Hi Bonnar Bloke,
For my wintergreen and empire zoysia I use Amgrow Bin-Die for broadleaf weeds. This works great on bindii and oxalis, amongst other random broadleaf weeds for me. I have also used Amgrow Kleen Lawn on wintergrass with good success, havenβt tried it on my Zoysia so use Bin-Die for simplicity. I use Amgrow wintergrass killer - this is ok but needs multiple applications. I recently started using a pre-emergent instead, and I suspect within a year or so I will have very few weeds germinating. I reckon I had a quarter of the amount of wintergrass this winter compared to last for example using a pre-emergent. The product I used was Oxafert. I will be using Embargo by Turf Culture this season.
Cheers,
John