Mulching can benefit vegetable gardens too.


Last week I discussed how mulches are used on our landscape beds. Vegetable gardens can also benefit from a good mulching now and then. Often, our goals will determine the type of material used.

In spring, we can speed up the season by using plastic mulches. They act like a greenhouse to warm the soil. Clear plastic warms better than black but it also allows more weeds to grow. A good thing about plastic mulches is that they hold in moisture. A problem is that they don’t allow it to enter in the first place.

Cloth mulches can help in this area. I prefer heavy-duty geotextile cloth. I think it’s worth the investment. This material suppresses weeds and eliminates copious handwork. In a garden situation, it’s usually necessary to remove it after a few years so the soil can be conditioned. Soil compaction between rows eventually becomes a problem.

Organic mulches will eventually turn into compost. Almost any material can be used. Leaves and grass clippings are the most common. When they decompose or weeds begin to be a problem, they can be tilled into the soil to increase organic matter and general soil tilth.

An important thing to remember is not to apply too much at a time. A two-inch layer is ideal. More than that can cause them to mat down and shed water. Also, in the case of dry leaves, they often have a wide carbon to nitrogen ration and additional nitrogen might have to be added. This can be accomplished by adding bagged fertilizer or nitrogen from an organic source like manure.

Sawdust and wood shavings are often used on strawberries. They’re not quite as popular for general vegetable garden use. Plants often become nitrogen deficient during the decomposition process and additional nitrogen must be added to correct it.

Pine straw is another possibility. People are often concerned about lowering the pH of the soil too much, but I think that is overrated. That concern can be overcome by adding a little lime anyway. A little more calcium might just help control blossom end rot on those tomatoes too.

Straw is another material people sometimes use. Like dried leaves and wood shavings, it has a wide carbon to nitrogen ratio. Another problem with straw is that it will contain lots of seed. Sometimes it will look like you planted your garden in wheat. This is not entirely bad. It might be unsightly, but the wheat will not be there forever

Newspaper is another popular organic mulch. Placing it on the garden is a good way to get rid of it. It will eventually decompose and add to the soil. In the meantime, the newspaper will help suppress weeds. The biggest problem I have with it is that it usually dries up and blows everywhere.

Whether you choose to mulch or clean till your garden is a personal decision. Adding organic matter is always a good thing, but some folks prefer to incorporate it immediately and not leave the material on the surface. Enjoy your garden either way.

 

Ted Manzer teaches agriculture at Northeastern High School.

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About tedmanzer

I grew up in Old Town Maine and got a B.S. at the University of Maine in Plant Sciences/ minor in Botany. From there I moved to West Virginia and earned a M.S. in Agronomy at WVU. I also met my wife there. She grew up in rural WV as the daughter of tenant farmers who raised cattle and hogs. Their lifestyle at times was one of subsistence and I learned a lot from them. I've always been a foraging buff, but combining my formal botanical knowledge with their practical 'Foxfire-type' background opened up my eyes a little more. I now teach agriculture to high school students at Northeastern High School in Elizabeth City, NC. My wife teaches with me and we make a great team. I also write a weekly nature/foraging column for the local paper (dailyadvance.com). I also have written several Christian nature/adventure novels that I plan to publish eventually. One is a five book family saga I call the 'Forgotten Virtues' series. In the first book, Never Alone, a young boy comes of age after his father dies in a plane crash, and he has to make it alone. Never Alone is now available in paperback, Kindle and Nook. The second book, Strange Courage, takes Carl from his High School graduation to his recovery from a nasty divorce. The third book, Second Chances, takes Carl from his ex-wife's death and the custody of his son to his heroic death at age 59. The fourth book, Promises Kept, depicts how his grandchildren react and adjust to his death. In the final book, Grandfather's Way, his youngest and most timid granddaughter emerges from the shadow of her overachieving family and accomplishes more in four months than most do in a lifetime. I use many foraging references with a lot of the plants I profile in these articles in those books.
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3 Responses to Mulching can benefit vegetable gardens too.

  1. tonytomeo says:

    Okay, this is where we use the more finely textured compost. It gets weed seeds in it, but by the time the come up, the other plants are way ahead of them. Our compost is not very clean in that regard. It might include diseases from roses, but we do not apply it around roses anyway.

    • tedmanzer says:

      I generally prefer to compost my mulch for this purpose. I like to let weed seeds germinate, then kill them, then repeat. Eventually they can add needed organic matter without as many weeds or pathogens.

      • tonytomeo says:

        Ours is not composted very carefully, although it is pretty good stuff. We get weed seeds that have not yet germinated, as well as a few weed seed that come in from outside the piles.

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