Hello Pamela, Killing Oxalis is not that difficult if you have enough time. I understand that you removed all plants you want to keep from the infested bed so that there is no need to care for any desirable plant amongst the weed. If you have time to wait a full growing season, my recommendation is to cover the whole bed with a material which excludes light. I understand that the Oxalis in question is not Oxalis pes caprae but another species which produces bigger bulbs than pes caprae. But to my knowledge any bulbous Oxalis forms a new bulb each season (Please correct me if I am wrong). To do so the plant needs light to photosynthesize. My recommendation is based on the experience I made here in Portugal with Oxalis pes caprae. Some parts of my new garden are so heavily infested with this Oxalis that it smothers practically everything else. It gets worse when the soil is worked, especially after rotovating. So I used the woven black plastic cloth which is used in nurseries to stand potted plants on. It lets air and water through but not light. (There are different qualities available, use the heaviest one) This was spread on the soil after it was rotovated, raked even and the cloth fixed with stones. The Oxalis sprouted beneath and was so dense that it lifted the cloth from the ground but the shoots were pale yellow. I walked over the cloth to smother the pale shoots under the plastic and to avoid it being lifted high enough to let light in at the edges. The plastic was left until late spring and and then the area was planted with vegetables and irrigated. To my surprise in autumn, when Oxalis pes caprae started to sprout in other parts of the garden, nothing came back in the previously covered area. I was apprehensive because the shoots were so dense under the cloth. This way I did not use herbicides nor did I do any weeding. But the area was clear of any plants and could be covered entirely and I had the time to wait. I use the same technique now in between established plants regardless if the weed is winter or summer growing or both. A good material is strong cardboard which is flattened and weighed down with stones (I have plenty of stones...) Cardboard lasts long enough to kill the Oxalis or other weeds but then disintegrates and can be worked into the ground like other mulch material. Sometimes I also use cut open compost bags. They are of strong plastic and resist the UV light but have to be removed and do not let air and rain through. it is okay in small patches. A disadvantage of these methods is that they privide cover for pests like rodents or slugs. I would also like to share another experience I made with Oxalis: I lost a whole collection after it moved from my old greenhouse with acrylic glass in the roof to the new one with laminated true glass in the roof. The building permission for the new greenhouse forced me to install a laminated glass plus an extra pane of safety glass which means in total 4 layers of material. This absorbed so much light during winter (not detectable to the human eye) that my Oxalis dwindled away during two or three seasons. In both greenhouses the Oxalis was housed close to the glass in the roof. I have no personal experience with the solarizing method Nan recommends but have my doubts that it would work in winter. Hope that helps, Uli _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…