Because of
the size of our property, we have a lawn service and they do have some serious
chemical weed killers they can use. However, we don't want anything like that
near our vegetable garden, so other solutions are necessary.
Fabric
The easiest but most time-consuming is pulling weeds as they appear in the garden. Less
simple, much faster, but also somewhat less effective, is using weed-resistant fabric on top of the soil before planting. While it
should be covered with a layer of mulch, weed-blocking fabric can also be used
on its own, though it won't stop as many weeds, nor last as long, due to UV
breakdown. We can usually get two years out of ours without mulch, and three to
four with mulch.
(Speaking of
mulch, it's available in natural
wood and rubber forms,
both shredded. Rubber lasts considerably longer, but isn't always best for food-bearing plants due to possible chemical contamination.)
You can also use layers of newspaper in the same way as weed blocking fabric. The
concern here, like with rubber mulch, is with chemicals leaching into edible plants; many printers use soy-based ink, so
there are safe (or at least, safer) alternatives. Newspaper will generally last one season at best.
Spray
For plants
trying to get into the raised gardens from outside, I use a home-made weed
killing spray:
- 1 gallon of white vinegar
- 1 cup of table salt
- 1 tablespoon of liquid dishwashing soap
Mix these ingredients together and put in a sprayer. I use a large pump sprayer, but a simple spray bottle can work as well.
The vinegar
and salt both work to dehydrate the plants, and the dish soap both helps them
stick and reduces surface tension on the mixture so that it flows better.
For smaller
applications, a mixture of one quart of water per two tablespoons of 91% rubbing
alcohol sprayed directly on the plant can be effective. It works to kill plants
pretty much the same way, by dehydrating them.
For both of
these compounds, the best application time is early on a sunny day. Be very
careful not to get any inside the garden area, as these concoctions will damage
or kill any plant with which it comes in contact!
If you are fighting
weeds with deeper roots, one of the simplest methods is just pouring boiling water onto the plant. Use enough to saturate the soil and burn the roots.
FIRE!!!
Speaking of
burning, the classic propane weed burner can also work well. Two things to keep in mind:
- The charred remains of burned plants can make for excellent fertilizer, nourishing any follow-on plants, so quick follow-up will be necessary to prevent rapid regrowth.
- Never, ever, ever use this method on something like poison ivy. The itching and blistering on our skin is bad enough; it's much worse if it gets into our lungs.
Good luck, and good harvest.
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