planted where it will shade the house in summer, but allow winter sun through to warm the house. Please feel free to send another email with the trees you've tried.
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