Lawn Care Guide for Matanuska-Susitna Borough
Matanuska-Susitna Borough, Alaska
USDA SSURGO / PHZMData Story
About Lawn Care in Matanuska-Susitna Borough, Alaska
Mat-Su Lawn Care Aligns with State Averages
Matanuska-Susitna Borough holds a lawn difficulty score of 56.2, placing it right in line with the Alaska state average of 57.8. While more challenging than the national median, the region's agricultural history provides a solid foundation for home turf.
Short Growing Seasons and Dry Air
Annual precipitation of 19.6 inches is much lower than the state average of 53.5 inches, necessitating consistent irrigation. With 693 growing degree days and no extreme heat, grass grows slowly but steadily during the cool summer months.
Customizing Your Mat-Su Soil Strategy
Local soil data is limited, so homeowners should perform a jar test to check for silt and clay content. Adding organic matter helps retain moisture in this dry climate, especially since ideal lawn pH stays between 6.0 and 7.0.
Preparing for Dry Soil Conditions
About 35.5% of the borough currently faces abnormally dry conditions (D0), requiring proactive water management. Focus on morning watering to minimize evaporation and ensure your lawn survives the low-precipitation environment.
Start Growing After Late May
Wait until after the last spring frost on May 23 to begin your lawn projects. With the first fall frost arriving by September 16, using fast-germinating cool-season grasses like Ryegrass blends can help establish roots before winter.
Lawn Difficulty Score
Top Grass Fit for Matanuska-Susitna Borough
Cool-season grasses are the general fit here
County soil and zone data are incomplete, so we show a category recommendation rather than a precise cultivar score for Matanuska-Susitna Borough.
Best Grass Seed for Matanuska-Susitna Borough
Zone 7a • Cool- and warm-season grasses thrive here.
Find Seeds for Zone 7aClimate Snapshot
Annual Precip
19.6"
Growing Degree Days
693.231
Base 50F
Last Spring Frost
05/23
First Fall Frost
09/16
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
1.7"
inches of water
Monthly Water
5,425
gallons
Estimated Monthly Cost
$43.40
at $0.008/gallon average
Estimates based on 20" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Matanuska-Susitna Borough
Drought Stress
With only 20 inches of annual rainfall, lawns in Matanuska-Susitna Borough face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Learn more about regional lawn challenges at The Lawn Report.
Lawn Care Advisory: Matanuska-Susitna Borough
Lawn Verdict
Lawn care guidance for Matanuska-Susitna Borough is based on available climate data. with just 693.231 growing degree days, limiting options to very cold-hardy grasses. Low rainfall (19.6 inches) means supplemental irrigation is essential during summer months.
Seasonal Breakdown
Wait until after May 23 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 58.6°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before September 16; this is the best renovation window. Winters are harsh (January averages 11.5°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
Low annual precipitation (19.6 inches) makes irrigation essential for maintaining green turf through summer. Currently, 37.1% of the county is in abnormally dry according to the US Drought Monitor. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
Matanuska-Susitna Borough is close to the Alaska average temperature, it is significantly drier than the state average (33.9 inches less).
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Frequently Asked Questions
How much rainfall does Matanuska-Susitna Borough get?
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.
Explore more data for Matanuska-Susitna Borough