California Gardening: Sick Wisteria, 1 by DesertPirate

DesertPirate wrote:
I posted this on the Vines and Climbers forum, but thought I would try here as well. Maybe someone will have an idea what may be wrong with my "Patio Tree" Wisteria. Just to be clear, these are the things I know are NOT wrong with it.

1-Too little water (It's in a bed that's watered 3 times a week for 10 minutes
2-Too little sun (It gets 5-6 hours of sun a day)
3-I don't think it gets too MUCH water. It's in the same bed with a Scheffelera (sp?) tree, a Tea Tree, a Plumbago and a Gardenia that are all thriving.
4-Poor soil. I put nicely amended soil in the huge hole I dug for it.

I'm not sure whether it needs acidic soil, in which case that may be the problem. I just don't know for sure. Any help would be greatly appreciated. I paid probably too much for just one plant out of my work plant budget. If this doesn't work out well I may have a difficult time convincing them to spend money on the things I want. (This was my only request for my Spring plant purchase and I spent $60.00 on it)