This question deals with the magic explained in this question. It is also explained below.
In my fantasy novel, magic is a natural part of the world. It is not some mystical force shrouded in mystery, but rather backed by science (though only I, the author, know all of it's workings).
In my world, magic is a force that by its nature changes living cells. It is similar to radiation, but different in the respect that it changes what the cell does, usually in a beneficial way. For example, if the cells of an eye were exposed to magic, the magic might make the eye also see infrared light.
There are those in my world who can control the change worked by the magic. (They can force the magic to make the eye see infrared light. They can also use magic to make that same eye go blind.)
Using this magic, I'm wondering if it is possible to accelerate the growth of a plant. Can the cells of a plant (a tree for instance) be altered in such a way that a seedling could reach maturity in a matter of weeks? Days? Hours? Minutes even?
Remember that 'changing the cells' doesn't mean they now magically do what I want. The cells can only be altered, so that they produce different chemicals or perhaps react differently. The cells cannot be controlled or anything.
Note: Assume that the plant has access to unlimited amounts of energy as a byproduct of the magic.