i would recommend. some root dip products.
they have some powders you can mix with water
then you can dip these roots in that goopy mess of goodness
before putting them directly in your planting medium

if your using soil, yeah, get some fast as possible
the root system seems vigorous, no prob.
just get it protected with a decent soil medium etc

but use something like these root dip gel/root stimulator etc.
that helps to protect them from drying out to much when they get into the soil
just be careful with em' while moving em
and yeah asap

i have dont stuff like that three times,
not maybe as bad as that, but a sprout is a good sign
plus, people spend lots of money on e-z clone machines
to get big root systems like that

good luck