Pennywort

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Is there a way of permanently eradicating this nuisance 'weed'. I have diligently hand weeded over past years and it still persists. I am not able to change the growing environment as its in a natural stone wall which is pretty much permanently damp except in summer.
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https://www.wildfooduk.com/edible-wild-plants/pennywort/
Why do you want to eradicate it?
Its smothering areas where I want to cultivate and grow veggies, not only does it grow in the wall it also smothers the ground.
There will be a reservoir of ungerminated seeds in your soil beside the wall, so even if you spray plants in the wall with glyphosate before they seed, or pull them by hand, you will still have them coming up for some time.
However, on the bright side, the roots of this plant are relatively feeble, so removing it from the areas you want to cultivate will be a regular, but easy task. Eventually the seed reservoir will be depleted and persistence is the key.
Put it another way; I'd swap your Navelwort for my annual meadow grass any time! For a start, that grass can grow and set seed in around a month, whereas Navelwort takes a whole season to seed.
It's nibbled here on Exmoor while out walking.
But check throughly if you think of tasting that that's what it is before you do!
The only normal people you know are the ones you don’t know very well
P.S. Not far, but not up on Exmoor. Been there, done that.... Brrrr!
Why am I in this handcart and where are we going ?