Home Spreader Settings Milorganite

Milorganite Spreader Settings for Every Spreader Brand

Milorganite is the product that breaks people's intuition about spreader settings: the numbers look alarmingly high (11.5 on a Scotts dial where synthetics use 4), and first-timers routinely assume the chart is wrong and dial down — then wonder why nothing greened up. The numbers are right, and the reason is simple physics covered below. This page collects Milorganite's official settings for every major spreader, explains the 32 lb vs 50 lb Greens Grade difference, and includes a planner for amount, bags, and the full 4-application season.

The quick answer:

32 lb Classic bag → 12.8 lbs per 1,000 sq ft (one bag covers 2,500 sq ft). Scotts EdgeGuard DLX: 11.5. Broadcast spreaders: Milorganite recommends half the setting, two perpendicular passes.

Jump to: Planner · Why settings run high · All-brand settings chart · 32 lb vs 50 lb · FAQ

Different product in your spreader? Cross-brand converter & rate finder · Spreader-specific guides: Scotts · EarthWay

Calculator

Milorganite Application Planner

Lawn size in, everything out: pounds per application, bags to buy, your spreader's setting, and the full-season total.

Stock up before the seasonal shortages: Milorganite fertilizer↗

Why Milorganite settings look so high (and why you shouldn't dial down)

It comes down to nitrogen analysis. Milorganite is a 6-4-0 organic — about 6% slow-release nitrogen — while typical synthetic lawn fertilizers run 25–32% nitrogen. Delivering the same pound of nitrogen to 1,000 sq ft therefore takes roughly four times the physical material: 12.8 lbs of Milorganite per 1,000 sq ft (a 32 lb bag covers just 2,500 sq ft) versus around 3 lbs for a synthetic. Four times the granular volume has to fit through the spreader gate in the same walking time, so the gate must open far wider — an EdgeGuard at 11.5 instead of 4 isn't an error, it's the only way the material physically fits through.

This is also why "my spreader ran empty so fast" is normal with Milorganite: a 15,000 sq ft capacity hopper rated for synthetics holds only about 3,500 sq ft worth of Milorganite. Plan refills accordingly — the planner above shows total pounds so you know what you're carrying.

Milorganite settings chart — 32 lb Classic, by spreader

Milorganite publishes settings per spreader on its official settings pages; this table collects them in one place. Broadcast values follow Milorganite's two-pass convention — run half the listed setting in two perpendicular passes where marked.

Spreader Setting (32 lb Classic) Method
Scotts EdgeGuard DLX / Mini 11.5 Half setting × 2 passes
Scotts Elite 11.5 Half setting × 2 passes
Scotts Turf Builder Drop 8.5 Overlap wheel tracks
Scotts Wizz (handheld) 6.5–7 Small areas / spot feeding
EarthWay EV-N-SPRED (standard red tray) 13 2 passes
Lesco rotary 17 Half setting × 2 passes
Agri-Fab broadcast (push or tow) 6.5 Half setting × 2 passes

Source: Milorganite official spreader settings pages. Spreader not listed? Milorganite's fallback method: open the gate to ¾ of full, spread a weighed 6.5 lbs, and adjust until it covers ≈500 sq ft — or use the rate → setting tool with 12.8 lbs/1,000 and calibrate.

32 lb Classic vs 50 lb Professional (Greens Grade): not the same settings

The 50 lb Professional bag carries the same 6-4-0 nutrients but as Greens Grade granules — a much finer grind originally made for golf greens. Finer granules pour faster through the same gate opening, so the 50 lb bag has its own settings chart on Milorganite's professional settings page, with lower dial numbers than the Classic despite a nearly identical rate (12.5 lbs per 1,000 sq ft — a quarter of the 50 lb bag covers 1,000 sq ft, one bag covers ~4,000 sq ft).

This is the same granule-size effect (SGN) covered on the Lesco page, and it's the most common mistake pro bag buyers make: reusing Classic settings with Greens Grade over-applies meaningfully. The planner handles both products separately.

The 4-application season

Milorganite's program is four applications per year — the memorable holiday schedule for northern lawns runs roughly Memorial Day, July 4th, Labor Day, and around Thanksgiving (the "dormant feed"), with southern schedules shifted earlier and later. At bag rate each time, a season is simply four times the per-application amount, which is why the planner reports both numbers: buying the whole season's bags at once avoids the mid-summer stock shortages Milorganite is famous for.

FAQ

Why are Milorganite spreader settings so much higher than regular fertilizer?

Because the application rate is ~4× higher by weight: Milorganite is ~6% nitrogen, so it takes 12.8 lbs/1,000 sq ft to feed what ~3 lbs of synthetic delivers. Four times the material needs a much wider gate — full explanation above.

What is the Milorganite setting for a Scotts EdgeGuard spreader?

Milorganite's published EdgeGuard DLX setting is 11.5 for the 32 lb Classic bag (12.8 lbs/1,000 sq ft), run as half-setting × two perpendicular passes per Milorganite's broadcast recommendation.

Are the 32 lb and 50 lb bags spread at the same settings?

No — the 50 lb Professional bag is finer Greens Grade material with its own chart and lower dial numbers at a similar rate (12.5 lbs/1,000). See the comparison above.

How much Milorganite do I need per year?

Four applications at 12.8 lbs/1,000 sq ft each: a 5,000 sq ft lawn uses ~64 lbs (two 32 lb bags) per application, ~256 lbs (eight bags) per season. The planner computes it for your exact lawn.

Can Milorganite burn my lawn if I over-apply it?

Manufacturer guidance describes it as non-burning even above label rates — one of the most forgiving products to learn spreading with. Over-application still wastes money, so calibration is worthwhile; it just isn't a turf-injury risk the way over-applied synthetics are.

Related settings & tools

Important note

Settings and rates on this page follow Milorganite's official spreader settings pages, which note that settings are a guide varying with walking pace and spreader condition, and that calibration gives best results. The bag label supersedes any chart. Affiliate links on this page support the site at no extra cost to you.