Hello!
Today I’m trying to make a cube grow taller (Not wider) over a certain amount of time using this script, but it doesnt seem to be doing anything…
Anyone think they could help? Thanks! 
var MaxTotal = 3;
var GrowthSpeed : float = 0.5;
if (transform.localScale.x < MaxTotal)
{
transform.localScale += Vector3(0.01,0.01,0.01) * Time.deltaTime * GrowthSpeed;
}
You need to put the growing bit in an Update() function, otherwise it’ll only get called once.
How would one accomplish this? I’ve only just recently started Javascripts 
The short answer is to stick it inside this:
function Update() {
}
But that alone won’t help yo
There’s a bunch of tutes to get you started. Running through them will be far more useful than one-off answers. Start here: Learn game development w/ Unity | Courses & tutorials in game design, VR, AR, & Real-time 3D | Unity Learn