Soni
Tough call, last year I kept everything green all winter, leaves looked great in early spring, but towards mid summer I got hit with what seemed to be a lot of rust, I don't know if it was a result of tired leaves, or over watering, too much shade, or what but I thought it was excessive rust.  All recovered.  As to fertilizer, I fertilized just like I did in Florida when there was no dormant period.  Last winter I kept all my plants under light and 72-76 deg, 24/7, I think it added almost a whole growing season.  I have not decided if I am going to do that this winter, primarily to see the difference in the rust.

Let us know what you decide.

is it possible for small plants to go dormant and make it through the winter inside or is it more likely that they won't survive?

Soni, I have one fig about a foot tall in a one gallon pot that I have also been wondering what to do with.  I think I will go ahead and allow it to go dormant and store it in my detached garage.  I'll surround the pot with potting soil inside of larger pot to act as a buffer against temperature changes.  If we get a really cold snap I'll put it in the crawlspace under a part of our house that stays around 40-50 degrees. I decided I would rather do this than deal with gnats indoors and with possible detrimental effects of not letting it go dormant.

Last year here in Connecticut  Zone 6B  I put all the cuttings that I started that year which were in 1 gallon pots in a lean to shed off the side of my garage no heat whatsoever and I didn't lose one "about 40 trees"  this is the same shed that I keep all my big trees in I believe that I only watered them 3 or 4 times during the winter 

Soni,
Thank you for starting this thread. I too have been wondering the best way to get them through the winter. I know our winter is much warmer than most but I am assuming if I acclimatize and get cold, so too will the trees. I would love to find out I'm wrong.
I am particularly worried about the Black Madiera's. I've heard they don't winter well.

Good information, thanks for sharing.

Best,
Tam

Soni Soni, I have over wintered all my trees in an unheated detached garage. Some of the trees were new starts in 3" inch pots and all survived. Maybe it was luck or the Fig Gods were watching over but they all survived. Since you're in a warmer climate than me I would think you should have no problem.
Whatever you decide to do I hope you have the best of luck~!

I also have a question.  I have several smaller, young trees that are still showing new green growth.  Are they safe to leave in an unattached, unheated garage; in an unheated greenhouse; or should I bring them in the house for the winter?  Our winters vary.  Last year I think we only had 2 or 3 days in the 20's.  

Thank you all for the advice and input.
  
  Dave 6B and Tonycm 6A didnt loose their 1 gal trees by keeping them with their 5 Gal plants, soooo... I'm going to stick my 1 gallons into the detached garage with the bigger plants. I'd love to keep them awake for extra growth this winter, but it would seem beneficial to get them dormant to get rid of those rusted leaves.  If we get into a really freak cold spell I could borrow a painter's heater for the garage.
 
  Thanks,  Soni

You may want to just pull off any rust-y leaves and stop the rust in its tracks. Fresh, clean leaves will grow back. I will keep 1-gal figs in unheated garage in the cold, but just in case, during really bitter cold snaps you can just pull them inside, a few days here and there will not cause them to break dormancy.

I searched to find this photo and this is where I kept them last year it's a unheated shed attached to my garage and like I said I did not loose one tree hope this helps

I have a shed almost exactly like that. I'm going to put them in there and hope for the best.
Thank you for the picture Dave.