The best replacement for topsoil is compost.

The best alternatives to topsoil are rated as following:
★★★★★  compost
★★★★★  potting soil
★★★  mulch
★★  fill dirt
★★  subsoil
★★  loam
★★  sand
★  dirt
★  topsoil
★  garden soil
  potting mix
  black dirt
  soil
  screened topsoil
  triple mix
  black earth
  sandy loam
  loom
  field dirt
  top dressing
  fill
  bag topsoil
  unscreened

Your alternative for topsoil is not listed? Suggest!
Speaking about topsoil, one probably shouldn't forget about grass seed.

Other search terms related to topsoil and their ratings are:
★★★★★ grass seed
★ manure
★ potting soil
★ peat moss
You have in mind a companion for topsoil and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of topsoil in all years. Click on graph for more.
topsoil
compost
potting soil