The Q&A Archives: Remove Weeds Before Building Raised Bed

Question: Do I need to get rid of all of the weeds and grass before I start piling up the new soil for my raised garden or will the extra layers of soil kill the weeds and grass? Can I put down the black plastic over the weeds and grass and then put 6 - 12 inches of soil or would plants not thrive in that type of situation? Thanks for you information.

Answer: Twelve inches of soil should smother whatever is underneath, but I still recommend that you till and rake the area first to help "blend" your soil with the "imported" soil. If your soil is clay or otherwise poorly drained, it helps to dig to a depth of 18-24" the area before building the bed. If you're just planting shallow-rooted (to 6") annual plants, your plants will probably grow fine without the extra digging, or with a layer of plastic.

« Click to go to the homepage

» Ask a question of your own

Q&A Library Searching Tips

  • When singular and plural spellings differ, as in peony and peonies, try both.
  • Search terms are not case sensitive.

Today's site banner is by Char and is called "'Diamond Head' Sunrise"