ᐅ Preventing weed growth on excavated areas

Created on: 5 Jul 2021 10:18
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Colorblind
Hello everyone.
We are currently planning our outdoor area and are doing as much as possible ourselves.
We have already had the future lawn area excavated, since large trucks cannot easily access the site after the terrace and other surfaces are installed. Early next year, we plan to fill the area with 20 to 30cm (8 to 12 inches) of topsoil once all the paving and other surfaces are completed.

Now we have a serious problem with weeds, especially thistles, and I have been considering covering the excavated area. The question is: Is this effective, and can it help control the weeds well? Would it be better to use an opaque landscaping fabric or a tarp for this purpose?

Thank you very much and best regards 🙂

Baustelle im Freien mit aufgeschütteter Erde, Kieshaufen und Wald am Rand.
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HeimatBauer
14 Jun 2023 13:47
Green manure has many advantages: it occupies the space and also reveals anything that doesn’t belong, so you can remove it before the lawn area is fully established.
I had a lot of weeds in the subsoil layer, which were spread extensively through the mulching process. Although fresh topsoil was added at depths of 10-30cm (4-12 inches) depending on the area, the weeds still grew relentlessly through it. At first, I removed them by hand, but eventually the lawn surface was closed and the weeds started growing from deeper layers — at that point, pulling them out would have left 30x30cm (12x12 inch) holes. Once the lawn is finished, it’s no longer practical to do this, but with green manure, it’s not an issue. So whatever cover crop or green manure you use: start monitoring now for any weeds that appear and remove them by hand.
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ypg
14 Jun 2023 18:45
Bertram100 schrieb:

Then just cover everything with cardboard. You can leave it there, it will decompose over time and provide good nourishment for earthworms. You can put the additional soil on top of the cardboard later. Make sure the cardboard is not too brightly printed.

The thread is 2 years old and the garden is surely already established…!
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Bertram100
14 Jun 2023 19:00
ypg schrieb:

The thread is 2 years old and the garden has certainly already been laid out…!

Oh, I didn’t notice that. Well, no worries. I haven’t caused any damage here.