How to Graft a Potato & Tomato Plant Together

Written by kategierok
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How to Graft a Potato & Tomato Plant Together
A pomato plant grows tomatoes on top and potatoes underground. (tomato #2 image by Adam Borkowski from

Grafting a tomato and potato plant together results in the formation of a pomato plant---or a plant in which tomatoes grow on the top of the plant, and potatoes grow underground. While these plants sound like something out of a fantasy novel, they do exist---and by following some basic guidelines, you can grow them in your own backyard.

Skill level:
Moderately Easy

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Things you need

  • Potato plant
  • Tomato plant
  • Razor blade/sharp knife
  • Grafting tape
  • Large pot
  • Soil
  • Plastic bag/Saran wrap
  • Water

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  1. 1

    Purchase a healthy tomato plant that is ideally between 6 and 8 inches tall, as well as a potato plant of approximately the same height. Place the two plants next to each other, making sure the stems will touch easily. The tomato plant may need to be slightly elevated to achieve this result.

  2. 2

    Use a razor blade or thin sharp knife to cut a small sliver of the stem from the potato plant, measuring no longer than 1 inch. In addition, the sliver should be no thicker than 1/3 the depth of the stem of the potato plant. Repeat the procedure on the tomato plant, being sure to remove an area that is similar in length and thickness.

  3. 3

    Using a piece of grafting tape, carefully join the two exposed areas of the potato and tomato plants. Make sure the tape is wrapped around both stems, and all exposed areas are covered. Place the plant in a pot filled with soil, and water well.

  4. 4

    Place the plant in an area with minimal sunlight, and watch closely for growth. A bulge in the area of the graft indicates the graft is forming. Once the top of the plant becomes green and lush (after approximately two to three weeks), the time has come to cut the plants.

  5. 5

    Cut the plant slightly below the grafting site, discarding the top half of the tomato plant---however part of the tomato plant should still be exposed above ground. Cover the plant with a clear plastic bag or Saran wrap, providing extra moisture for a few days. Once the plant shows signs of new growth, remove the plastic bag. Water the plant regularly to achieve optimal results. Once your plant becomes too large for the pot, transplant it into a spot in your garden with minimal sunlight.

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