How does this product differ from the Preen garden weed preventer in the yellow bucket? Will either product harm myoporum parvifolium?

Thank you for your inquiry! Preen Lawn Weed Control is only for your lawn to get rid of actively growing broad-leaf weeds. This product is not meant to be applied around your landscape beds as damage or injury may result. Preen Garden Weed Preventer is the product you are looking for to apply safely in your landscape beds around the label listed flowers,plants, trees, & shrubs. Please read label directions before applying and contact us if you have any further questions @ 1-800-233-1067 Monday through Friday, 8AM-5PM EST. Thank you!