They grow up towards the light, in the hole you put in the cardboard. Most of the weeds are under the cardboard and don't get any light (because the card is blocking it)
If you put spuds in and then covered the entire area with cardboard, the spuds wouldn't break through, they would grow white and spindly under the mulch
If you put spuds in and then covered the entire area with cardboard, the spuds wouldn't break through, they would grow white and spindly under the mulch
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