What AI Lawn Fertilizer Recommendations Revealed in 2026

Scotts and Milorganite repeatedly appeared near the top of RecoScope’s lawn fertilizer benchmarks. The more useful finding for brands is what happened beyond that shared visibility: AI systems differed on which brand to put first, how to interpret a budget, and which alternatives to name.

From March 26 through October 10, 2026, RecoScope published 12 lawn fertilizer snapshots across ChatGPT, Claude, Gemini, and Perplexity. As we pause the category in our active rotation, the archive offers a record of recurring recommendation patterns and the measurement problems that can make those patterns look more certain than they are.

A familiar pair dominated mention frequency

In the stored mention records, Scotts and Milorganite occupied the top two positions by frequency in 11 of the 12 published snapshots, including ties. For this recap, each normalized brand is counted once per model and prompt within a snapshot. In the earliest snapshot, Scotts and The Andersons tied for the highest frequency, with Milorganite next.

That repeated presence is the strongest descriptive pattern in the archive. It shows that these brands were frequently available to the AI systems as answers to our homeowner questions. It does not establish why they appeared, whether a shopper purchased them, or whether they were the best products for a particular lawn.

Being mentioned and being chosen first are different

The October 10 collection makes the distinction clear. We captured three prompts across four AI systems, producing 12 raw responses. Two responses were excluded from the aggregate, leaving 10 eligible responses and 34 mentions across nine brands.

• Scotts: 10 of 10 eligible responses
• Milorganite: 9 of 10 eligible responses
• The Andersons: 5 of 10 eligible responses
• Jonathan Green: 2 of 10 eligible responses
• Lesco: 2 of 10 eligible responses
• Pennington: 2 of 10 eligible responses
• Simple Lawn Solutions: 2 of 10 eligible responses
• Expert Gardener: 1 of 10 eligible responses
• Sta-Green: 1 of 10 eligible responses

Only four eligible responses contained explicit ordinal brand rankings. Scotts ranked first in two, The Andersons in one, and Milorganite in one. The other six responses contributed to mention frequency without being assigned an inferred ranking.

For a brand tracking its visibility, these measures answer different questions. Mention frequency describes how often it entered the answer. An explicit first-place ranking describes its position in the subset of answers that actually ranked brands.

Budget questions exposed a coverage problem

Our budget prompt asked about fertilizer under $40 for a homeowner maintaining a quarter-acre lawn. Several October answers named products priced below $40 per bag or bottle while describing coverage that would require multiple packages for the stated lawn.

The systems also interpreted the request differently. Perplexity’s budget response selected Expert Gardener based on its claimed coverage for a full application. Gemini emphasized Lesco. Other answers returned familiar brands while adding qualifications about bag size and the amount of actual turf.

These are observations about the answers, not verified product prices or coverage claims. They suggest a useful question for brands to investigate: does the information available about a product make the cost of treating a defined area easy to understand? Package price, application rate, and coverage need to work together for an answer to satisfy a shopper’s budget.

Challenger visibility depended on the question and system

The Andersons repeatedly appeared alongside the leading pair. Brands such as Lesco, Pennington, Jonathan Green, Sunday, and several store brands appeared less consistently across the archive.

That variation is a reason to examine individual responses. A brand can appear in a budget answer, an alternative product list, or an explicit comparison ranking. Those appearances have different meanings even when they each contribute one mention.

Because prompts and collection conditions changed during the year, the archive does not support a clean claim that a particular challenger gained or lost visibility because of its marketing. The useful next step is to inspect the contexts in which it appeared and test those contexts consistently.

The measurement limits matter

The 12 published snapshots contain 132 saved raw responses. The earliest snapshot has stored mention records but no saved raw answers. Household descriptions changed across later prompts, and some older prompts abbreviated the context. Historical records also contain duplicate entries for the same brand in the same model response; the frequency observation above removes those duplicates.

Historical ranking records and the October extraction also use different approaches. October assigns numeric ranks only when an answer explicitly ranks brands. We therefore do not combine the season into a single ranking, a pooled visibility percentage, or a continuous growth trend.

In the final collection, the ChatGPT budget response introduced Las Vegas as a possible climate context even though the prompt supplied no location. The Gemini comparison response contained conflicting ranking tables. Both raw answers were retained and excluded from the aggregate. Perplexity’s advanced-search preview varied across prompts, leaving an additional comparability caveat.

What brands can take from the archive

The recurring visibility of Scotts and Milorganite gives brands a concrete benchmark to investigate. The variation underneath them shows why a single overall score is insufficient: discovery, budget fit, and explicit preference should be examined separately.

A practical content audit would ask whether a shopper can find clear answers about grass type, application timing, treatment coverage, and total application cost. This dataset identifies those questions as useful areas to test; it does not prove that changing a page will change an AI recommendation.

Lawn Fertilizer is now paused in RecoScope’s active rotation, and its published history remains available. Robot Vacuums takes its rotation slot. Its next collection will establish a fresh baseline under the current collection method.

Explore the lawn fertilizer archive · Read the October 10 snapshot