A month-by-month lawn care calendar for California homeowners, with mowing, fertilizing, and watering guidance tuned to our Mediterranean seasons.
Maintaining a natural lawn in Southern California requires a different approach than what you might find in gardening guides written for cooler, wetter climates. Our Mediterranean pattern, mild wet winters and hot dry summers, demands a seasonal care strategy that works with local weather rather than against it. Whether you are growing warm-season Bermuda grass, cool-season tall fescue, or a hybrid variety, timing matters.
January to March: transition and prep
January through March represents the transition from our rainy season into early spring. Cool-season lawns like tall fescue are at peak growth and can receive a balanced fertilizer application in late February. This is also a strong window for overseeding thin areas. For warm-season grasses like Bermuda and St. Augustine, this period is dormancy. Resist the urge to over-water dormant turf; doing so encourages fungal diseases without producing meaningful green-up.
April to May: active growth begins
April and May mark the beginning of the active growing season for warm-season grasses. As soil temperatures rise above 65 degrees Fahrenheit, Bermuda breaks dormancy and begins lateral growth. This is the time to apply a nitrogen-rich fertilizer and lower mowing height gradually. For fescue lawns, late spring is heat stress management: raise mowing height and shift to deeper, less frequent watering.
June to August: summer survival
Summer in Southern California tests every lawn. For warm-season lawns, summer is prime time: mow more frequently and keep irrigation consistent within local restrictions. Fescue lawns require a survival mindset. Avoid fertilizing during peak heat, water deeply in early morning hours, and accept that some browning is natural and temporary.
Field rule
Never remove more than one-third of blade height in a single mowing. Sharp blades matter; dull blades tear tips and create brown edges.
September to October: renovation window
September and October are the most important months in the California lawn care calendar. Cool-season grasses enter a second peak growth period, and this is the premier window for overseeding, aeration, and renovation. Core aeration improves infiltration and root health. Warm-season grasses slow as nights cool, so this is the time for a winterizer fertilizer with higher potassium to harden turf for dormancy.
November to December: close the year
November and December close out the year with minimal intervention. Cool-season lawns can benefit from a final fertilizer application in early November. Warm-season lawns enter dormancy; mowing can cease once growth stops. Avoid heavy foot traffic on dormant turf. If you prefer a green lawn year-round, overseed Bermuda with annual ryegrass in late October.
