Gardening

Plant spacing, soil, seeds, compost and watering calculators.

12 live · 50+ planned

Calculate how many plants fit in a garden bed.

Calculate how many seeds you need per row.

Balance greens and browns for healthy compost.

Calculate soil needed to fill a raised bed.

Estimate potting soil needed for containers.

Calculate how much water your garden needs.

Calculate actual nutrients in a bag of fertilizer.

Calculate plants per square foot and total.

Estimate the heater size for a greenhouse.

Estimate the total harvest from your plants.

Estimate the coverage area of a grow light.

Find your seed-starting date relative to last frost.