You should water drought tolerant perennials early in the morning before the sun gets hot overhead. This timing gives water a chance to soak deep into your soil before heat causes evaporation. Your plants use this moisture through the hottest part of the day.
I spent two summers testing different watering schedules in my own garden beds. Morning watering kept my plants healthy with less water. My plants watered at 7 AM looked better than plants I watered at 7 PM. They used the same amount of water but got very different results.
I also learned to spot early drought stress before my plants suffered real damage. Leaves that curl inward during afternoon heat tell you the plant needs water soon. A slight gray or blue tinge to green foliage means roots cannot find enough moisture. Catching these signs early lets you water before your plants get hurt.
Morning watering works better than evening for two key reasons. First, water soaks in before hot sun causes it to evaporate off your soil surface. Second, your plants dry off before nightfall. Wet leaves at night invite fungal diseases. Evening watering leaves foliage damp all night which leads to mold and rot problems.
Your watering drought plants goal should be deep soaking rather than light sprinkles. Water should reach eight inches down into your soil. Perennial roots grow best at this depth. Stick your finger into the soil two to three inches deep to check moisture levels. If soil feels dry there your plants need a drink from you.
Irrigation timing perennials depends on what stage your plants are in right now. New plants need water twice a week for the first growing season. Their roots need time to get established in your beds. Second year plants need water once a week during hot dry stretches. Third year plants need water only during extended drought periods.
Your soil type changes how often you need to water your drought tolerant plants too. Sandy soil drains fast and needs water more often than clay soil does. Clay soil holds water longer so you can wait more days between waterings. Check your soil moisture level before watering instead of sticking to a fixed schedule.
Adjust your watering through the seasons as your plants and weather change. Spring brings rain so you water less often then. Summer heat means checking soil moisture every few days. Fall rains reduce your watering needs again. Stop watering once ground freezes for winter. Your plants will reward this attention with strong growth and beautiful blooms.
Read the full article: Best Drought Tolerant Perennials for Gardens
