weeds as tall as 6"
Thanks for writing. Without being able to see your big, tall weed, I can't say what it is. You can try digging it out with a shovel --- or if it's too big for that, try applying an herbicide such as Roundup. (Roundup is absorbed by the leaves and sent to the roots, eventually killing the plant.) If the weed is growing close to other plants, try applying the herbicide with a paintbrush so you don't get any on your other plants.
As far as the other weeds in your garden go, your best bet is to either pull or spray them, as well. Or, depending on what kind of mulch you used and how much you applied, you could make your mulch layer deeper. You don't want to make your mulch much deeper than 3 inches.
---Justin, Senior Garden Editor, BHG.com
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