It can surprise you. We bought this white wisteria on 15/04/2018. It wasn't cheap at £50. It wasn't showing any life, I took this photo on the day we bought it. It was to replace the one that grew from the right-hand corner of this narrow bed, most of which had died apart from the branch that grows over the pergola on the back of the house. The only thing going for it was that it would get the sun for most of the day. It was over a month before we saw just the slightest evidence, that it wasn't dead. But it's been fed and well watered, responded to training and has repaid us.