Lawn & Seed
Calculate grass seed by species, sod rolls and pallets, and fertilizer pounds needed for new lawns and overseeding.
Grass Seed Calculator
Pounds of seed by grass species and seeding rate for new or overseeded lawns.
Sod Calculator
Square footage, rolls, and pallets of sod with waste factor.
Fertilizer Calculator
Pounds of fertilizer product and bag count by N-P-K analysis.
What Do Fertilizer Numbers Mean? NPK Explained
The three fertilizer numbers are the NPK ratio: % nitrogen, % phosphate, % potash by weight. A 28-0-6 bag has 28% nitrogen and no phosphorus. How to read and use them.
Grass Seed Per Square Foot: Rates by Species
Kentucky bluegrass needs 2–3 lb per 1,000 sq ft; tall fescue needs 6–8 lb. Seeding rates by species for new lawns and overseeding, sourced from university extension.
How to Lime a Lawn: Rates, Timing, and Soil pH
Lime your lawn when soil pH is below 6.0 for most grasses. Apply up to 50 lb per 1,000 sq ft per application. Soil test first — overliming causes its own problems.
Overseeding Your Lawn: When, How, and at What Rate
Overseed cool-season lawns Aug 15–Oct 15; warm-season lawns in May–June. Mow low, dethatch or aerate, seed at half the new-seeding rate, water 2–3x daily for two weeks.
Sod vs. Seed: Which Is Better for Your Lawn?
Seed costs $0.05–0.20/sq ft; sod costs $0.50–1.50/sq ft installed. Seed wins on cost; sod wins on speed and slopes. Compare by lawn size, budget, and timeline.
When to Fertilize Your Lawn: Cool and Warm Season Schedules
Cool-season lawns get most fertilizer in fall (Aug–Nov); warm-season lawns in late spring and summer. Schedules and nitrogen rates by grass type.
When to Plant Grass Seed: Best Times by Region
Cool-season grasses seed best late August–October; warm-season grasses seed best late April–June. Soil temperature 50–65°F for cool-season, 65–75°F for warm-season.