Nowadays "xeriscaping" is becoming a negative word as people associate it with "zero plants" or "rocks and cactus". What xeriscaping truly embraces is an area filled with plants and terrainthat is more self-sufficient and requires less water.
Water in the early or late part of the day to decrease evaporation
If your house is not connected to a municipal water supply you can have a rain catchment system in Colorado
Consider supporting Colorado's "No Mow May" movement.
One hour of mowing is equivalent to driving 350 miles in an average car.
Mow high to shade the roots and prevent evaporation and prevent weeds.
Consider a reel mower is good for exercise and reduces emissions and noise.
Electric lawn mowers produce less than 1% of the emissions of a gas powered one.
Grasscycle by not collecting clippings to increase nutrients
Plants & Weed Maintenance
Plant native plants that are adapted to the environment and will require less care.
When buying seeds or small plants look for "organic" or "heirloom" (best because they have natural resistance and no genetic modification)
Conventional flower bouquets are often grown with heavy pesticide use. Try to find a local organic alternative either from a farmer or a natural foods store.
Instead of chemical fertilizers which cause the grass to grow faster and therefore deplete the soil of nutrients, use compost or organic fertilizer.