Hi All ATV,
Hope Grandma's trumpet vine - campsis radicans hasn't leafed out yet. You might want to read this first.
When I moved into this house 18 years ago as a renter, I inherited a trumpet vine - campsis radicans. I have learned that it was the last plant to leaf out in the spring and the first to lose it's leaves in the fall. Here's my horror story and what I've learned about this vine. Over time the vine began to bloom and pop up everywhere in the yard. I would pull the sprouts only to find more year after year. When it pops up in the lawn it can just be mowed. After 13 years we purchased the house and had to cut down 5 trees and regrade the land due to overplanting and flooding. When we dug up the stumps from the trees and regraded we discovered roots of the vine 3' to 4' deep in the soil, up to 30' from the parent plant and as large around as my wrist! We dug and dug and, well you get the point. A year later we still had sprouts coming up from bits of roots that we'd missed.
Here is how I've learned you can get rid of it. Now, up until this point I had NEVER used herbicides or pesticides in the garden. Here's what I did and you can do to get rid of it. Put about an inch of Round Up Weed and Grass Killer Super Concentrate (you could also use Brush B Gone) in a clear plastic container with a tight fitting lid like you might get at the deli with potato salad. Cut a slit in the lid and insert the tips of the vine in the solution when in active growth (has leaves on it and the leaves need to be in the solution). Leave the vines in the solution for 48 hours and then cut the vines near the lid. To remove the vine from the lid, be sure and take the container to a safe place so that no solution splashes on anything precious. You can reuse the solution until it is all absorbed. Everytime I find a new sprout I do this same procedure. So far there have been no sprouts from areas that were treated this way.
Still want to grow this? How about a nice native honeysuckle that won't take over the world, semi-evergreen in my zone 7 garden, blooms from May to hard frost, pretty flowers with hummingbirds for summer entertainment, berries in the fall and winter with more birds for entertainment and it's a dream to look at.
Lonicera sempervirens 'Blanche Sandman'