Lawn Care Guide for Lehigh County
Lehigh County, Pennsylvania
Data Story
About Lawn Care in Lehigh County, Pennsylvania
Challenging Conditions for Lehigh County Turf
Lehigh County has a lawn difficulty score of 55.5, which is lower than the Pennsylvania average of 59.2. While still above the national median, the local environment presents unique hurdles for homeowners in Hardiness Zone 7a. Consistent effort is required to keep lawns healthy in this part of the state.
High Rainfall Meets Frequent Summer Heat
Lehigh is one of the wetter counties, receiving 48.3 inches of precipitation annually. However, the 18 extreme heat days and 3,405 growing degree days create a high-demand environment where grass can quickly dry out. Managing this balance between heavy rain and high heat is the primary seasonal challenge.
Acidic Foundation Requires Regular Soil Testing
The soil pH sits at 5.45, requiring lime to reach the 6.0-7.0 range needed for healthy turfgrass. The soil contains 15.5% clay and 27.7% sand, providing a standard texture that responds well to fertilization. Monitoring the pH is essential to ensure your grass can actually use the nutrients you provide.
Extreme Drought Coverage Limits Water Use
A staggering 99.9% of Lehigh County is currently experiencing severe drought (D2+), the highest in this group. Lawns have endured 35 weeks of drought over the past year, causing significant stress to even established turf. Strict water conservation and dormant-season protection are vital for lawn survival right now.
Resilient Grass Choices for Lehigh
Given the 99.9% severe drought coverage, heat-tolerant Tall Fescue is the smartest choice for local yards. The growing season typically starts after the April 20 frost and lasts until late October. Establishing a new lawn is best done in the fall when the extreme summer heat has subsided.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
48.3"
Growing Degree Days
3,405.2
Base 50F
Last Spring Frost
04/20
First Fall Frost
10/24
Days Above 95F
18
Hardiness Zone
7a
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 48" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Lehigh County
Acidic Soil
Soil pH of 5.4 is below the ideal range for most grasses (6.0-7.0). Apply agricultural lime to raise pH gradually.
Persistent Drought Conditions
Lehigh County experienced drought conditions for 35 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
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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