Free Tools

Interactive calculators built for houseplants and indoor gardening how-tos. No sign-up, no downloads — enter your numbers and get an answer you can act on.

Pot Size & Potting Mix Calculator

Get the right next pot size when repotting and how much potting mix you'll need to fill it.

Fertilizer Dilution Calculator

Work out how much liquid fertilizer to mix into your water at full, half, or quarter strength.