Schedule tree trimming before Phoenix Monsoon season begins on June 15. High winds here in the desert southwest during the monsoons can cause tree damage or even uproot trees completely. It’s always good to have trees thinned out and palm trees trimmed in late May or early June to prevent losing or damaging valuable shade trees. Give AMS Landscaping a call at (602) 944-0421 or contact us through our website at www.azlawns.com.