Terms of Use, SoilPhCheck
What this site is
SoilPhCheck reports typical topsoil pH for US counties from the USDA soil survey and applies a published, documented rule to say whether lime or sulfur is likely to help a given plant. It is informational only. It is not a soil test, and it does not know what is in your yard.
No warranty on the figures
Every figure traces to a public USDA record, but soils vary within a county, yards are often disturbed or filled, and survey data can be decades old for some areas. Nothing here is guaranteed to match your soil, and no amount on this site should be applied without a soil test confirming the starting pH. Over-liming or over-sulfuring is slow and difficult to reverse.
No professional advice
Nothing on this site is agronomic, horticultural or legal advice. Follow the label on any product you apply, and for anything beyond a home garden, consult your state's cooperative extension service.
Content and links
Site content, design and the decision model are the property of SoilPhCheck unless otherwise noted. USDA soil data is public. External links are provided for convenience; SoilPhCheck is not responsible for third-party sites.
Changes
These terms may be updated as the site changes. Continued use after an update means you accept the current version.