What do you mean stop...?

A plant will shoot up from seed and do most of its growing in the first 2-5 days.. Then the growth will (appear to) slow down (nearly stop) for 5-8 days..

during this time period (5-8days) the plant will be focusing its energy on root growth.... this takes place in the dirt.. LOL

On day 14-17 a healthy MJ plant will begin to EXPLODE!!! A new node will appear every 1-2 days...

.. does this help... I HAVE MORE ANSWERS IF YOU NEED THEM.. LOL

and NOW you KNOWM