Rain nourishes grass, but can it be relied upon to grow healthy blades? That depends on the environment and other factors.
First, the soil must contain enough nutrients for the grassroots to draw from when it rains. Otherwise, rainwater will merely wash away fertilizer, leaving nothing for the grass.
Second, drainage should be adequate. If water pools in one spot for too long or excess rainfall is common, pools form and suffocate the growing blades of grass. This causes dead or spongy patches in a lawn and may indicate that the soil doesn’t drain properly.
Third, air temperature determines if rainfall is beneficial or detrimental. Warm weather encourages growth while cold temps put plants into hibernation mode preventing them from receiving all requisite nutrition from rainwater.
Ultimately, sufficient rainfall helps grass grow lush and green but insufficient rainfall leads to brown patches in a lawn as wilting increases during drought-like conditions. Proper care and maintenance also contribute significantly to a vibrant lawn year-round!