Is Cardboard an Effective Weed Barrier for Long-Term Use?

Honestly, I think cardboard might just be a passing trend that’s not as effective as people claim. It doesn’t provide long-term weed control and in reality, weeds can still thrive on top of it. Plus, some cardboard has harmful dyes that could leach into the soil. I believe that real weed prevention comes down to consistent maintenance and using the right strategies tailored to the specific plants you’re dealing with.

It's important to understand how weeds spread before relying solely on cardboard. Seeds can blow in from nearby areas or be carried by animals, and while cardboard can stop some unwanted plants from rooting, it won’t prevent all weeds. If it’s not properly maintained, you'll still end up with germination on top of the cardboard after a while. Long story short, it can help if you're looking to clear an area, but don’t expect it to be a permanent fix. Regular maintenance is key, like identifying and hand-pulling the weeds that do pop up.

Using cardboard as a weed barrier can actually be pretty effective. It absorbs water well and eventually breaks down, which helps keep the soil moist underneath. I typically place it under a thick layer of shredded wood mulch. Over time, it blocks light from reaching weeds, causing them to die off. However, tap-rooted weeds can still survive if they find a spot where the cardboard is worn through. It usually takes about a year for the cardboard to decompose, and I've noticed that the soil under it tends to stay damp compared to areas just covered with mulch. Try it out in a small part of your garden to see how it works for you!

In my experience, cardboard doesn’t restrict water at all. It can last a season or more, depending on how much you’re willing to manage the weeds in that area. Personally, I find it works better than plastic or fabric, but I still have to be proactive about weeding."