How to feed your plants

Fertilizer and compost replace what hungry plants use up. A little, at the right time, is plenty.

Words to know

Fertilizer numbers (like 10-10-10):
The amounts of nitrogen, phosphorus and potassium, always in that order. Nitrogen grows leaves; phosphorus helps roots and flowers; potassium helps fruit and overall health. Equal numbers mean balanced.
Compost:
Rotted plant matter. It feeds the soil slowly and gently.
Side-dress:
Scatter fertilizer or compost in a ring around a plant during the season.

How to do it

  1. Use the amount on the package — more isn't better. Too much gives big leafy plants with little fruit, and can burn roots.
  2. Sprinkle it in a ring a few inches out from the stem, not against it.
  3. Scratch it lightly into the top inch of soil.
  4. Water it in.

Good to know

  • Liquid feeds (like fish or seaweed) mix with water and work fast; granules release over several weeks.
  • Carrots, beans, peas and most herbs need little or no extra feeding.

Based on standard guidance from U.S. university extension services, including Cornell, the University of Minnesota and Oregon State.