We all rely on weather forecasts, especially when outdoor work or our gardens are involved. Local meteorologists do a great job of keeping us informed, but sometimes their gardening advice can miss the mark. Recently, a weatherperson warned against watering plants during the hottest part of the day, claiming it would "burn them up." This simply isn't true, and it's time to set the record straight.
While it's generally preferable to water at certain times, the idea that daytime watering will fry your plants is largely a myth. There's a tiny chance that certain plants with waxy leaves, like wax begonias, might experience very minor, cosmetic damage. Water droplets can act as tiny magnifying glasses, potentially causing small brown spots. But this is more of an exception than a rule.
Optimal Watering Times and Techniques
Ideally, watering in the morning is the best approach. This allows plants to hydrate before the day's heat arrives, and it allows the foliage to dry, which helps prevent fungal diseases.
Evening watering, especially right before dark, can be tricky. If your plants are prone to fungal problems, wet foliage going into the night can create a favorable environment for disease. The water won't evaporate as quickly, leaving your plants vulnerable.
Watering in the Heat: When You Have No Choice
Life happens. Sometimes you simply can't water in the morning or evening. Don't panic. Watering during the heat of the day won't instantly kill your plants.
Focus on getting water to the roots, not the leaves. Plants absorb moisture through their root systems, so saturate the soil around the base of the plant. Wet foliage is not a benefit. But if the foliage gets wet, the plants will survive. After all, you can't stop the rain.
The Secret to Healthy Watering: Less is More
The most common watering mistake is overwatering. It's better to water deeply and infrequently than to sprinkle a little bit every day. Water thoroughly, allowing the soil to become saturated, then wait until the soil surface feels dry before watering again. You can even let your plants show you they're thirsty by allowing them to wilt slightly before watering.
Constantly wet soil can lead to root rot, a far more serious problem than the nonexistent "burning" from daytime watering. If your plants are wilting despite being watered, and the wilting worsens after watering, root rot is likely the culprit. Dry wilting is fixable with water. Wet wilting is not.