Your garden.
Your tools.
From the first bag of soil to a season of observations. Choose a task, explore the numbers and take the next step outside.
15 free planners, calculators & trackers15 free tools
Free to use · No account neededGarden border planner
Design a border, compare three planting layouts and take away a plant list.
Open toolRaised bed soil calculator
Work out how much soil to order, in litres, cubic metres and bags.
Open toolPlant spacing calculator
Turn your bed dimensions and planting distance into an estimated plant count.
Open toolPot volume calculator
Find the volume inside a pot and how much fresh potting mix to add.
Open toolSeed starting calculator
Work backwards from planting day to sowing and hardening-off dates.
Open toolHydrangea pruning tool
Find a pruning approach for your hydrangea’s flowering group.
Open toolRainwater harvesting calculator
Estimate roof collection, tank space and overflow for a rainfall event.
Open toolGrow light calculator
Compare daily light, lighting hours, electricity use and running costs.
Open toolVPD calculator
Explore air and leaf VPD, humidity and dew point on an interactive map.
Open toolIrrigation calculator
Estimate watering runtime and check how evenly your system distributes water.
Open toolSeed germination tracker
Mark an interactive seed tray, compare two groups and chart germination.
Open toolGreenhouse temperature log
Record inside and outside overnight lows, compare nights and export readings.
Open toolMicroclimate analyzer
Compare sensor readings across growing spaces with charts and heatmaps.
Open toolSeason comparison tool
Compare accumulated heat, rainfall and cold days across two past seasons.
Open toolAquarium water change calculator
Explore nitrate dilution through a series of partial water changes.
Open toolNo tools found.
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Each tool explains its inputs, method and limits. Use the results alongside the plants, soil and conditions in front of you. The guides offer the growing advice a calculation cannot give.
Tools work without an account. Saved plans and logs stay in your browser; imported files are processed on your device. Optional weather requests go directly to NASA.
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