Planting a caring for wisteria

AHR

good morning 

I have bought a wisteria that is currently in flower. It's about 5ft high and is in a very small pot for the size of the plant. 

there is lots of conflicting information about on how to plant these. 

I really don't know where to start And would like to get this spot on. 

So I am planning on planting this on a south facing feather edge timber building that is just under 7ft high. 

I have found a lot of info that say the stadard stuff - dig a hole twice as deep twice as wide and add lots of well rotted manure. Add wire supports and water well.

Is there anything else I need to be doing and how far away from the building should it be? Does it need planting at a angle or straight? Can I plant it now or wait until it has finished flowering? 

Many thanks in advance for your replys

Dave Hedgehog

You mentioned the building is made from featherboard. Just to help understand the surroundings, what's under the soil i.e. a concrete base, footings, hardcore, sewer pipes etc?

AHR

Dave Hedgehog says:

You mentioned the building is made from featherboard. Just to help understand the surroundings, what's under the soil i.e. a concrete base, footings, hardcore, sewer pipes etc?

See original post

 It's a pergola and I have cladded half to make a room. No foundation as such just heavy concrete slabs and sand/cement. 

AHR

Doghouse Riley says:

Wisterias are a bit like weeds, as long as the soil is in reasonable condition and the plant gets enough water and occasionally a bit of fertiliser, it should survive. They grow pretty quickly, I'd suggest you use lateral wires to support the branches, prune off any laterals not required at any time, I'm doing that all summer.

We've several. This one has been trained along wires attached to the concrete posts at different levels.

I took this photo this morning. It's about twenty years old now.

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 Looks amazing. I would love mine to look as good as yours. How old is it?