Garden and Houseplant Calculators
Plan watering, soil mixes, fertilizer strength, pot sizes and planting dates for houseplants and garden beds, and check how much sun a window gets, so the plant gets what it needs instead of what the calendar says.
6 garden & plants tools
Window Sunlight Exposure Estimator
Pick the direction a window faces (north, south, east or west) and the season to see the hours of sunlight per day and the light intensity.
Plant Watering Frequency Calculator
Pick the plant, the pot size and your climate to see how many days to leave between waterings.
Houseplant Fertilizer Dilution Calculator
Enter the amount of water and the dilution ratio (1:10, 1:20 and so on) to get the exact amount of liquid fertilizer and avoid fertilizer burn.
Tomato Growing Start Date Planner
Enter your last frost date to see when to start tomato seeds indoors and when to transplant them outside.
Garden Soil Mix Ratio Calculator
Enter the total volume in litres to get the amounts of peat moss, compost and perlite for a potting mix.
Plant Repotting Pot Size Calculator
Enter the diameter of the current pot to get the pot size to move up to. The rule of thumb: 1 to 2 inches wider.