Almost nothing will smother the Oxalis. I used to have a major problem with it. Roundup in a stronger than suggested solution works well, with a small applicator bottle with the stronger mix to apply to "volunteer" ones amongst other plants. If you plant Amaryllis over Oxalis, you will not get rid of it, and have trouble to ever get it out of the Amarylis. Ina > 2012/7/23 Gastil<marygastil@yahoo.com>: > as long as they make piles of thick dark leaves to smother the Oxalis. -- Ina Crossley Auckland New Zealand Zone 10