- Everything here is free and provided as information, not as a professional lawn or landscaping service.
- We work hard to be accurate — and you should still follow the label on the bag or bottle.
- For anything with a pesticide label, the label is the law. That rule outranks anything a calculator tells you.
- Your yard is your responsibility. We can't see it, test its soil, or know your local rules.
Who these terms are with
LawnToolbox (lawntoolbox.com) is operated by Hamilton Digital Media Limited, registered in England and Wales under number 15608219, registered office 13a Mill Lane, Wimborne, Dorset, United Kingdom, BH21 1LN. In these terms, "we" and "us" mean that company. By using the site, you're agreeing to what follows.
What this site is
A set of free calculators and guides for looking after a lawn, garden beds, irrigation and an indoor grow space. There's nothing to buy from us, no account to create, and no subscription. You can use the tools for your own yard, or for yards you maintain professionally, at no charge.
What we promise about the math — and what we don't
We take the numbers seriously, because they're the entire point of the site. Rates and formulas come from published university extension sources and standard agronomic math rather than from someone else's table. All the calculators and the planner share one calculation engine, so they can't disagree with each other. That engine is covered by an automated test suite checked against reference values, and every result has a "show the math" panel so you can follow the arithmetic yourself.
What we can't do is see your yard. A calculator only knows what you type into it, and the most common source of a wrong number isn't our arithmetic — it's a lawn area that was guessed rather than measured, a bag whose analysis differs from the one entered, or a zone default that doesn't match your microclimate. So we provide the math without a warranty that a given result is correct for your specific yard, and you remain responsible for sanity-checking it before you spread, spray or water. If a result looks wrong, it might be — please tell us.
- The product label wins. If a manufacturer's rate, timing or safety instruction differs from anything here, follow the manufacturer. For pesticides and herbicides, applying off-label is illegal as well as unwise.
- Local rules apply. Many states and counties restrict lawn fertilizer — blackout dates, phosphorus bans, setbacks from water. Watering restrictions vary by district. Our calendar doesn't know yours.
- Don't exceed single-application limits. The calculators warn when a nitrogen target is above the usual cap; the warning is advice, the label is the limit.
- Store and handle products safely, away from children, pets and waterways, and dispose of them as your local authority directs.
This isn't professional advice
The site is general information, not tailored advice for your property, and using it doesn't create a professional relationship between us. For drainage, grading, irrigation installation tied to your water supply, tree work, electrical work around grow lights, or anything that could affect a neighbor's property, consult a qualified professional. For soil, the lab report beats any estimate on this site.
What stays your responsibility
- Measuring your lawn area properly, since every quantity scales from it.
- Reading and following the labels on the products you actually buy.
- Checking local fertilizer, pesticide and watering rules before acting.
- Getting a soil test before applying lime, sulfur or phosphorus in quantity.
- Deciding whether a given result makes sense for your yard before acting on it.
Links to other sites
We link out to retailers, manufacturers and reference sources. Some of those are affiliate links, explained in full in our affiliate disclosure. We don't control other websites and aren't responsible for their content, their products, or their privacy practices — once you leave here, their terms apply.
Content and copyright
The writing, design, code and calculator implementations on this site belong to us. You're welcome to use the tools, quote us with credit and a link, and print or save results and plans for your own use. Please don't republish our articles wholesale, copy the calculators onto another site, or scrape the site automatically.
To be clear about what we're not claiming: the underlying agronomy is public knowledge and nobody owns it. Seeding rates, the pounds-of-nitrogen formula, frost-date conventions and extension calendars are free for anyone to use — it's our particular expression of them that's covered.
Availability
We aim to keep the site up and current, but it's provided as-is. We may change, move or retire tools and articles, and we don't guarantee uninterrupted access.
Liability
To the extent the law allows, we're not liable for loss or damage arising from your use of this site — including damage to turf, plants, soil or equipment, the cost of products or water, or losses from acting on a result without checking it.
Nothing in these terms limits or excludes our liability for death or personal injury caused by our negligence, for fraud, or for anything else that can't lawfully be excluded. If you're a consumer, you keep all the statutory rights you have where you live, and nothing here takes them away.
Governing law
These terms are governed by the laws of England and Wales, and disputes fall to its courts. If you use the site as a consumer somewhere else, you keep the protection of any mandatory consumer law that applies where you live.
Changes
We may update these terms as the site grows. The date at the top of this page shows when they last changed materially, and continuing to use the site means the current version applies.
Contact
Questions about these terms: [email protected]. Something here that's factually wrong: [email protected].