Over the years, I've lived in a lot of houses. Rented houses with struggling lawns. Bought homes with yards that needed work. And every single time, the process was the same — something was wrong with the grass, I'd try to figure out what, and I'd end up buried in a pile of contradictory, context-free advice that had no idea where I lived or what kind of grass I was dealing with.
One of my most memorable lawn failures happened when I decided to overseed a thin, patchy yard. I did what seemed obvious — scattered grass seed across the lawn and watered it. Nothing grew. What I didn't know, and couldn't find explained clearly anywhere, was that grass seed needs soil contact to germinate. You have to scratch it in, cover it, give it something to root into. I'd done the effort and spent the money and had nothing to show for it, because the information I found never quite said the thing I actually needed to know.
We moved into a new house in the Pacific Northwest. Beautiful yard, terrible moss problem. I knew there were products for this — moss killers, lawn treatments — but I had no idea which one to buy, when to apply it, how much to water after, whether to mow first or after, or whether the product I was looking at actually did what the label claimed. I spent an afternoon at the garden center feeling like I was being marketed to rather than helped. Every product promised everything. None of them told me what I actually needed to know for my specific lawn, in my specific climate, at this specific time of year.
That afternoon was the clearest version of a frustration I'd felt for years. The information exists. Agronomists and turfgrass scientists know exactly when to apply pre-emergent in a Pacific Northwest climate, which grass types are susceptible to which fungal diseases, what the difference is between iron chlorosis and nitrogen deficiency when your grass turns yellow. But that knowledge lives in university extension publications, professional forums, and behind consultation fees — not on the packaging of the product sitting in front of you at the store.
The problem with
existing advice
If you Google "why is my lawn brown," you'll find plenty of articles. They'll list eight possible causes. They might mention regional variation in passing. They'll recommend products generically. What they won't do is look at your specific lawn, in your specific city, in this specific month, and tell you what's actually happening and what to do about it.
The result is homeowners doing what I did — guessing. Buying the wrong product. Applying it at the wrong time. Watching it not work and not knowing why. Then either giving up, hiring someone expensive, or starting the Google cycle all over again the following season.
"There's so much selection at the store, and it feels like you're being marketed to rather than helped. I wanted a tool that would just tell me what was actually wrong and exactly what to do about it."
I also grew deeply skeptical of combination products — the "weed and feed" type formulas that claim to do three things at once. In my experience, and from everything I've read, the timing requirements for each function of those products are often contradictory. Pre-emergent and fertilizer have different seasonal windows. You can't always optimize for both at once. These products exist because they're convenient to sell, not because they're the best solution for your lawn.
Why diagnosis
changes everything
In many fields — medicine being the clearest example — you don't treat before you diagnose. You look at the clinical signs, narrow the possibilities, confirm the most likely cause, and then choose a treatment that matches the actual problem. That systematic approach is why treatment works. It's also why random guessing at the garden center doesn't.
GrassDx applies that same logic to lawn care. Upload photos of what you're seeing. Tell us your ZIP code. We'll tell you what's actually wrong — not eight things it might be — and give you a treatment plan that accounts for your grass type, your climate, and the time of year. The right product, applied the right way, at the right time.
Not a combination product that promises everything. Not generic advice written for a nationwide audience that doesn't know whether you're in Houston or Seattle. The actual answer, for your actual lawn, right now.
Built to last,
free forever
I've built businesses before. I know what it looks like when a product solves a real problem versus when it's solving a manufactured one. The lawn care information gap is real — I've lived it across multiple homes, multiple climates, multiple grass types. And the solution isn't complicated. It's just applying what agronomists already know, localized to where you actually are, delivered at the moment you need it.
GrassDx is free because it should be. The information exists. The technology to deliver it intelligently now exists. The only thing missing was someone deciding to build it — and making sure it was actually good.
We're based in Seattle, Washington. We're just getting started.