We have a serious problem in the Pacific Northwest. From other countries they
come in and take over our land. Something extreme has to be done to keep them out.
I am referring of course, to English Ivy, Japanese Morning Glory and Himalayan Blackberry, the
three most invasive exotics I have ever seen in my life. Any one of them can completely
capture almost any site. I've seen the ivy destroy whole forests. And lucky me, I just found
a huge presence of two out of three in my new perennial site. Nothing destroys them. This
ground has been covered with weed cloth for years but today when I was digging I
saw that it is criss-crossed with blackberry rhizomes and Morning Glory roots. I mean, a massive
amount.
The only solution I can see is to physically dig out every inch of soil from the whole
area and sift through to remove all the runners and then surround the area with some kind of
rhizome barrier so they can't re-invade from the surrounding area.
This qualifies as a set back. A major one.