[Aniko]

After a good soak with fertilizer & superthrtive I would just water a while when needed, until I see the roots growing - not necessarily a new root, but at the tip of the old ones.Than, I would continue the usual pattern of fertilizing, about every other watering. Meantime I would take care of the upper uncovered or partially covered roots spraying them if necessary.
If after about a month no changes can be seen, I would repeat the soaking.

Superthrive I use from time to time, I haven't a strict program for it .
Aniko.