To be fair a lot of good product ideas come from personal experiences like yours, not weird. Seems like a solid idea, when you say tailored to location does that account for the different types of grass across geographies? If you're interested in a market snapshot to look at competitors I built a one-time competitive intelligence report tool at stratica.ca covering competitor positioning, market gaps, SWOT, growth action items and more. Could be useful if you want to make it real.

Cheers!