Dirk from San Diego, Ca writes
Gordons Ornamec 170 Grass Herbicide is not labeled to be applied to dymondia. Killing weeds in dymondia ground cover is very difficult. We recommend either hand pulling the weeds, or spot treating with a glyphosate product like Roundup QuikPro. You can also speak with a Master Gardener at your local Cooperative Extension Office to see what they might recommend.
Answer last updated on: 01/25/2017