Answer: While the lawn fertilizer might be okay for your jasmine and mondo grass, I wouldn't use a weed and feed on either of them. Weed and feed products kill broadleaf weeds and it won't know whether your jasmine is a broadleaf weed or a broadleaf groundcover. Mondo grass might be damaged, as well. I'd use a pre emergent herbicide instead. Preen is registered for use in ornamentals, but there are other brands, as well. You'll need to remove any existing weeds before applying a pre emergence product.
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