A healthy lawn in the Bay Area doesn't happen by accident — it follows a rhythm. Our Mediterranean climate (wet winters, dry summers) means that the tasks you need to do change significantly from season to season. Follow this month-by-month guide and your lawn will stay green, dense, and healthy year-round.
This guide is written for the most common Bay Area lawn grasses: tall fescue, Kentucky bluegrass blends, and perennial ryegrass. If you have a warm-season lawn (Bermuda, St. Augustine, or Zoysia), the timing will differ slightly.
Winter (December – February)
December
- Reduce mowing frequency — cool-season grasses grow slowly in December
- Keep mower height at 2.5–3 inches to protect roots from cold
- Turn off or reduce irrigation to 1–2 times per week if we have dry spells
- Apply lime if a soil test shows low pH (Bay Area soils often trend acidic)
January
- Inspect irrigation system for winter damage and leaks
- Begin monitoring for moss — Bay Area winters are prime time for moss in shaded lawns
- Treat moss with iron sulfate if needed (improves color too)
- This is a good month to plan any spring renovations: overseeding, aeration, or re-sodding bare patches
February
- Sharpen lawn mower blades before the spring growth flush
- Apply a slow-release, balanced fertilizer (16-6-8 or similar) as temperatures begin to rise
- Overseed thin spots with a matching grass variety
- Pre-emergent weed control can be applied in late February to prevent crabgrass
Spring (March – May)
March
- Resume regular mowing as grass growth accelerates
- Mow at 2–2.5 inches to encourage dense growth
- Core aerate if your lawn is compacted or has heavy thatch — best time of year for aeration
- Increase irrigation frequency as rainfall decreases and temperatures climb
April
- Apply a second round of fertilizer (nitrogen-rich) to support rapid spring growth
- Post-emergent broadleaf weed control for dandelions, clover, and oxalis
- Check irrigation coverage — walk the yard while the system runs and look for dry spots or broken heads
- Edge lawn borders for a crisp, clean look
May
- Transition to a summer watering schedule: deeper, less frequent watering (3x per week, deep soaks)
- Raise mowing height to 3 inches as heat increases — longer blades shade roots
- Apply grub preventative if you've had grub damage in previous years
Summer (June – August)
June – July
- Water deeply 2–3 times per week — early morning watering reduces evaporation and fungal risk
- Mow at 3–3.5 inches; never remove more than 1/3 of the blade height at once
- Watch for signs of drought stress: blue-gray tinge, footprints that stay visible, blades that curl
- Avoid fertilizing during peak heat — it can burn stressed grass
August
- Begin planning fall renovation — assess bare patches, thatch buildup, and overall density
- Apply a light fertilizer application (low nitrogen, higher potassium) to strengthen roots before fall
- Schedule aeration and overseeding for September — order seed now if needed
Fall (September – November)
September
- Prime overseeding month — soil is still warm, air is cooling, and fall rains are approaching
- Core aerate, then overseed thin areas with a tall fescue blend
- Apply a starter fertilizer after overseeding to support germination
- Keep the seedbed consistently moist until new grass is 2 inches tall
October
- Apply a fall fertilizer (winterizer) — higher potassium to strengthen roots for winter
- Continue mowing at 2.5–3 inches as growth slows
- Begin reducing irrigation frequency as rains return
- Leaf removal — leaves left on the lawn over winter can promote fungal issues
November
- Final fertilizer application before winter dormancy
- Reduce mowing frequency
- Winterize irrigation system — check and insulate backflow preventers
- Apply a fungicide if you've had brown patch or other fungal issues in previous years
Signs Your Lawn Needs Professional Attention
While many lawn care tasks are DIY-friendly, some situations call for professional expertise:
- Large bare or dead patches that don't respond to overseeding
- Persistent weed pressure despite regular treatment
- Irrigation inefficiency — some areas always too wet, others always too dry
- Grub damage (irregular dead patches that lift away like carpet)
- Thatch buildup more than ½ inch thick
- A lawn that looks pale despite adequate fertilizing (often a pH or micronutrient issue)
Our maintenance clients get proactive eyes on their lawn at every visit. We catch issues early — before a small problem becomes a costly renovation. If you're thinking about putting your lawn on a professional maintenance schedule, we'd love to talk.
Let Us Handle Your Lawn Care
Consistent, professional maintenance is the easiest way to guarantee a beautiful lawn year-round. We serve all of the Bay Area — contact us for a free quote.
Get a Free Quote