Weeds And My "Carboard Hack"

One day a former neighbor came by to help with something. He said "I saw you out front weeding around your trees. I like your cardboard hack!" In short, I was putting broken-down boxes around our plantings and covering them with mulch.

Experienced gardeners know this trick, but if you don't, here are some pointers I learned. I did this because 1) I have a lot of Chewy boxes delivered 2) I'm a cheapskate and 3) It saves work.

Here are the basics:

1. break down your large cardboard boxes and remove as much packing tape as possible. Don't fret if you miss some. It will come up to the top of the soil later and you can dispose of it.
2. One layer of cardboard works great. If you have wind, weigh down the corners with old bricks or stones until you have the mulch on.
   
3. Spread your mulch of choice. For ornamental plants up front, that means pine-bark mulch. In the garden? Straw, hay we cut, even dried-out weeds that have not set seed.
4. We go a few inches deep in mulch. Here's an area we covered up a bit late, after the weeds had gotten really tall.

This system really cuts weeding in our humid, hot, and too often like this month, smoky summers. You can safely go in and weed around the cleared area. Copperheads often rest in tall grass and weeds near mating season (August in our part of the world). So bring a hoe to check the area first.

The cardboard will be saturated with the first rain and in time becomes permeable. It cools the soil under it and retains moisture. You can get clever and arrange the pieces to channel water into row-crops and other plantings. I just use it to give me paths that are weed-free, so I don't step on a Copperhead. Here's an ideal finished area.

 In the cool months, or when the garden goes fallow, we let in the chickens. They demolish mulch and cardboard in a few days, eat any remaining bits of plants, and they hunt for bugs. I don't even have to clean up. Any leftover tiny cardboard scraps, save for stray packing tape, disappear after 8 months or so. 

You can find expensive and labor-intensive alternatives. Weed-block fabric works fine for a year, but we'll never use it again. Wire-grass and some other invasive weeds set their runners into the fabric, locking it in place. I had to use a reciprocating saw to cut it out. Black plastic is not permeable but it does block weeds. We have used it in a few spots and covered it with gravel. 

Cardboard does not have the problems outlined above. Give it a go, and save yourself a recycling trip in the process.