cut a hole so the hollyhocks roots are in the actual soil under the weed cover.... otherwise, they'll dry out in the heat and die.... since they are biennial, the seed they drop will start new plants, but they won't survive unless the plants they make can also touch the base soil....
Can i plant hollyhocks in soil over plastic weed cover?
Yes ...as long as the hollyhocks are in soil ..the roots will figure out a way to go through the plastic to grow deeper into the ground...They have even been known to grow there roots on top of the plastic until they find some soil to finish growing in...just keep an eye out when watering to see if the water is puddling ...sometimes this will cause the roots to rot and the plant will die....if excess water run off ...it shouldn't hurt it .. .I hope that helps
Reply:Of course. That is the purpose of the weed block, to be a barricade between your top soil and the weeds\weed seeds. Does your weed block have drainage holes so the water can pass through? If not, you could end up with water build up and that can cause your plants to rot from the roots up.
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