Reviewed against University of Illinois farmdoc daily and USDA National Agricultural Statistics Service, with Osmocote release data from ICL.

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14-14-14 fertilizer โ€” also sold as “triple 14,” written as “14+14+14,” or found in longer strings like “14+14+14+14+14+14” in shipping and blend labels โ€” supplies 14% nitrogen, 14% phosphate (Pโ‚‚Oโ‚…), and 14% potash (Kโ‚‚O) by weight, with the remaining 58% made up of filler, coating, or carrier material. NPK 17-17-17 is the same idea at a higher concentration: 17% of each nutrient, 49% filler. Osmocote 14-14-14 uses the identical 14-14-14 ratio but wraps each granule in a resin coating that releases nutrients over about 3 to 4 months at 70ยฐF for the Classic grade, per ICL, rather than the few weeks typical of uncoated granular blends. Below: exactly what those numbers mean per bag and per acre, what nitrogen costs right now, and which formulation fits which crop stage.

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What “14-14-14” and “17-17-17” Actually Mean, in Pounds

The three numbers on any NPK bag are percentages by weight of nitrogen (N), available phosphate (Pโ‚‚Oโ‚…), and soluble potash (Kโ‚‚O) โ€” in that fixed order, always. A 50 lb bag of 14-14-14 contains 7 lb of nitrogen (50 ร— 0.14), 7 lb of phosphate, and 7 lb of potash, with 29 lb of carrier or coating material making up the balance. The same math scales however the label is written โ€” “14+14+14+14” and “14+14+14+14+14+14+14” are the identical 14-14-14 ratio, just formatted differently across shipping manifests, blend tickets, or search shorthand; the plus signs do not multiply the nutrient content, they just repeat the ratio notation.

NPK 17-17-17 delivers roughly 21% more nutrient per pound of product than 14-14-14 (17 รท 14 = 1.21). A 50 lb bag of 17-17-17 supplies 8.5 lb each of N, Pโ‚‚Oโ‚…, and Kโ‚‚O โ€” meaning fewer bags per acre to hit the same nutrient target, at a proportionally higher price per bag. Whether that trade is worth it depends on your freight and handling cost per bag versus the marginal cost of the extra concentration; there is no single published US retail price-per-nutrient-pound comparison between 14-14-14 and 17-17-17 (Home Depot and similar retailers list per-bag shelf prices but not standardized per-pound-of-nutrient breakdowns), so the only reliable way to compare two specific products is to divide each bag’s price by its total nutrient pounds yourself before buying.

  • Nitrogen (N): drives leaf and stem growth, chlorophyll, and photosynthesis.
  • Phosphorus (Pโ‚‚Oโ‚…): supports root establishment, ATP energy transfer, and flower/fruit set.
  • Potassium (Kโ‚‚O): regulates water movement, stem strength, and disease resistance.
Nutrient pounds delivered per 50 lb bag, by formulation 0 2 4 6 8 10 Pounds 7 8.5 7 8.5 7 8.5 N P2O5 K2O Nitrogen 14-14-14 17-17-17 Calculated from label percentages, standard 50 lb bag weight
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Triple 14 Fertilizer: What It’s Used For and When

“Triple 14,” “14 14 14,” and “triple 14 fertilizer composition” are all names for the same balanced 14-14-14 blend. Because it delivers equal parts of all three macronutrients, it is a soil-test-driven default rather than a crop-specific formula: extension agronomists recommend it when a soil test shows N, P, and K all below target in the same field, avoiding the need to blend three separate straight fertilizers. It shows up across home lawns and gardens, vegetable beds, ornamental nursery stock, and general-purpose row-crop starter applications where a grower wants uniform coverage without tailoring the ratio to one nutrient.

Key Insight
14-14-14’s equal ratio is a soil-deficiency match, not a crop-specific one. If your soil test shows adequate P and K but low N, a straight nitrogen source or a lower-P/K blend gets you the same yield response for less money spent on nutrients the soil already has.

What 14-14-14 fertilizer is used for, specifically: pre-plant or early-season broadcast application on fields or beds where soil tests confirm all three nutrients need building; top-dressing container and nursery ornamentals between feedings; and general lawn maintenance where a homeowner wants one product instead of three. It is not a substitute for a soil test โ€” applying a balanced blend to a field that is already high in P or K adds cost without adding yield, and in the case of phosphorus, raises runoff risk into nearby waterways for no agronomic benefit.


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How much 14-14-14 to apply on a lawn or garden

Lawn rates are set in pounds of nitrogen per 1,000 square feet, not pounds of product. The method in Rutgers NJAES fact sheet FS839 is simple: divide the nitrogen you want by the nitrogen percentage on the bag.

  • Target 1 lb N per 1,000 sq ft: 1 รท 0.14 = about 7.1 lb of 14-14-14 per 1,000 sq ft.
  • That same 7.1 lb also puts down 1 lb of phosphate and 1 lb of potash.
  • A 5,000 sq ft lawn at that rate needs about 36 lb of product, so most of a 50 lb bag.
  • For 17-17-17, the same target needs about 5.9 lb per 1,000 sq ft.

Because triple 14 adds phosphate at the same rate as nitrogen, it suits new lawns and beds where a soil test shows low phosphorus. On established turf with adequate phosphorus, a lower-phosphate lawn product does the same job. Some states limit phosphorus in lawn fertilizer, so check your state’s rules before spreading. Water the granules in after spreading and sweep any off paved surfaces so they do not wash into drains.

How Osmocote Fertilizer Works: The Release Mechanism

Osmocote’s release mechanism is osmotic, not chemical: each granule’s core of soluble nutrient is wrapped in a semi-permeable resin coating. Soil moisture diffuses through the coating, dissolves the nutrient core, and builds internal pressure that pushes a controlled trickle of nutrient solution back out through the same coating โ€” the thicker the coating, the slower the release. Makers rate coated products by release longevity at an average soil or media temperature of 70ยฐF; ICL rates Osmocote 14-14-14 Classic at 3 to 4 months. An uncoated granule has no coating slowing dissolution, so it releases much faster.

  • โœ” One application can cover about 3โ€“4 months , rather than several split applications with a conventional blend.
  • โœ” Release rate tracks soil temperature โ€” warmer soil means faster water diffusion through the coating and faster nutrient release, which happens to line up with periods of active root uptake.
  • โœ” Coating reduces the nutrient pulse available for a single rain event to wash off-site, compared with a fully soluble granule that dissolves as soon as it gets wet.

This is why Osmocote 14-14-14 is positioned for container nursery stock, greenhouse production, and landscape beds rather than row crops: the per-unit cost of the coating only pays off where labor for repeat applications is expensive relative to the crop’s value, or where a single planting-time application needs to carry the plant through months without a return visit.


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What Nitrogen Costs Right Now, and What That Means for 14-14-14

Because 14-14-14’s cost is driven mostly by its nitrogen component, current nitrogen fertilizer pricing is the most useful number for budgeting a purchase. As of August 2025, the University of Illinois farmdoc daily reported anhydrous ammonia (82% N) at $786 per ton, urea (46% N) at $594 per ton, and liquid nitrogen solution (28% N) at $431 per ton, all agricultural-grade spot quotes. On a per-pound-of-actual-nitrogen basis, anhydrous ammonia worked out to $0.48/lb N at that pricing. These three products are the raw nitrogen sources blenders use to manufacture finished NPK products like 14-14-14 and 17-17-17, so when anhydrous, urea, or liquid N spot prices move, blended-fertilizer shelf prices follow with a lag.

For growers sizing a nitrogen program independent of formulation, farmdoc’s 2026 crop year fertilizer decisions article cites Maximum Return to Nitrogen (MRTN) guidance of 180 lb N/acre for corn in northern and central Illinois, and 200 lb N/acre for southern Illinois, for the 2025 growing season. Those figures are university agronomic guidance for one region and one season โ€” MRTN calculators are re-run and republished annually as prices and yield expectations shift, so check farmdoc’s site each season rather than carrying last year’s number forward.

Nitrogen source spot price, August 2025 $0 $200 $400 $600 $800 Source Price ($/ton) $786 Anhydrous ammonia $594 Urea $431 Liquid N University of Illinois farmdoc daily, Aug 2025

Where to get a fresher number: farmdoc daily republishes fertilizer pricing roughly monthly during the buying season, reflecting early-month spot quotes at Gulf/NOLA terminals โ€” visit farmdocdaily.illinois.edu directly for the current month’s figures rather than relying on the August 2025 numbers above once they’ve aged. For retail 14-14-14 and 17-17-17 bag pricing at the consumer scale, compare listings directly on a retailer’s site (e.g., The Home Depot updates product pricing and regional availability continuously), since no standardized nationwide per-bag or per-pound-of-nutrient price series for these specific finished blends is published.

Current fertilizer prices behind a 14-14-14 bag

The farmdoc figures above are from August 2025. For a newer reading, DTN’s weekly survey of US retail prices for the week of August 24โ€“28, 2026 reported these averages (DTN):

Product Nutrient Average retail price per ton
Anhydrous ammonia 82% N $923
Urea 46% N $655
UAN28 28% N $428
DAP 18-46-0 $918
MAP 11-52-0 $959
Potash 0-0-60 $493

A balanced blend draws on all three nutrient markets, so its price reflects phosphate and potash costs as well as nitrogen. With DAP and MAP well above potash in the same survey, the phosphate share is a large part of what you pay for in a bag of triple 14. These are national averages for farm-scale bulk product; retail garden bags carry packaging and distribution costs on top.

14-14-14 vs. Osmocote 14-14-14 vs. 17-17-17: Side by Side

Formulation N-Pโ‚‚Oโ‚…-Kโ‚‚O Nutrient/50 lb bag Release Type Typical Longevity Best Fit
14-14-14 (Triple 14) 14-14-14 7 lb N / 7 lb Pโ‚‚Oโ‚… / 7 lb Kโ‚‚O Fast/soluble granule 2โ€“6 weeks Fields or beds testing low in all three nutrients; general lawn/garden use
Osmocote 14-14-14 14-14-14 7 lb N / 7 lb Pโ‚‚Oโ‚… / 7 lb Kโ‚‚O Coated, osmotic controlled-release About 3โ€“4 months at 70ยฐF (Classic grade, per ICL) Container nursery, greenhouse, landscape beds โ€” one application per season
NPK 17-17-17 17-17-17 8.5 lb N / 8.5 lb Pโ‚‚Oโ‚… / 8.5 lb Kโ‚‚O Fast/soluble granule (most common) 2โ€“6 weeks Same deficiency profile as 14-14-14, fewer bags needed per acre
  • โœ” Same ratio, different release speed: 14-14-14 and Osmocote 14-14-14 deliver identical nutrient percentages; the only difference is how fast the granule dissolves.
  • โœ” 17-17-17 is not a “stronger” fertilizer in kind โ€” it’s the same balanced ratio at higher concentration, so fewer bags cover the same acreage.
  • โš  None of the three fixes a single-nutrient deficiency efficiently โ€” if a soil test shows only phosphorus or only potassium is low, a balanced blend wastes the other two nutrients you don’t need.

Nutrient-Per-Acre Calculator

Enter your formulation’s N percentage, bag weight, and target nitrogen rate to see how many bags per acre and total nutrient pounds you’d apply.

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Run your own numbers

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Assumes a balanced formulation (equal N-P-K percentage, e.g. 14-14-14 or 17-17-17) and a standard bag weight you supply. It does not account for controlled-release products’ slower nutrient availability, existing soil P/K levels, or split-application timing โ€” confirm your actual N target against a current university MRTN recommendation or your soil test before buying.

Which Crops Actually Use This Nitrogen: USDA Application Data

Balanced blends like 14-14-14 and 17-17-17 are general-purpose products, but the bulk of US fertilizer nitrogen, phosphate, and potash tonnage goes to one crop. Per USDA National Agricultural Statistics Service Agricultural Chemical Use survey data covering 2002โ€“2021, corn accounted for 78% of total nitrogen fertilizer applied in US agriculture, 54% of total phosphate applied, and 53% of total potassium applied. That concentration is why nitrogen pricing news and MRTN corn guidance dominate fertilizer coverage โ€” the corn acreage response to nitrogen price is what moves the market that triple-14 and 17-17-17 blends are priced against.

Share of total US fertilizer applied to corn, by nutrient 0% 20% 40% 60% 80% 100% Nutrient Share of fertilizer applied to corn 78% Nitrogen 54% Phosphate 53% Potassium USDA NASS Agricultural Chemical Use survey, 2002-2021

NASS republishes Agricultural Chemical Use survey results annually, typically between June and August for the prior crop year โ€” check NASS’s Chemical Use survey guide directly for the current release rather than treating the 2002โ€“2021 corn shares above as fixed; crop mix and fertilizer practice both shift with commodity prices and conservation program enrollment. NASS does not break its published nitrogen/phosphate/potassium totals down by specific product formulation (there is no public dataset showing what share of applied nitrogen came from 14-14-14 versus 17-17-17 versus straight urea), so a formulation-level adoption number for triple 14 or 17-17-17 specifically is not available โ€” the closest verifiable substitute is your local extension office’s soil-test-recommendation records or your own retailer’s sales mix.

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A common sequencing mistake: applying a nitrogen-heavy blend late in a fruiting or flowering crop’s cycle, which pushes vegetative growth at the expense of fruit set. If your soil test calls for a lower-nitrogen ratio at that stage rather than a balanced 14-14-14 or 17-17-17, see this guide to high-nitrogen fertilizer uses for when heavier nitrogen is and isn’t appropriate.


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Verifying Nutrient Response After You Apply

Choosing between 14-14-14, Osmocote 14-14-14, and 17-17-17 is only half the decision โ€” confirming the application actually corrected the deficiency the soil test flagged is the other half, and that’s where field-level monitoring closes the loop between a fertilizer purchase and a yield outcome.

  • Satellite-Based Monitoring: NDVI imagery flags areas of a field still showing nutrient stress after a balanced NPK application, so you can spot-check whether the blend actually resolved the deficiency the soil test identified.
  • Jeevn AI Advisory System: Combines satellite and climate data to suggest fertilizer timing and follow-up actions specific to a field’s observed condition.
  • Blockchain Traceability: Documents which fertilizer inputs were applied and when, for supply-chain and certification records. Learn more about Farmonaut traceability.
  • Carbon Footprint Monitoring: Tracks fertilizer-related emissions for sustainability reporting. Explore Crop Carbon Footprinting.
  • API & App Platform: Pull satellite field data into your own systems via Farmonaut’s API or the developer documentation.


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Fertilizer runoff and nutrient-management compliance rules also vary significantly by state and region โ€” see this overview of ESG and nutrient-management standards for the regulatory direction these programs are heading, and check your own state’s department of agriculture for the rules that apply to your fields specifically.

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Frequently Asked Questions

What is 14-14-14 fertilizer used for?

14-14-14 (triple 14) is used wherever a soil test shows nitrogen, phosphorus, and potassium are all deficient at once โ€” general lawns and gardens, vegetable beds, ornamental nursery stock, and pre-plant field applications. It supplies 7 lb each of N, Pโ‚‚Oโ‚…, and Kโ‚‚O per 50 lb bag.

What’s the difference between 14-14-14 and 14+14+14+14 or longer strings?

None in nutrient content โ€” they’re the same 14-14-14 balanced ratio. The repeated “+14” formatting shows up in blend tickets, shipping labels, and search shorthand, but it doesn’t change the percentage of nitrogen, phosphorus, or potassium in the product.

How does Osmocote fertilizer work?

Osmocote coats each granule in a semi-permeable resin. Soil moisture diffuses through the coating, dissolves the nutrient core, and osmotic pressure pushes a metered trickle of nutrient back out โ€” releasing nutrients over about 3 to 4 months at 70ยฐF for the Classic 14-14-14 grade, per ICL, versus a few weeks for an uncoated granule.

Is NPK 17-17-17 better than 14-14-14?

Not better โ€” more concentrated. A 50 lb bag of 17-17-17 delivers 8.5 lb each of N, Pโ‚‚Oโ‚…, and Kโ‚‚O versus 7 lb for 14-14-14, so fewer bags cover the same nutrient target. Whether that’s worth the higher per-bag price depends on your freight and labor cost per bag versus the retail price difference, which you’ll need to check directly with your supplier.

Can Farmonaut help verify my fertilizer application worked?

Yes โ€” satellite NDVI monitoring flags zones still showing nutrient stress after an application, helping confirm whether a balanced NPK product resolved the deficiency your soil test identified.

Further reading:

Bottom Line

14-14-14, triple 14, and the various “14+14+14” search strings all describe one balanced ratio: 14% each of N, Pโ‚‚Oโ‚…, and Kโ‚‚O, or 7 lb of each per 50 lb bag. NPK 17-17-17 is the same balance at 8.5 lb of each nutrient per 50 lb bag. Osmocote 14-14-14 carries the identical ratio inside a resin coating that stretches release to about 3โ€“4 months at 70ยฐF (Classic grade) instead of the few weeks a standard granule lasts. None of the three should be bought on ratio alone โ€” a soil test showing which of N, P, or K is actually deficient in your field is what determines whether a balanced blend is the right purchase, or whether a straight nitrogen source matched to current pricing (anhydrous $786/ton, urea $594/ton, liquid N $431/ton, per farmdoc’s August 2025 data) is the cheaper, more targeted route to the same yield outcome.

  • โœ” Confirm your soil test shows all three nutrients low before buying a balanced blend โ€” otherwise you’re paying for nutrients the field doesn’t need.
  • โœ” Use the calculator above with your bag weight and target N rate to size a purchase, then check that against your current university MRTN guidance.
  • โœ” Choose Osmocote or another coated 14-14-14 when application labor cost per visit outweighs the coating’s price premium โ€” mainly container, greenhouse, and landscape settings.
  • โœ” Re-check farmdoc daily and USDA NASS Chemical Use survey data each season โ€” nitrogen pricing and crop-level application shares are both republished annually and the figures above will age.
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