Posted: 17/10/2014 at 10:08
Hi all. I took on an allotment in June that has some horsetail. I want to plant some asparagus crowns and have earmarked an area suitable. It is currently covered in cardboard and is the last area that needs digging and weeding. I am sure the surface weeds will have died back, but the rhyzomes of the horsetail will still be deep underground & no matter how deep i try to dig them out, they will still lurk under the soil.
Having done as much weeding etc,possible, My thinking is, that if I dig the trench for the crowns, and install a layer of cardboard on the bottom and then the manure/soil mound put on top , would this be ok and sufficient in drainage etc for the asparagus + prevent the horsetail coming through? Alternatively, should I just use black plastic around the plants as they come through in Spring? Any other suggestions would be very welcome