Here's the scoop:The very best way to help save money on replacing plants & reducing water consumption is to mulch. Mulch will help seal in the moisture that is already in your soil & keep your plant's roots cooler in the summer.
The rule is to have at least 3" of mulch in your beds. Native hardwood mulch is the best for our beneficial microbes, bacteria, fungi & wiggly worms. As these critters eat the mulch, this not only aerates your soil but also fertilizes the soil. Mulch turns into compost, so as long as you are mulching in the spring & fall, you continuously improve your soil which is the key to a healthy landscape.
If you are using drought tolerant plants & they are at least one year old, they will need minimal watering this summer. Happy Mulching!