How often is Milorganite recommended by AI?

Milorganite appeared 11 times across all agent responses in our latest lawn fertilizer benchmark.

What's the best budget lawn fertilizer according to AI?

Under budget-constrained prompts, AI models most frequently recommend GreenView.

Are lawn fertilizer AI recommendations biased?

We classify AI models by commercial interest: Claude (independent), Perplexity (search-grounded), ChatGPT and Gemini (commerce-influenced). Commerce-influenced models may weight products with advertising or shopping integrations differently.

How does RecoScope track lawn fertilizer recommendations?

We run three standardized prompts through ChatGPT, Claude, Gemini, and Perplexity, then parse every response for brand mentions, rank position, and frequency. Seasonal categories are benchmarked weekly.

Mar 26 Apr 8 Apr 13 Apr 23 May 3 May 13 May 24 Jul 7 Jul 17 Jul 27 Sep 1

Seasonal weekly benchmark — Sep 1

Lawn Fertilizer

Sep 1

Rank Trend

How top brands moved week over week. Rank 1 is the top position.

Scotts and Milorganite are the two most mentioned lawn fertilizer brands in this measurement. Both appear in every response that named a brand at all. Their reach across the four engines is identical. Their standing as a first choice is not. Scotts holds a top three position on all four engines. Milorganite holds one on two of the four. Being named everywhere and being recommended first are different things, and this category separates them cleanly.

Top Brands by AI Mention Frequency

Mention frequency counts how many times a brand appeared across all AI responses. This differs from top-pick rank, which reflects each model’s #1 choice.

Overall Leader = most total mentionsTied #1 = tied for most mentionsHigh Consensus = top 3 in 3+ modelsTop in [Model] = #1 pick by that model onlyNever Top-Picked = high mentions but not in any model’s top 3

1MilorganiteTied #111

2ScottsTied #111

3The AndersonsTop in Gemini4

4SundayTop in Chatgpt3

5GreenView3

Opportunity for Brands

Milorganite is named in every response that mentioned a brand and still reaches the top three on only half the engines.
It is described as forgiving and hard to over apply rather than as the best choice for the job.
A brand in that position is winning consideration and losing the recommendation.
Five brands appear on a single engine each.
Lesco, Espoma, Expert Gardener, GroundWork and Members Mark have almost no cross engine presence at all.
One engine answered the open question with nitrogen arithmetic and named no brand anywhere in its response.
That is a reminder that this category can be discussed usefully without naming a single brand.

Cross-Agent Comparison

How 4 AI models rank the same category. Hover a brand to trace it across models.

4 agents · top 3 each

Agent	#1	#2	#3
chatgpt	Sunday	Scotts	GreenView
claude	Scotts	The Andersons	Milorganite
gemini	The Andersons	Scotts	Lesco
perplexity	Scotts	Vigoro	Milorganite

What This Means

The four engines agree on the shortlist and disagree on the winner.
ChatGPT puts Sunday in first position.
Claude and Perplexity both lead with Scotts.
Gemini leads with The Andersons.
Scotts is the only brand that appears in every engine top three.
Gemini is also the only engine to surface Lesco, a professional supply brand it ranks first overall.
Perplexity gave a purely technical answer to the open question and named no brands at all in that response.

Why These Brands Win

Slow release nitrogen is the single most cited reason a brand gets recommended here.
All four engines lead with it.
Coverage per bag matters almost as much, because a quarter acre lawn wants one large bag rather than several small ones.
Low burn risk is the third recurring theme and it is the reason Milorganite is named so constantly.
Availability at ordinary retail decides the close calls, which is the most common argument made for Scotts.

Frequently Asked Questions

What lawn fertilizer does AI recommend most?▾

Milorganite leads with 11 total mentions across ChatGPT, Claude, Gemini, and Perplexity in our latest benchmark.

Which lawn fertilizer brand ranks #1 across all AI models?▾

No single brand dominates across all models. Milorganite leads in total mentions but different models have different #1 picks.

Why does ChatGPT recommend different lawn fertilizer than Claude?▾

The four engines agree on the shortlist and disagree on the winner. ChatGPT puts Sunday in first position. Claude and Perplexity both lead with Scotts. Gemini leads with The Andersons. Scotts is the only brand that appears in every engine top three. Gemini is also the only engine to surface Lesco, a professional supply brand it ranks first overall. Perplexity gave a purely technical answer to the open question and named no brands at all in that response.

What lawn fertilizer brands are invisible to AI?▾

Milorganite is named in every response that mentioned a brand and still reaches the top three on only half the engines. It is described as forgiving and hard to over apply rather than as the best choice for the job. A brand in that position is winning consideration and losing the recommendation. Five brands appear on a single engine each. Lesco, Espoma, Expert Gardener, GroundWork and Members Mark have almost no cross engine presence at all. One engine answered the open question with nitrogen arithmetic and named no brand anywhere in its response. That is a reminder that this category can be discussed usefully without naming a single brand.

How we measure this

Each benchmark runs the same standardized prompts across multiple leading AI systems, including ChatGPT, Claude, Gemini, and Perplexity. We use consistent, category-specific questions designed to surface genuine product recommendations — not sponsored results.

Responses are parsed to extract brand mentions, rank position, and frequency. We then analyze cross-model agreement, identify which brands consistently appear in top positions, and flag where AI outputs diverge from marketplace trends.

Seasonal categories are benchmarked weekly during active periods. Results reflect organic AI behavior at the time of testing. Read the full methodology

How this report was produced

Evaluation period: Sep 1
Cadence: Weekly
Prompts evaluated: 3
Review status: Published after human review
Models included: ChatGPT, Claude, Gemini, Perplexity

Full details of how prompts are run, parsed, normalized, and scored are in the methodology, and the platform page explains how the system is built and operated.

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