Is it necessary to supplement natural rainfall for turfgrass in most climates within the continental United States?

Natural rainfall is often not sufficient to meet the water needs of turfgrass in many regions across the continental United States. This insufficiency arises from various factors such as varying climatic conditions, seasonal rainfall patterns, and the specific water requirements of different types of turfgrass. During periods of drought or during the growing season when turfgrass is actively growing, supplemental irrigation becomes essential to maintain healthy turf.

While some areas may experience sufficient rainfall for certain grass types or in particular seasons, relying solely on natural rainfall is generally not feasible for consistent turf health and quality. Therefore, in many climates, especially those prone to dryness or rapid evaporation, supplementing natural rainfall is critical for effective turf management.