Enter your soil pH test result, target pH, soil type, and lawn size to get exact pounds of lime needed per application — for calcitic, dolomitic, pelletized, and fast-acting lime. Includes application schedule, bag count, and cost estimate.
All lime products raise soil pH, but they differ in speed, particle size, ease of application, and cost. Choose based on how fast you need results and your spreader type.
| Type | CCE% | Speed | Spreader | Cost/50 lb |
|---|---|---|---|---|
| Ground Calcitic Limestone | 95–100% | 3–12 months | Drop/broadcast | $5–$10 |
| Ground Dolomitic Limestone | 95–108% | 3–12 months | Drop/broadcast | $5–$12 |
| Pelletized Lime | 90–95% | 2–6 months | Any spreader | $10–$18 |
| Fast-Acting / Superfine | 90–95% | 2–6 weeks | Any spreader | $15–$25 |
| Liquid Lime | 30–50% | 2–4 weeks | Sprayer | $15–$30/gal |
| Hydrated Lime (Ca(OH)₂) | 120–135% | Days–weeks | Manual only | $8–$14 |
| Wood Ash | 30–70% | Fast | Manual | Free |
CCE = Calcium Carbonate Equivalent — higher CCE means more liming power per pound. Hydrated lime is fast but caustic — wear gloves and eye protection; not recommended for homeowners on established turf.
• Maximum single application: 50 lbs per 1,000 sq ft (most extension services)
• Never exceed: 100 lbs per 1,000 sq ft in a single season
• Over-liming symptoms: Yellowing from iron/manganese deficiency, moss growth (counterintuitive but true — excessive pH creates other issues), slow grass growth
• Split large doses: If you need more than 50 lbs/1k, split into 2 applications — one in fall and one in spring
• Re-test before re-applying: Always soil test again 3–6 months after liming before adding more
Extension service lime rate recommendations (lbs per 1,000 sq ft) for pelletized or ground limestone with ~95% CCE. Adjust for your lime's actual CCE using the multiplier column.
| pH Change Needed | Sandy Soil | Sandy Loam | Clay Loam | Heavy Clay | Notes |
|---|---|---|---|---|---|
| Raise 0.5 units (e.g. 6.0→6.5) | 12–15 lbs | 20–25 lbs | 30–35 lbs | 40–50 lbs | Single application, any season |
| Raise 1.0 unit (e.g. 5.5→6.5) | 20–25 lbs | 35–45 lbs | 55–65 lbs | 75–90 lbs | May need 2 apps if >50 lbs |
| Raise 1.5 units (e.g. 5.0→6.5) | 30–40 lbs | 50–65 lbs | 80–95 lbs | 110–130 lbs | Split into 2 seasonal apps |
| Raise 2.0 units (e.g. 4.5→6.5) | 40–55 lbs | 65–85 lbs | 100–120 lbs | 140–170 lbs | Split into 3 seasonal apps |
| Raise 2.5 units (e.g. 4.0→6.5) | 50–70 lbs | 80–105 lbs | 125–150 lbs | 170–210 lbs | Multi-year correction program |
If your lime has a CCE different from 95%: Adjusted rate = Table rate × (95 ÷ Your lime CCE)
Example: Your lime is 80% CCE → multiply table rate by 95÷80 = 1.19 (apply 19% more product to get the same pH correction)
Top-rated lime products for homeowners — from fast-acting premium options to budget bulk limestone.
Never apply lime without a soil test. Over-liming causes just as many problems as under-liming. Your local cooperative extension service provides soil tests for $10–$25 that tell you exactly how much lime to apply. Many services also provide a specific lime recommendation for your lawn. Test in fall for spring correction or in late summer for fall application.
Pelletized lime for most homeowners — flows through any drop or broadcast spreader, minimal mess, and starts working within weeks once wetted. If your soil test shows low magnesium, choose dolomitic lime over calcitic. Fast-acting lime if you need results before a planting window (2–4 week lead time vs. 3–6 months for standard pelletized).
Fall is the best time to apply lime — it has all winter to work into the soil before the spring growing season. Spring application is also effective. Avoid applying lime in summer to actively growing, heat-stressed grass. Lime can be applied to dormant warm-season grass in winter, which is actually an excellent time for dolomitic lime applications in the South.
If your calculation requires more than 50 lbs per 1,000 sq ft, split the application: apply 50 lbs/1k in fall and the remainder in spring 3–4 months later. Never apply more than 100 lbs per 1,000 sq ft in a single season. Heavy single applications don't work faster — they risk over-correction and waste product.
Apply lime when soil is moist — not waterlogged. For pelletized lime, water in with 0.25–0.5 inches of irrigation or rain within 48 hours to begin dissolving the pellets. Do not apply lime to wet, soggy soil — the pellets will clump and distribute unevenly. Ground limestone does not require immediate watering but benefits from it.
Lime takes time to fully react with soil. Do not re-apply lime until you've tested the soil pH again — at minimum 3 months after liming, ideally 6 months. This prevents over-correction. Most lawns maintain correct pH for 2–4 years after proper liming before needing another application.
| Region / Zone | Best Timing | Notes |
|---|---|---|
| Zone 5–6 (Midwest, NE) | Sep–Nov or Mar–Apr | Fall preferred — winter rain/snow works lime in |
| Zone 7 (VA, NC, KY) | Sep–Nov or Feb–Apr | Fall aeration + lime combo works well |
| Zone 8 (GA, TX, SC) | Oct–Dec or Feb–Mar | Winter dormancy application OK for warm-season |
| Zone 9–10 (FL, CA) | Oct–Feb | Cooler months; soils less acidic in these regions |
| Too Acidic (low pH) | Too Alkaline (high pH) | |
|---|---|---|
| pH reading | Below 6.0 | Above 7.5 |
| Solution | Apply lime (raises pH) | Apply sulfur (lowers pH) |
| Product | Calcitic / Dolomitic / Pelletized | Elemental sulfur or aluminum sulfate |
| Common regions | East, Southeast, Pacific NW | Midwest, Southwest, irrigated soils |
| Speed | Months (standard) / Weeks (fast-acting) | Months (elemental) / Weeks (aluminum sulfate) |
Need to lower pH? Use our Lawn pH Calculator which covers both lime and sulfur applications.
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