Where are you located?

What size pots are the presumably dead plants in? Are the other plants in same size pots? What kind of 'soil' are they in?

Were they completely dry throughout winter? or excessively wet?

Photos may help.

Thank you so much for responding! I'm in NYC (zone 7), and my balcony is east-facing. The large-ish wisteria is in a large, sturdy, square plastic pot (which I drilled holes into the bottom of for drainage) that I bought from Home Depot, I believe it's 10 inches in diameter at the base and 12 or 14 at the top. It was in a much smaller pot when I bought it at the beginning of last summer. They all have the same soil, a rich-looking organic blend from my local nursery (not MiracleGro), and I added a kelp-based fertilizer a week ago.

They were almost totally dry when I cut them back and put them against my wall...I've had issues with plants rotting when I overwintered them while a little moist, since I don't have much wall space and have to stack them, giving them little to no ability to drain and breathe (plus our winter this year had record lows, so I covered them with some old wool coats for fear that they would die). Do you think the dryness might have killed the wisteria? Are they supposed to be moist while dormant? P.S., the clematis has sprouts now, whew.

I will post photos after work. Thanks again!

similar problem-- I have a clematis on my balcony and am located in New England. The clematis hasn't had any growth yet this year, but in browsing the forums last night people said not to worry until at least May. So I'm not worrying! (haha yeah right, of course I'm worrying)

Oh, good to know, thanks! And I get it, I too will still worry until I see sprouts! This wisteria was my largest and most successful vine, so the fact that it's doing nothing so far, while the smaller ones are sprouting, is disconcerting. I was so excited about seeing big, gorgeous clumps of fragrant flowers.

I would want to know more details about the wisteria, like how large was it before you cut it back and how far did you cut it? Typically, while wisteria is recommended to be pruned regularly, pruning a wisteria is quite a bit different from cutting back the main stalk. This is a very woody vine that in time can develop a seriously sized trunk. Cutting back hard on the primary stem would have set it back......perhaps even to point of killing it.

Also, smaller wisteria plants in bloom are most often grafted, as seed grown wisteria is extremely slow to bloom. If you cut below the graft and the vine survived, it may be some time (like years) before the vine produces blooms again.

Oh my goodness, you're knowledgable! I tried to research how much to cut each plant back, but horticulture is so involved. Hmm...it's hard to say how big it was, since I'm not sure which part I would gauge that by. I know the vines went absolutely nuts, covered my entire balcony. Since I'm not sure where the trunk ended, maybe it's best to mention that it's about an inch in diameter. I really, really, REALLY hope I didn't cut too much off, but I know that I used a pair of cooking scissors (with the crescent-shaped section on the inside of each blade made for cutting round things) to trim the branches, so I wasn't able to get through anything terribly thick, and that decided how far I went. Hopefully the scissors' limitation saved my plant! The trunk is still about a foot tall...I didn't cut it to the ground...with a few trimmed branches that are 2-4 inches each coming out of it. I will still take pictures this evening to clarify the situation. Thank you to everyone for all this help! What a great gardening community.

Ok, here are some pics of the wisteria in question. You'll notice there's tape around one part of the trunk, that's where I bent a branch and accidentally ripped into it (there's the beginning of another gash at the top of the trunk, where another branch starts...I got pretty overzealous with trying to check for green). I don't know if it's smart or incredibly dumb to have the tape there, I figured it might be best to cover it, sort of like a bandaid. If there's anything better I can use to cover that spot, like some sort of paste or glue, please let me know! Oh, and I now know it's not dead, I've spotted a couple of very tiny green sprouts. I would still like to know what to expect in terms of blooms/size, and whether it looks like I've stunted it or not. Thanks again!

Wow. I really can't thank you enough for all this info. I asked the guys who bring these plants to the Union Square market from their nurseries all these questions, and they were not one iota as helpful as you have been...and I paid them substantially for these things!

I will research the hell out of wisterias now. And I have come to terms with the lack of blooms for a while, I have only myself to blame. I try so hard to beautify the front of my building because I live above a hookah bar (joy of joys) named ISIS of all things, and I want to put on a show that says "dangerous people do not live here!" Ha. Thanks again.