Lawn care for 20,000 sq ft

Seeding, feeding & sodding 20,000 sq ft

A 20,000 sq ft lawn needs about 160 lbs of tall-fescue seed for a new lawn — or 40 lbs if you go with finer bluegrass. To sod it instead, that's roughly 2,334 rolls (47 pallets) including 5% waste. The number that moves your total most is which grass you seed, since rates range widely by type.

For feeding, plan about 4 bags of fertilizer for 20,000 sq ft if each bag covers ~5,000 sq ft — but match it to your product's rated coverage and a target of roughly 1 lb of nitrogen per 1,000 sq ft per feeding. Bag coverage and the N in the N-P-K number are what actually decide how many bags, not the lawn size alone.

Seed vs. sod is the big choice at 20,000 sq ft: seed is far cheaper and comes in many grass options but takes weeks to fill in and needs constant moisture; sod is an instant lawn at several times the cost. Either way, buy ~10% extra seed for bare spots or count sod with the 5% waste the calculator already adds.

What affects the amounts

Grass seed for 20,000 sq ft by type

Lawn seeding & sod tips

• Measure in sections and add them up — an accurate square footage is what makes the seed, fertilizer, and sod counts right.
• Pick your grass before you buy seed: rates range from ~1.5 lb/1,000 sq ft (bermuda) to 8 lb (fescue), so the type sets the bag count.
• Overseeding an existing lawn needs about half the seed of a new one — switch the mode in the calculator.
• For sod, order by the pallet (~450 sq ft) and lay it within a day of delivery; the calculator already adds 5% for cuts and waste.

Your exact lawn

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Frequently asked questions