Landscape fabric suppresses almost all weeds in a flower garden, while still allowing moisture, air and nutrients to seep through and into the soil. The fabric last longer than plastic mulches, which makes ongoing maintenance simpler. Use fabric mulch only in perennial beds where the plants are rarely replaced. Frequent digging and replanting shreds the fabric so it no longer blocks weeds or provides a benefit to the garden.
1. Prepare the flower bed for planting. Remove all weeds and unwanted plant debris. Till in any needed amendments, such as compost or fertilizer, and smooth the planting bed with a rake. Dig a 2-inch-deep trench around the perimeter of the bed.
2.Cut a length of landscape fabric 4 inches wider than the bed. For large beds, cut multiple sheets and figure in a 3-inch overlap for each sheet.
3.Lay the landscape fabric over the top of the bed, overlapping the edges of multiple sheets so weeds don't grow between the seams. Tuck the edges of the fabric into the trench and fill it with soil to anchor the fabric.
4.Cut a small X-shaped slit for each plant. Fold the edges of the slit under the fabric and plant the flower through the slit.
5.Cover the landscape fabric with a 1 to 3 inch layer of bark or wood-chip mulch. The bark improves the bed's appearance and protects the fabric from UV rays and damage, which prolongs its life.