Lawn Care Guide for Sitka City and Borough
Sitka City and Borough, Alaska
Data Story
About Lawn Care in Sitka City and Borough, Alaska
Moderate Lawn Care in a Maritime Climate
Sitka’s lawn difficulty score of 53.8 sits slightly above the national average of 50.0, indicating manageable conditions. While its score trails the state average of 57.8, the maritime climate provides a consistent environment for growth despite a missing USDA hardiness classification.
Managing Extreme Rainfall in Sitka
With a staggering 152.8 inches of annual precipitation, Sitka receives triple the ideal upper limit of 50 inches for lawns. This saturation pairs with a low 564 growing degree days, meaning mowing schedules must prioritize drainage and moss control over irrigation.
Navigating High-Moisture Soil Conditions
Local soil data for pH and texture is currently limited for this borough. However, the region's extreme rainfall typically leads to acidic, leached conditions that require soil testing for drainage capacity to ensure roots do not rot in the damp environment.
Abundant Water Supply Minimizes Drought Risk
Sitka spent zero weeks in drought this past year and maintains 0% coverage of abnormally dry conditions. Because moisture is constant and exceeds the state average of 53.5 inches, water conservation efforts are rarely needed for lawn survival here.
Maximize the Frost-Free Season
Hardier cool-season grasses like Kentucky Bluegrass or Fine Fescue perform best between the last frost on April 21 and the first frost on October 31. Aim to seed in late spring once the soil warms enough to support the limited 564 growing degree days available.
Lawn Difficulty Score
Climate Snapshot
Annual Precip
152.8"
Growing Degree Days
564.267
Base 50F
Last Spring Frost
04/21
First Fall Frost
10/31
Days Above 95F
0
Hardiness Zone
N/A
Seeding Calendar — Zone 7A
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Begin mowing when grass reaches 3 inches
- Start irrigation if rainfall is below 1 inch/week
- Soil test every 2-3 years — adjust lime or sulfur as needed
Summer
- Mow at recommended height weekly
- Water deeply 1-2 times per week (1 inch total)
- Avoid fertilizing cool-season grasses in peak heat
- Scout for grubs and treat if >10 per sq ft
Fall
- Overseed warm-season lawns if thinning
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Apply pre-emergent for winter weeds
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
0.0"
inches of water
Monthly Water
0
gallons
Estimated Monthly Cost
$0.00
at $0.008/gallon average
Estimates based on 153" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Sitka City and Borough
Excess Moisture & Fungal Disease
High annual rainfall (153 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
Learn more about regional lawn challenges at The Lawn Report.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Data sourced from USDA SSURGO, NOAA Climate Normals (1991-2020), USDA Plant Hardiness Zone Map, and US Drought Monitor. Lawn difficulty scores and grass recommendations are estimates for informational purposes only.
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