question on potted wisteria on balcony
I have Wisteria in a in large pot, on my 4th floor balcony which faces West and has no obstruction near the balcony (so it can get very windy). I only learned recently that being on an elevated balcony creates a different environment for plants, versus say the same potted plants sitting on the ground.
In any case, here in the Northeast we had a cold winter and lots of snow. So I'm not sure how much this affected my plants.
Last year the wisteria did well. The Wisteria grew like a weed.
This year is different. The Wisteria essentially appeared 'dead' (and mind you, I did follow pruning directions throughout the year) but then just a few weeks ago a 'sucker' of sorts appeared from inside the pot...where the branches all tend to coil up. The stems emerging from the pot (from last year) have zero new growth, but the sucker from within the pot is already taking off. Will this sucker become a new plant so to speak? Should I totally cut down the other 'dead' stems from last year and which have no growth?
So, what do you suggest I do to help my Wisteria thrive again?
P.S. I've learned that even though these plants are hardy for my zone, that the fact that they are on a balcony means they need protection during the winter. So I will protect them better next winter with burlap, bubble wrap, leaves etc.