Q.I Planted Honeysuckle Into A Planter And Have It Growing Up A Trellis I Add A New Plant To The Planter This Year
The planter is 14″ x 14″ and 27″ in height. The previous plants are doing well so I don’t know if adding another honeysuckle with disturb how well the older plants are doing. I do have it growing up the trellis but there is an empty spot as one of the older plants didn’t grow this year

Certified GKH Gardening Expert
It should do fine. Just watch the new plant and make sure it isn't aggressive and tries to take over.
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/honeysuckle-vine-care.htm