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Black Plastic Weed Deterrent

In an effort to try to keep the weeds in the vegetable garden down, we mulched our vegetable garden with a sheet of inexpensive black plastic bought from the hardware store (not the more expensive stuff from the garden center).


We cut holes for the tomato and zucchini plants, and wide slits for the rows of beans, and then punched holes in the black plastic all over with the spikes from the bottom of the tomato cages, to let more water in. We anchored the sides of the plastic with dirt/rocks.

This method has worked well; it keeps the weeds down to almost none (less labor), and keeps the moisture in the soil under the plastic (less watering). We have had our best tomato yields ever using this method, and the plastic can be reused for years.

By Ness

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By (Guest Post)
July 8, 20040 found this helpful

Black plastic certainly works well but most gardening books don't recommend it as it can be harmful to the soil. Soil is a living thing - teeming with bacteria and fungi which work to break down organic matter and free up nutrients for the plant roots. Plastic starves this microflora. It also adds nothing to the soil. It may give good results for a few seasons but the soil will deteriorate eventually. It shouldn't do too much damage if you use it for a short growing season and then remove it for the rest of the year but its better to use an organic mulch for vegetables as most of them live their entire life cycle in one season so they need a nutrient rich soil.


A mulch such as pea straw, lucerne hay, or even newspaper covered with a mix of pulled weeds, leaves and grass clippings would be better and this will break down to enrich the soil. Look around your local area to see what organic waste is plentiful - ten it will be cheap. The few weeds that do grow are very easy to pull out from a mulch.



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By John (Guest Post)
June 27, 20050 found this helpful

First year to use back plastic on pole bean, bush bean, and other assorted plants. The results are great less weeding in hard to weed areas.

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By JB (Guest Post)
August 6, 20050 found this helpful

Have not tried black plastic, I am trying newpapers keeping them wet.

Any comment

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By Kay (Guest Post)
June 15, 20070 found this helpful

Every year after planting my garden, I lay three layers of newspapers down around the plants, soak them good with the hose and cover with grass clippings - I never need to weed the garden. The clippings and newspapers rot away during the winter and are tilled under in the spring.

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