Many people that move to Arizona do not realize we get rain in the winter and the summer. Our unique environment of sporadic winter rain with 70+ degree days is a perfect set up for weeds. Most of our communities have very vigilent Home Owner's Associations. The HOA's want our communities weed free. Some people attempt to hand pull them. However, hand pulling usually spreads the seeds so that the weeds grow exponentially.
Pre-emergent is an effective method of preventing weeds. Most landscaping and/or pest control companies offer pre-emergent. This product is put down on the entire yard outside of any grass and will typically stop weeds from growing for 6 months at a time. For homeowners with desert landscape this is a perfect fit for low maintenance. If any weeds are existing and below ankle height a post emergent can be applied to kill those off. Ideally you apply the product in January and June, but it can be put down any time of the year.
For folks in AZ looking to sell I offer free landscape services for my sellers. For buyers we have perks as well. - Your AZ Real Estate Agent offering Curb Appeal