A couple of years ago, I decided to plant some lovage seeds and a couple of them took and I got a few small lovage plants. Lovage is an herb with  a celery like smell and flavor used in soups and stews, more popular in Europe than here.

The perennial plant returned and was approximately 10 feet tall with large hollow stems and seedstalks that fell over because of the weight of the seeds. It dominated the whole back of the herb garden. Since it was so invasive and I never used it, celery leaves or seed would work as well, I removed it. It will probably need Roundup to finish the job.

There was also a good amount of buck thorn and nightshade growing along the fence, which will also probably need some spray to kill the roots after I removed the rest.