This Milorganite Fertilizer Is the Best for Greener Grass, According to Landscaping Experts

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The best fertilizer for your lawn depends on what kind of grass you have, what your climate is like, and the issues it's struggling with, whether that's sparse patches, weeds, or a dull, brown color. If you're looking for a thicker, greener lawn, there is one fertilizer that many experts recommend: Milorganite All-Purpose Lawn Fertilizer. When we asked these lawn care specialists what they prefer to use in their work, this fertilizer came up again and again. Here's why experts swear by it.

Why Milorganite All-Purpose Lawn Fertilizer Is the Best Lawn Fertilizer of 2026

“Milorganite All-Purpose Lawn Fertilizer is an iron-rich natural fertilizer that can be used on lawns and gardens and won’t burn if over applied,” says Lou Manfredini, Ace Hardware’s home expert. George P. Carrette, owner and operator of EcoQuiet Lawn Care LLC, agrees: “We also like Milorganite, which is not strictly organic but does add high amounts of organic matter to the soil. It also contains a lot of iron, which can give grass that nice blue-green color.” 

It has an NPK ratio of 6-4-0 (6% Nitrogen, 4% Phosphorus, 0% Potassium). Nitrogen helps replenish soil and provide needed nutrients to grass. The best way to figure out what your soil is lacking is to do a soil test.

Because this fertilizer, unlike many others, won't burn grass if you go a little overboard with it, it's a great option for folks who are new to using fertilizer. It's a slow-release fertilizer, meaning it'll last long after application, too.