I've noticed a lot of recommendations for using cardboard as a weed barrier under raised vegetable gardens, but I'm worried about the chemicals it might contain, like insecticides, fire retardants, and petroleum-based adhesives. It seems counterintuitive to use something that might be harmful near the food we're growing. Has anyone else thought about this?
3 Answers
Most cardboard used for gardening is actually pretty safe, especially if you choose plain brown cardboard without any colorful inks. The glues used nowadays are biodegradable too, so I wouldn’t stress too much about those chemicals making it into your food. It’s widely considered a great way to suppress weeds!
I totally understand your concern! I used some unwaxed cardboard for my organic veggies, mainly because it was free and I felt it was a better option than letting it go to waste. I think it helps as a weed barrier, but if you have specific worries, it might be worth sharing sources for your claims. It’s always good to be informed!
Honestly, I'd say cardboard is fine for gardening. I think the fears about harmful chemicals are a bit overstated. Just avoid glossy or colored cardboard, and you’ll be fine. Plus, it’s compostable, which is a bonus for the garden!