Gardening Resources & UK Directories

Gardening resources we rate

GardenCalc is a free set of UK gardening calculators, but the calculators do not work in a vacuum. This page collects the directories, communities and data sources we genuinely rate: the places we point people to, and the authorities our numbers are checked against.

Run a UK gardening website or directory and want to swap links? Email hello@gardencalc.uk. We are happy to link to genuinely useful gardening resources.

UK gardening directories and communities

A handy way to find local gardening services, suppliers and fellow gardeners. These are UK-focused gardening directories and communities worth a look:

The Garden Directory — a human-reviewed directory of UK gardening and landscaping businesses, blogs and resources.
Garden Forum — a long-running community where UK gardeners swap advice and answer each other's questions.
Landscape Juice Network — the UK network for professional landscapers and gardeners.
Gardenzine — a free UK gardening magazine with a classified directory.

Trusted data sources

Every figure in our calculators is checked against published UK authorities. If you want to dig into the source data yourself, start here:

RHS — Royal Horticultural Society — sowing and planting calendars, lawn feeding rates and pest advice.
Met Office — UK climate averages — the 30-year frost and rainfall data behind our frost date and water butt tools.

Our free calculators

Looking for a specific tool? Every GardenCalc calculator is free, needs no signup, and uses UK units and product sizes:

Grass Seed Calculator — how much grass seed for a new lawn, overseeding or bare patches.
Compost Calculator — compost in litres, bags and bulk bags for any project.
Topsoil Calculator — topsoil for raised beds, borders and containers.
Gravel Calculator — gravel and decorative stone for paths, drives and patios.
Frost Date Calculator — your last and first frost dates by UK postcode.
Planting Calendar — what to sow and plant each month across 30+ UK vegetables.

See the full list of calculators or read more about GardenCalc.