Report a calculation issue or outdated guidance
The fastest way to improve a calculator is a report that can be reproduced.
Use this address for calculator errors, source updates, broken links, accessibility issues or a suggestion for a genuinely useful garden-planning tool.
For a calculator issue
Please include the page name, the values and units you entered, the result shown and the result you expected. If the issue depends on a supplier product, include the relevant pack size, rate or specification.
For outdated guidance
Include the source or product page that has changed and the section of Gardeners Toolkit that needs reviewing. Product-specific information is kept separate from general planning guidance, so context matters.
What this mailbox is not
It is a site feedback route, not a staffed gardening consultancy or emergency support service. Gardeners Toolkit cannot provide structural, electrical, water-safety or other professional site-specific advice by email.