Consult this chart for optimal, even spacing

Sunset  – September 21, 2004

Many annuals are suitable for massing in beds to produce a swath of color. Set out bedding plants in offset rows, so that groups of four form diamonds, as shown above; space them as recommended in the individual plant listings or at the nursery. For even spacing, measure the distance between plants with a piece of wood of the desired length. The chart below shows the area that will be covered by a particular number of plants set out at various spacings.

Recommended spacing
between plants
Area plants will cover
  48 plants* 64 plants*
4 in. 4 1/2 sq.ft. 6 sq. ft.
6 in. 10 sq. ft. 13 1/2 sq. ft.
8 in. 18 sq.ft. 24 1/2 sq. ft.
10 in. 28 1/2 sq.ft. 38 1/2 sq.ft.
12 in. 41 1/2 sq.ft. 55 1/2 sq. ft.
*Plants per flat