According to the manufacturer, Miracle-Gro Shake n Feed All Purpose Plant Food Plus Weed Preventer 1 should not be used around Crape Myrtles as it could damage them.
Miracle-Gro Shake n Feed All Purpose Plant Food Plus Weed Preventer is not labeled to be applied to dymondia or to any fruit. 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.