Banishing the Uninvited

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My garden on the mulch

I know that mulches are not traditionally used in vegetable gardens, but flossing, driving cars with decent gas mileage, and using Wikipedia to settle dinner-table debates are not traditional, either, and we find that stuff reasonable at this stage of human development.

When considering whether to mulch your vegetable garden, the great question to ask yourself is, do you want to be Sisyphus, or not? 

Because you are inevitably serving up to nature a nice cozy rectangle of carbon and nitrogen that will get filled.  And I don’t care if you start with sterilized soil in a raised bed.  Eventually, you will get weeds.  And unless you are there to pluck them out every night, they will become overpowering.

My garden off the mulch

Here are a few interesting facts about weeds that I just learned from University of Cambridge botanist David Briggs:

  1. Weeds adapt quickly to all kinds of pressures, including the pressure of finding themselves in an immaculate botanical garden, staffed by many young gardeners with horticulture degrees. In such a situation, some of them flower earlier than they do in nature or in the gardens of the sloppy, hoping to set seed before anybody notices.
  2. Many small-seeded weed species can be lulled into dormancy by even a shallow covering.  In other words, they need light to germinate.
  3. However, many weeds of crop lands produce a lot of seed that is viable for a long time, leaving “seed banks” that persist in the soil…just waiting for some foolish gardener to bring out the rototiller and expose them to the sun.
  4. Seeds of some weeds can persist in the soil a hundred years.
  5. One experiment looked at a wheat field and found in 34,000 seeds in a single square meter.

So, as Susan Harris suggests, rake those fall leaves onto your vegetable beds.  Or order a truckload of wood chips, or bury the place in spoiled hay.  And don’t clear it up in spring.  All your crop seeds require to germinate is a shallow stripe of exposed soil made with the handle end of a shovel. 

Safety first!

Posted by

Michele Owens
on November 19, 2010 at 4:40 am, in the category Eat This.

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12 Comments

  1. 24th March 2015 at 1:45 pm —

    This is a good question that I have been asking myself and if anybody has a good answer I would like to hear it.

  2. 21st January 2016 at 11:40 am —

    Wood chips in the vegetable garden is the number one search that brings people to Outside Clyde. I’ve inter linked several posts and send them off to Linda Chalker-Scott. The word is getting out that mulching your vegetable garden saves major weeding time and improves the soil dramatically. I swear by arborists wood chips. They are the best as far as I am concerned.

  3. 20th May 2016 at 10:22 am —

    I have had a lot of success with fall leaves but straw tend sprout. At least, straw tends to sprout on me.

  4. 5th October 2016 at 7:37 pm —

    WEEDS SUCK
    The TROLL

  5. 30th October 2016 at 7:36 am —

    Zone 9 do not till the mulch into the soil. Just leave it on top. There is no need to remove it ever. When you are ready to plant rake on opening in the mulch and plant. Done.

  6. 11th November 2016 at 8:29 am —

    Zone 9, I’m with Christopher C (and the Troll). Don’t remove it–it will break down on its own. Mulch is the only fertilizer I add to my garden, and my garden generates a ton of gorgeous food.

  7. 12th November 2016 at 10:55 am —

    Oh yeah, and forget the tilling. Not necessary–the earthworms will till for you. Just mulch.

  8. 19th November 2016 at 1:00 am —

    Definitely mulch in the vegetable garden
    1)Helps with weeds
    2)Helps with moisture (hello, lack of rain here in the northeast this past summer)
    3)Breaks down into useable organic matter
    4)Makes your veg. garden look prettier

  9. 24th November 2016 at 7:11 am —

    I’m convinced that some weeds mimic nearby garden plants. I swear I see the same species sporting two distinct leaf shapes or colors depending on what other plants they are living near. Its as if they were smarter than the gardener…

  10. 24th November 2016 at 1:34 pm —

    Anyone have experience mulching large veggie gardens with straw? My church has a half acre garden where we grow food for the homeless. The garden team is pro-till, so we till every year (have already tilled this fall)and this year are mulching the whole enchilada with straw. Any advice on how deep we must mulch to get weed supressing benefits, or whether wood chips are better by far?

  11. 24th November 2016 at 1:40 pm —

    The straw made a huge mess of my veg garden at my old house. Lots of weed seeds came with it, I wished that I had used wood chips. Unless your full time job is weeding your garden, you really must mulch. Nature will fill any void.

  12. 24th November 2016 at 1:46 pm —

    1) Hmmm, “young” gardeners?

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Banishing the Uninvited