We have several well established beds that are infested with Hyacinthoides hispanica (Spanish bluebell). For a variety of reasons I am unable to dig them out or use "petrochemicals" like RoundUp so I'm looking for alternative spot treatments.
I was thinking about using horticultural vinegar as a spot treatment, but am unsure what the best way to apply it is. My first thought was to cut the flower off the stem and fill the stem with vinegar. But then I got to wondering if it needed to translocated to be effective.
I'm also open to other methods if someone has found an effective treatment.