I'm at my wits end with a large bindi problem in the back yard so took the plunge with weed and feed product you apply with the hose that's been around for a long time.
I chose they most expensive brand as it was the only one with potassium and iron as.ingredients for the feeding part. I did an express research on my phone and an article mentioned those as important nutrients.

The photos were taken today just after application.

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Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!