GardenCalc
What data we collect
If you sign up for our newsletter using the form on this site, we collect your email address and limited sign-up metadata such as the page or campaign source that sent you to the form.
We don't ask for your name, postal address or payment details in the newsletter form. We also describe cookie-based data below in the Cookies section.
How we use your data
Your email address is used to send you the GardenCalc newsletter with seasonal gardening tips, calculator updates and the occasional useful link. Sign-up metadata helps us understand which forms and campaigns are working and troubleshoot subscription issues.
We never sell, rent or share your email address with anyone for their own marketing. You can unsubscribe at any time using the link at the bottom of every newsletter.
Processors and service providers
We use trusted processors to run GardenCalc and manage newsletter sign-ups:
- Vercel — hosts this site and the serverless subscribe API. Vercel may process request metadata while delivering the site and API; its data processing addendum is at vercel.com/legal/dpa. Data is encrypted in transit (TLS) and Vercel is SOC 2 Type 2 certified. Runtime logs are retained by Vercel for between 1 hour and 30 days depending on the hosting plan and observability settings, and are not used by us for marketing. Under normal operation we do not log your email address — only the timestamp and the sign-up's traffic-source tags (UTM source and medium) are recorded. In the rare deadletter-recovery case where neither Convex nor Beehiiv was able to store your sign-up, your email address is written once to Vercel's runtime logs so we can re-enter it by hand rather than lose it; that entry is purged at Vercel's standard log-retention horizon and is never used for marketing.
- Convex — stores subscriber records for email addresses and sign-up metadata. Convex's data processing agreement is at convex.dev/legal/dpa. Data is encrypted in transit (TLS) and at rest, and database access is restricted to administrative API keys held only by the site owner. Subscriber records are kept while needed to run the newsletter or honour legal and unsubscribe requests; deletion requests are completed within 30 days.
- Beehiiv — delivers the newsletter and manages unsubscribe preferences. Beehiiv's data protection addendum is at beehiiv.com/dpa. When we send the newsletter through Beehiiv, it processes your email address plus delivery and unsubscribe data needed to provide the service; every newsletter includes a one-click unsubscribe link, and API access is restricted to administrative keys held only by the site owner. Beehiiv's DPA says customer personal data is destroyed within 30 days after account termination unless law requires longer storage.
These providers process personal data only to provide their services to GardenCalc, under their published data processing terms. We remain responsible for how your data is used and do not sell or rent your email address.
Cookies
This site uses cookies from two third-party services:
- Google AdSense — serves adverts on this site. AdSense may use cookies to show you relevant ads based on your browsing history. You can manage your ad preferences in Google's Ad Settings.
- Google Analytics — helps us understand how people use the site (which pages are popular, how long visits last). No personally identifiable information is stored. You can opt out using the Google Analytics opt-out browser add-on.
You can disable cookies entirely in your browser settings. The calculators will still work, but some features may not function as expected.
Your rights (GDPR)
If you're based in the UK or EU, you have the right to:
- Access the personal data we hold about you
- Ask us to correct or delete your data
- Withdraw your consent at any time
- Lodge a complaint with the Information Commissioner's Office (ICO) if you're unhappy with how we handle your data
To exercise any of these rights, just email us.
Contact
Questions about this policy? Email hello@gardencalc.uk. We aim to reply within 48 hours.