Hoe the bed to pull weeds and any other vegetation. Remove rocks and debris that can interfere with proper root development.
Collect a handful of soil from five areas of the turf bed. Put all samples in the same plastic bag. Submit it to the county cooperative extension service for testing. The lab report will present a pH and nutrient analysis and explain how you need to prepare the soil.
Break the ground to a depth of 4 inches with a shovel and pickax. Rent a rototiller to turn a large bed over.
Broadcast lime and fertilizers as recommended in the lab report. Use the exact quantity stated. Spread 2 inches of compost or other organic matter over the amendments. Till everything 4 inches deep into the soil uniformly. Rake the bed to smooth it out.
Run a lawn roller over the soil surface to firm it and reveal uneven areas. Remove soil from mounding areas and fill sunken spots. Use your shovel to slope the bed away from structures to protect foundations and provide adequate drainage.