Hey everyone! I'm in a bit of a tough spot with my garden because my house sits on land that was previously contaminated with PFOAs, a cancer-causing chemical. Until I can get this soil tested, I can't grow anything directly in it. I'm looking to create a large raised bed for vegetables—around 40 square feet—where nothing can touch the ground soil to avoid any contamination. Has anyone here built something like this before, or do you have any suggestions on how to safely set up a raised bed of that size? Would love your thoughts on materials or designs that could work for my situation!
3 Answers
I built a 4x8 raised bed that's 2 feet tall and so far, it seems like no leaching is happening. You could also try putting down plastic at the bottom to prevent any contact with native soil if that worries you. Plus, there's always straw bales on plastic sheets—they're inexpensive and you can use new bales each year! I'm really happy with the results so far!
Honestly, I think going for multiple smaller raised beds might be better. They’re easier to manage and will save you a bit on construction costs. Plus, you can mix plants in pots that sit on pavers to avoid contact with the soil. It’s a shame you have to deal with this, but there are definitely workable options!
Yeah, I’ve heard about growing towers as well! They take up less space but still let you grow a variety of veggies.
You might want to check out sub-irrigated planters! They use a pond liner to keep the soil from touching the ground soil below, which could solve your contamination issue. You could build a larger version similar to what you find at the link I shared. If construction isn’t your thing, consider using grow bags in kiddie pools or DIY buckets that act as self-watering planters. Also, hydroponics could be an interesting route if you're open to it, but I get wanting to keep it outside!
I like the idea of using grow bags! Just a heads-up, though, roots can still sneak into beds regardless of the barriers, so elevating everything on legs might be a good move.
That sounds sturdy! What size wood did you use for the frame? I'm thinking that could work perfectly for my needs!