When you say "It was a small sprout at the time." From a seed? Or a cutting? If the former, it may never produce fruit. Blossom?? I don't know.

My bad, these will produce true from seed, root cuttings but grafting works better. Sorry for the wrong info.

honestly i have no idea. it came in a box from a souvenir store (not a greenhouse) looked to be a seedling but the box does not say. it had two sprouts at the time and since the seeds are poly embryonic i am fairly confident it was indeed started as a seed. i am just bummed i havent even seen any sign of blooms is six years, let alone a key lime.

Need a little more info. When was your last repot? MG potting soil is not very good and could easily stunt growth. Only a few feet tall is pretty stunted even for a key lime after 6 years. If you've taken the time to care for it this long read Talpa's post called container soils- water and retention. It will give you a nice layout of how to create 2 types of soil which are more effective. If you have more questions about it feel free to ask as I'm sure Mike will be lurking around here and he loves questions lol.

the last and only repot was two summers ago. where do you guys get your fertilizer? i live on the keweenaw peninsula in michigan and citrus plants arent exactly a common thing up here. i walked down to the local hydroponic store today to see if they had a 2-1-1 mix but he didn't. instead he highly recommended 10-5-14 vigorous growth mix and dilute it. directions on the bag say 1tsp/gallon twice weekly. obviously its not going to need even a gallon a week until summer heat hit. also those soil mixtures that talpa talks about have ingredients that arent easily assessable. ive read a even mix of soil to coarse sand is good. would this be "good enough"?

ps the sand available is rather large and free (all of the copper mines used to just crush the rock to get the copper so its almost like fine gravel). i guess that makes a difference. this whole dont use bagged soil is brand new to me.

Well you don't have to use the specific ingredients, there are substitutes that work. An easy way that Mike used to do is to screen MG through a bug screen, then add extra perlite and about 10% of the peat back (Mike if I'm off feel free to correct). You'd want to add a little dolomite lime too 1 tbsp per gallon. I use the gritty mix with MG 15-5-10 all-purpose fertilizer with epsom salt and vinegar added. I've had very good results since I added the gypsum into the mix and epsom salt into the fertilizer (wanted to see what would happen without it, extremely stunted growth). What have you done with it in the winter? Obviously it has survived so I'm just curious.