How much Kentucky bluegrass seed for 5,000 sq ft?
Seeding a new 5,000 square foot Kentucky bluegrass lawn takes about 10 pounds of seed at 2 lb per 1,000 sq ft, or 2 bags of 7 lb. The same lawn in tall fescue would take about 30 pounds.
How to work it out
- 5,000 sq ft ÷ 1,000 × 2 lb = 10 lb
- 10 lb ÷ 7 lb per bag = 2 bags
Bluegrass seed is tiny, so a little goes a long way, but it is slow: it can take two to three weeks or more to germinate, and longer to fill in. That is why many northern mixes blend it with perennial ryegrass, which comes up fast and holds the soil while the bluegrass spreads by underground rhizomes.
Adjust for your project
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- Seed needed
- 10 lb (4.54 kg)
- Seeding rate used
- 2 lb per 1,000 sq ft
- Straw to cover new seed (optional)
- 5–8 bales of weed-free straw (about 250–375 lb)
- Starter fertilizer
- 20 lb of a 24-25-4 starter (≈1 lb phosphate per 1,000 sq ft)
- Cool-season grasses usually establish best from late-summer / early-fall seeding, with spring as a second choice.
- No weed-and-feed or crabgrass preventer around seeding. Most of them stop grass seed from sprouting too. Rutgers and UNH Extension: use only a weed product whose label says it is safe for newly seeded lawns, and read it before you buy.
- Straight bluegrass can take two to three weeks or more to germinate. Many sun mixes add perennial ryegrass to hold the soil while it fills in.
- Straw is optional: use weed-free straw (not hay), spread thin and even. It keeps the seed damp and stops it washing off slopes.
- More seed isn’t better — overcrowded seedlings compete and thin out. Good seed-to-soil contact and steady moisture matter more.
Bluegrass seed for 5,000 sq ft: new lawn vs overseeding
| Job | Seed needed | Seeding rate used | Bags to buy |
|---|---|---|---|
| New lawn | 10 lb | 2 lb per 1,000 sq ft | 2 bags |
| Overseeding | 7.5 lb | 1.5 lb per 1,000 sq ft | 2 bags |
What to know about seeding 5,000 sq ft of bluegrass
At 10 lb over 5,000 sq ft, you are putting down about 0.03 oz of seed per square foot. That is so little that a push spreader on the fescue setting will empty itself halfway across the lawn. Start at the lowest setting the label gives for bluegrass, spread half the seed walking one direction and half at right angles, and weigh what is left to see how close you were.
Extension rates for straight bluegrass sit between about 1 and 3 lb per 1,000 sq ft (Rutgers says about 2, Penn State 2–3), so the page uses 2 lb. Coated bluegrass is common, and a heavy coating can be half the bag; if yours is coated, follow the rate on the bag or set the coating in More options, which doubles the weight at 50%.
Bluegrass is the slow starter. Where tall fescue or ryegrass may be up in a week or so, bluegrass often takes two to three weeks, so the top of the soil has to stay damp for longer. On 5,000 sq ft that is a lot of light, frequent watering; a hose-end timer or an irrigation zone set for short cycles makes it realistic, and five to eight bales of weed-free straw help hold the moisture.
Seed is not the only route at this size. Five thousand square feet is where sod becomes a crew job, which you can price against seed in how much sod for 5,000 sq ft. If the lawn already exists and is just thin, how much seed to overseed 5,000 sq ft uses a much lower rate.
Different size? Use the full Grass Seed Calculator.
What you’ll need
- Broadcast spreaderMid-range price
Spreads seed and granular fertilizer evenly. Use the setting on the product label, then check it on a measured area.
See options on Amazon (opens in a new tab) - Hose timerMid-range price
Shuts the water off for you. Handy for new seed and sod, which need frequent short waterings.
See options on Amazon (opens in a new tab) - Lawn roller (fill with water)Mid-range price
Presses new sod and seed into the soil. Fill it partway — you want contact, not compaction.
See options on Amazon (opens in a new tab)
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Frequently asked questions
How much bluegrass seed to overseed 5,000 sq ft?
About 7.5 pounds at 1.5 lb per 1,000 sq ft. Bluegrass fills thin spots by spreading, so overseeding rates stay low.
How much tall fescue seed for a new 5,000 sq ft lawn?
About 30 pounds at 6 lb per 1,000 sq ft: three times the bluegrass figure, because fescue seed is much larger.
How much sun and shade grass seed mix for 5,000 sq ft?
About 25 pounds at a typical mix rate of 5 lb per 1,000 sq ft. Check the bag: mixes vary with how much fescue and ryegrass they contain.
Other common sizes
Sources
- Penn State Extension: Turfgrass Seed and Seed Mixtures (opens in a new tab) — Seeding rates for bluegrass (2–3 lb), tall fescue (6–8 lb), fine fescue; pure live seed adjustment
- NC State Extension Gardener Handbook, Ch. 9: Lawns (opens in a new tab) — Seeding rates incl. bermuda and zoysia 1–2 lb, centipede 0.25–0.5 lb per 1,000 sq ft
- NC State Extension: Tall Fescue and Kentucky Bluegrass Home Lawn Calendar (opens in a new tab) — Tall fescue at 6 lb per 1,000 sq ft; Kentucky bluegrass added at 1–2 lb
- Rutgers NJAES FS584: Seeding Your Lawn (opens in a new tab) — Bluegrass about 2 lb, tall fescue 4–6 lb per 1,000 sq ft; weed-free straw 50–90 lb (1–2 bales) per 1,000 sq ft; use only herbicides labeled for newly seeded lawns
- UNH Cooperative Extension: Starting & Overseeding Lawns (opens in a new tab) — Weed-free straw, about 1 bale per 1,000 sq ft, over new seedings; renovation (overseeding) works best when more than half the lawn is still good turf; power-rake thatch first; some crabgrass herbicides can only be used on mature turf, not new seedings
- UC IPM Healthy Lawns: Starter fertilizer (opens in a new tab) — At planting: at least 1 lb P and no more than 1 lb N per 1,000 sq ft
- UMass Soil and Plant Nutrient Testing Lab: Fertilizer Guide for Lawns (opens in a new tab) — Common starter 24-25-4; new-lawn phosphate from soil test (0.5 lb P₂O₅ per 1,000 sq ft in its example)
- LSU AgCenter: Pure Live Seed Calculation (opens in a new tab) — PLS = purity × germination; seed needed = PLS rate ÷ PLS; ryegrass overseeding rates in lb PLS
- UConn Home & Garden Education Center: Understanding Grass Seed Labels (opens in a new tab) — Coating weight is shown on the label (example: 50% of the bag); purity × germination = live seed
- Clemson HGIC 1206: Overseeding With Ryegrass (opens in a new tab) — Ryegrass into dormant bermuda: 5 lb per 1,000 sq ft on established lawns, 10 lb on bare areas; mow close and catch clippings; overseeding damages centipede, zoysia and St. Augustine
- UT Extension W161-J: Overseeding Bermudagrass with Perennial Ryegrass (opens in a new tab) — Initial overseeding 10–15 or more lb per 1,000 sq ft; sports turf may exceed 20 lb a season
- University of Arizona AZ1683: Overseeding Winter Grasses into Bermudagrass Turf (opens in a new tab) — Ryegrass at 12–15 lb per 1,000 sq ft; don’t scalp; St. Augustine and zoysia not suited to overseeding