Most bad lawn results don't come from bad products. They come from using the right product on the wrong problem. Moss treatment on a lawn that's actually thin from compaction. Fertiliser on a lawn that needs seed first. A one-size-fits-all routine on a lawn with a specific, fixable cause.
If you're searching for a free lawn diagnosis quiz, this is exactly that: a quick, 60-second online quiz that helps UK homeowners and gardeners identify what’s actually wrong with their lawn and get a personalised care plan built for UK conditions. The RHS's own guidance on dead patches and fixes makes exactly this point: bare and thin patches can look almost identical while having completely different underlying causes, from drought stress to compaction to fuel damage, and it's genuinely difficult to diagnose correctly just by looking.
The fastest way to skip that guesswork is to answer a few honest questions about your lawn before you buy anything. That's what the GREENER lawn diagnosis quiz does. It asks the questions that generic advice usually skips, then matches recommendations to your lawn size, your available time, the right treatment timing, and the problem you're actually dealing with—so you spend less on the wrong products and get better results from the right plan.
What the quiz actually asks
It's four questions, and none of them require you to know anything technical about lawn care:
-
What's your lawn's main problem? Patchy and bare, thin and weak, losing colour, or a new build lawn that's never really established.
-
What have you already tried? So the recommendation doesn't repeat something that hasn't worked for you.
-
How much time do you want to spend on it? Because the right answer for someone who wants a one-off fix is different to someone who wants an ongoing, low-effort routine.
-
How big is your lawn? From up to 100m² through to 300m² and above, so any recommendation is sized correctly rather than guessed at, and if you're unsure, a simple lawn measure tool can use satellite imagery to give a close estimate of your lawn area. You can trace each corner to calculate the size, and if the shape is awkward, measure separate sections and add them together rather than expecting survey-grade figures.
You get your result in seconds, with a plan matched to UK growing conditions, not generic advice written for a different climate.
Why "what have you already tried" for lawn weeds is the most useful question
This is the question most quizzes skip, and it's often the most revealing one. A lawn that's been fed repeatedly when the real issue is missing nutrients, or when the wrong fertilizer was used for that soil, has a different problem to one that's been seeded but never fed at the right time. A proper diagnosis or soil test can reveal nutrient deficiencies and guide your fertilization or soil amendment strategy. A lawn treated with the right products in the wrong order can look identical to one that's never been treated at all, but the fix is different.
Answering honestly here is what separates a genuinely useful recommendation from a generic "buy our biggest kit" upsell, helping you build a healthy lawn without over-applying fertilizers.
What lawn care plan you get at the end
Based on your answers, you'll get a lawn plan matched to your specific condition as one of several online tools that can assess grass health at no cost, along with seasonal tips relevant to when you're taking the quiz. Some tools use uploaded photos for analysis, while this quiz diagnoses through answer-based matching. If a one-off fix suits your situation, you'll typically be pointed toward the Transformation Kit, sized to your lawn for thicker, more green results. To see exactly what results from that kit look like stage by stage, our week-by-week timeline covers day one through week four.
If your answers suggest an ongoing, lower-effort routine fits your situation better, for example, if you said you want to spend as little time as possible on it going forward, you may be a better fit for the Seasonal Care Subscription instead.
Either way, there's no obligation. It's a diagnosis, not a checkout page.
Why timing and soil health are part of the diagnosis too
The quiz doesn't just look at what's wrong with your lawn, it factors in when you're asking. Soil temperature matters more than most people realise: treatments and seed need soil above roughly 8°C to work properly, which in the UK generally holds from April through October. That can mean using lawn feed in spring to improve vigour, sowing grass seed in mid-spring for summer strength, aerating to improve water and nutrient absorption, or using a rake to clear moss when spring conditions are right. Watering advice also shifts in dry weather: aim for early morning or late evening, about 1 to 1.5 inches a week, and enough to reach at least 5cm into the soil. If you're taking the quiz in autumn specifically, our autumn lawn repair buying guide explains why this is actually one of the better windows of the year to act, not a compromise, and the RHS's own autumn lawn care advice backs that up independently.
Why this beats guessing at the garden centre for lawn feed
Standing in a garden centre aisle trying to decide between a dozen products with similar packaging is exactly how most people end up with the wrong thing, or the right thing applied in the wrong order. The Transformation Kit's own product guidance is explicit about this: most lawn treatments fail because of sequence, not ingredients, seeding without preparing the soil, feeding without addressing the actual cause, using one product when the lawn needs a coordinated system. The RHS's guidance on repairing lawns makes the same underlying point independently: recovery depends on treating the correct cause at the correct time of year, not simply buying more product. For example, established lawns often recover quickly after rain, while a new lawn or newly laid turf must be kept moist to establish properly.
A 60-second quiz that asks about your specific lawn before recommending anything removes that guesswork before you've spent a penny.
What past users of GREENER products say
If you'd rather see proof than take our word for how well-matched these recommendations tend to be, our customer reviews include verified feedback from UK gardeners and homeowners, rated 4.94/5 on average. Several reviewers specifically mention getting the right product for their situation on the first attempt, rather than trial and error, which is precisely the outcome the quiz is designed to produce.
Who the quiz is genuinely not for
In the interest of being straightforward: if you already know exactly what your lawn needs and just want to buy, you don't need to take the quiz first, you can go straight to the Transformation Kit or Seasonal Care Subscription product pages. The quiz exists for the much larger group of people who aren't sure which of those two fits, or who aren't sure their lawn's problem is what they assume it is.
FAQ
Is the lawn diagnosis quiz actually free?
Yes. It's four quick questions and takes about a minute. There's no cost, no obligation, and no requirement to buy anything at the end.
What do I need to know about my lawn to answer it?
Nothing technical. The questions are about what you're seeing (patchy, thin, discoloured, or a new build lawn), what you've tried before, how much time you want to spend, and roughly how big your lawn is.
Will it just recommend the most expensive product?
No. The questions are specifically designed to separate people who want a one-off fix from people who'd rather have an ongoing, lower-effort subscription, and the recommendation follows your actual answers rather than defaulting to one option.
How is this different from just reading a buying guide?
A buying guide gives you general information you have to apply to your own situation. The quiz applies it for you, based on your specific answers, and gives you a sized, matched recommendation in seconds. A generic guide cannot tell you when to mow in spring, how regular mowing should change with growth, whether your mower blades are sharp enough, or that you should not mow off more than one-third of the grass blade at once. Independent sources like the RHS confirm that lawn problems with similar symptoms often have different causes, which is exactly why generic advice can only take you so far.
What if my lawn doesn't match any of the quiz categories neatly?
Choose the closest description, most real lawns are a mix of issues. For example, a patchy lawn with moss and weeds may need treatment in the right order before you decide what to tackle first. Weeds compete for moisture and nutrients, selective weedkillers can treat lawn weeds without harming grass, and moss control should come before raking to avoid spreading spores. The quiz result is a strong starting point, and our guides cover more specific scenarios if you want to read further before deciding.
Browse our full lawn care guides
I've already taken the quiz and bought a kit. Can I leave feedback on how accurate it was?
Yes, we'd genuinely like to know. You can leave a review once you've applied your kit, and letting us know whether the recommendation matched your lawn helps other gardeners trust the result too.
