Cost guides

These pages do not quote a national average from a lead-gen marketplace. They walk through the material you actually buy — pounds, bags, zones — and show the arithmetic behind it. Dollar figures appear only when an extension service publishes them.

• Cost to overseed a quarter-acre lawnPounds of seed for 10,890 sq ft, pure-live-seed math from the bag label, and Penn State's worked examples for comparing seedlots.
• Sprinkler blowout cost by number of zonesHow cost scales with zone count, CSU's GPM-to-CFM compressor formula, and fields for your local pro or rental quote.
• Lawn care: per visit vs monthly contractTurn your local per-cut quote into a monthly and seasonal total — frequency from Penn State's growth-based mowing guidance, not a marketplace average.
• Overseeding: DIY vs proPenn State seed and starter rates against a local pro quote — plus timing and seed-to-soil risks extension services warn about.

For quantities on any lawn size, use the calculators. For timing, check today's soil reading.