Hey vizer...
what size light are you using...?
If you are using CFLS or a small HID, you canflower when the plant has 4- nodes (14-20 days old) and you will be fine... you won't need to switchback and forth between veg and flower... just switch to flower and keep going..
MJ plants need very little time in vegging to get good yields under low light situations...
can you post a picture?
cheers