Fertilizing 2-Month-Old Seeded Lawn in Central Wisconsin (40s/30s)

New homeowner, central WI, 2-month-old seeded lawn (not sod). Day 40s, night 30s. Is it too late to fertilize? What product?

Seedlings Are Delicate

Young grass roots are easily burned by fertilizer salts. Cold temperatures reduce nutrient uptake.

General Guidelines

• Temperature: Wait until consistent 70°F+ day/night for efficient use.
• Moisture: Adequate soil moisture required for nutrient mobility.
• Day length: Shortening days limit photosynthetic capacity.

Recommendation

Hold off on granular fertilizer. If you must feed, use a very dilute liquid fertilizer (e.g., 1/4 strength fish emulsion) every 2–3 weeks until growth slows. Better: wait for spring green-up and apply a quality starter fertilizer then.

Local Resource

UW-Extension Madison (432 N. Lake St, Madison, WI 53706) has Wisconsin-specific lawn calendars and soil testing info.