No problem :-) Periwinkle, Vinca minor, is only considered invasive if it is allowed to migrate outside of a cultivated setting into natural, wooded areas. It is extremely controllable in a garden situation.

Vinca became very invasive in our yards, and it became a landscaping nightmare for us. Everything was beautiful, so long as we were able to keep up with the landscaping responsibilities. When we inherited the landscape from the previous owners, the vinca was rather young and hadn't been there too terribly long. Over the next few years, it became thick and still looked great, but it was increasingly difficult to get to from creeping up the trees. We have it in many places in our yard. We'd tear it out of the trees, and cut it at the base, but it continued to be very difficult to keep it from creeping back up and is a lot of work keeping it where we want it. Well, I became ill and wasn't able to do much yard work and it crept up many trees. It will branch out of the tree trunk and become an ugly small invasive tree growing out of the side of the tree in just a year or two if it is not kept in check. I certainly never planned to become ill, and this plant took over the yard in my absence. It is a burden, at the very least, to remove it now as I am becoming older and not as vigorous now myself. It requires my friends to bring their Bobcats over to pry the vines out of the ground and digging it up is a major chore. We have to have it removed totally before it kills all of our trees.

I have never heard of Vinca climbing trees or harming them. English ivy sure does that though and it's foliage changes form into a shrub.