Roots killer will do what it suggests but the stump and roots will remain in the soil. They will rot away eventually but it'll take many years for them to degrade completely.
Personally, I'd buy a cheap trench shovel and use it to chop the thickest roots around the base of the stump and deep taproots under it and pry the stump out. Use a garden fork to lift out to side roots. It's incredibly unlikely the berberis (or most trees/shrubs that don't send out creeping rhizomes) will make a comeback.
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Roots killer will do what it suggests but the stump and roots will remain in the soil. They will rot away eventually but it'll take many years for them to degrade completely.
Personally, I'd buy a cheap trench shovel and use it to chop the thickest roots around the base of the stump and deep taproots under it and pry the stump out. Use a garden fork to lift out to side roots. It's incredibly unlikely the berberis (or most trees/shrubs that don't send out creeping rhizomes) will make a comeback.
Thanks Dave . I will do that!
Exactly what i stated