Keyhole Garden Step 1
Tie the longer string to a stake at the center where you will build the keyhole garden and hold a stick at the opposite end. Drag the stick in a full circle, outlining the circumference of the keyhole garden. Repeat with the shorter string. You will now have two circles with the same center. The inner circle will have a diameter of about 30 cm and the outer circle will have a diameter of 2.5 to 3 m. Draw the keyhole section that allows access to the center column.
