What you will need:

  • 10cm x 120cm piece of wood
  • Table Saw

Method:

  1. Take your piece of wood and bevel one of the long edges with a table saw – shave it at a 45-degree angle.
  2. Along the other long edge, cut alternating deep and shallow triangular notches at 15cm intervals.
  3. When planting seeds or setting out young plants, use the sharp edge to help make a furrow.
  4. Lay the board on its side, and use the intervals to help you space the seeds and seedlings evenly.

Note: different plants need different gaps. Lettuce needs 15cm intervals while tomatoes need about 60cm intervals.