Not enough soil, what are my option?!

Hi new to growing and the fourms. Loving both so far!
I have one plant I started probably 3 months ago.(not sure exactly) The strain is nothing special, so called "dirt weed". Off the ground the pot is probably a foot talll and the plant is maybe 2 feet. My problem is that I did not fill the soil to the top of the plant and I'm concerned about not having enough soil.
So my questions are
1) Should I try to transplant into another pot with more soil?
2) Just add soil to top off?
3) Or just leave and let it GroW!
I'm not really worried about volume of bud that the plant produces. Just looking forward to completing the cycle while learning new tricks and information.
Any help would be great.
Thank You,
TEA HEAD

You can transplant but I wouldn't regimens she's flowering already. I would add more soil to the pot something rich in nutrients she looks great by the way. Next time make sure u add more soil to the pot a d I would recommend a bigger pot also they do great in a 15 gallon pot gives u around. 21 to 25the ounces

Do you know the size of the pot in gallons/liters? It looks like a 3gal planter? Before she gets too big id suggest transplanting her to a 5gal bucket or planter fill the medium 1/4 to 1/2 full with soil. Place plant on top of soil and bury the rest of the plant covering about 1 to 2 inches of the main stem and leaving about 1" from top of soil, to rim of planter.

Here's a lil diagram:

Attachment 284192

Hope this helps..