Is it better to spray at night or in the morning?

For most weed control products, early morning is better than night spraying. Morning applications allow you to take advantage of cooler temperatures, light winds, and active plant growth, which help herbicides absorb more efficiently. There is also time during the day for the spray to dry before any chance of evening dew, rain, or irrigation. Spraying at night can increase the risk of drift if winds pick up, and some products may not perform as well when plants are less active. Always check the label, but in Oklahoma’s climate, calm, mild mornings are usually the safest and most effective window for spraying lawns.