Rotted Compost: Use In Containers?

[Ouya Mellsa]

I have 3 compost bins at the allotment. One has been well rotted and covered for 3 years. It is good quality stuff.

Is this stuff ok for putting in large containers to grow plants in? i.e. I want to put a weeping willow into a large 50l pot. Would the tree grow well enough in this garden compost, provided I add some fertiliser? Or should I just buy a MP compost?

I obviously wouldn't use the garden compost for seed sowing or cuttings.

[Two_Sheds]

Don't grow anything permanent in mpc, it's too light and fluffy. John Innes mix No.3 is the kind of thing you need

[Ouya Mellsa]

I've found that MPC is a good growing medium for my permanent pots, TS.

I was thinking of using the compost bin, err, compost because money is tight.....good quality compost (John Innes) is too much of a luxury.