Phomopsis blight will cause new growth to turn yellow and then brown as it dies. Make sure your soil offers good drainage as too much moistness can make the problem worse.
Arizona cypress trees are not particular about soil pH and can grow in acidic, neutral, or alkaline dirt. It can also tolerate clay, loamy or sandy soils. However, the soil should be well-drained. Arizona cypress can tolerate dry soils, but it does need at least 10 to 12 inches of water annually. Any location chosen should offer proper drainage for optimal growth. It will grow better if it is watered regularly.
As its name suggests, the Arizona cypress is tolerant of hot and dry conditions like you would find in the American Southwest or Mexico. In areas of high humidity, the Arizona cypress might be more prone to diseases.