citrus do not have dormant periods. thus you should keep on regular schedule of fertilizing year round

@keithdphan Ok Thank you. I was reading not to fertilize it since it's in weaker conditions than it was.

well they dont have true dormancy but hey will slow way down if when you bring them inside. Mine are in the greenhouse and I do back off on ferts. Normally once a week during spring and summer but fall winter I go to once per month.

@mikerno_1micha This what I used. Organic. It does say March-October on their website now. It didn't say that on the bag!
http://drearth.net/products/organic-fertilizers/organic-9-fruit-tree-fertilizer/

I haven't used any since August. The lemon tree grew fine during the summer and did its thing, didn't feel the need to add any/ I would forget about the fertilizer.

I noticed inside right now with its current light conditions the leaves are easy to fall off if you bump into it.

I'll probably just keep it watered and that's it.

John hello..See if you can try to grab the concept of growing trees in a pot?

Your goal is to keep your mix open and porous as much as you can for as long as you can until your next re pot. It also helps to aerate the mix often which allows oxygen to get to the roots more often. In turn you avoid root rot, fungal issues, gnats and a host of other surprises..

If you use 'Organics' in your mixes, not only is it not readily available to the tree, but it will eventually clog your air porous mix and catch you off guard. It will not provide all the important nutrients your tree needs at once but only certain kinds and in the end, you will be caught of guard and your tree will decline in vigor all of a sudden. My goal is to ALWAYS use water soluble fertilizer which provide nutrients right away without the fear of clogging up my mixes, and trust me, 'Organics' with clog up your mixes and will further speed up decomposition of an open mix which can cause compaction...Do you understand where I am coming from?

Those 'Organics' seem to work for a while, and then like a firestorm, always catch people off guard with a host of nutrient problems for 'containerized' trees...

Most here have found out that' Organics' do much better in the ground with reliable microbes to make them available to life in the dirt.

@mikerno_1micha Awesome Thanks for the advice, this is the first thing I'm growing in a pot that's not going in the ground. So the whole thing is new to me.
I've been looking at a lot of stuff on here, and since it's user based everyone has their tips and tricks. What I've done so far, I've learned from here!
Guess it's good I haven't used any of that organic fertilizer since August!

John since this is your first go at winterizing try to stay ahead of what many of us battle with indoors. Look up spider mites and scale, they are going to be your next hurdle and by the time you realize it will be an infestation. Get on a schedule now to wash-wipe or mist your leaves.

@dnedd1 OK thanks. Very helpful. See I didn't know some of this stuff. Guess that's what the forums for :D....I think some people fail to recognize that.

What I've been reading and videos online I don't see any of those signs yet, but I will continue to check. I usually sing to it daily, usually morning and night. I will check then. Also will take preventive measures! Thank you!