Yikes, I'd get it into a proper mix pronto!
Compost/manure/garden soil...none of that works for very long in a container -
it readily compacts and impedes drainage. Without question, that type of mix
will need to be replaced within a season, or else the tree will lose growth potential
and ultimately begin its slow decline.

When it comes to root-health, you must build aeration into your mix - that means durable, stable
ingredients with a fairly uniform particle size. Pine/Fir bark is a favored ingredient because it
is a relatively economical and durable "filler" that helps balance moisture retention between the
peat, perlite, or porous grit such as pumice, scoria, or turface.

5-1-1 is an exceptional soil, and requires LESS watering the larger the container is.
It is a common misconception that 5-1-1 needs to be constantly watered. And if you
happen to live in a terribly hot, dry location, simply tinker with the ratios to arrive
at the moisture retention and drying-interval you desire. For example, a 5-2-1 of bark:peat:perlite.

Josh