Answer: In Arizona, most homeowners use Bermuda grass as a summer lawn and over-seed with perennial ryegrass in the fall for a green lawn until spring. Bermuda grass can take the heat; ryegrass prefers cool weather. Bermuda usually greens up in May and goes dormant in October; ryegrass greens up in October and dies down in April. Now, since it's almost June, you can water deeply once or twice each week and any Bermuda grass you have will green up. I'm afraid you'll have to wait until September or October to over-seed your lawn (with ryegrass) for green up in the fall and winter months. You may be able to find Bermuda seed, but typically it is sold as plugs or sod. If you can find Bermuda seeds, sow them now before the weather hits triple digits.
Best wishes with your lawn!
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