Hey so i have a ficus that i brought inside after summer ended, it was fine, then it slowly started dropping leaves turning yellow then falling. The branchs even without leaves are fine. Green tips. Been that way sense september. Any ideas?

Also i have a ficus squamosa thats been doing the same but all bottom leaves are fine top leaves have green veins yellow inbetween. Patchs of brown and brown tips. This is not the same as the microcarpa, those leaves are just turning flat yellow.

Is it your first years with the trees?

Leaves do not last forever. All trees shed leaf to replace them. In my climate and conditions ficus drops quite a lot of leafs in winter. I think the low humidity and low light has something to do with it. But they always grow back come spring.

No. 6th. My name syconisperm is part of my research project to prove the syconium of ficus are indicators of early splitting from angiosperms or a sister clade. I have 63 species of ficus. 5 species of dorstenia. 7 podocarps. I have a huon pine and a strawperry pine. Adenium. Snow bush. Ect ect ect ect. Anyways thats my resume. My problem is i agree in your observation of dormancy in microcarpa. I have like 10 of them. Only this big one is behaving this way. Although others have started. So you would then suggest its dormancy? 

Second my ficus austrocaledonicas leaves are not turning yellow just the leaf tips are browning back to the stem and branchs are dying from the top down. 

So basically microcarpas are just trying to be dormant, and the austeocaledonica would be....root rot?   I took it out of its planting medium and into a temperary holding terrarium while im at work. Ill put it in some lava sand when i get back after cleaning....but would you think thats root rot? I think so but i wanted a second opinion.

Also have you used wigerts bonsai soil before? I think its ackadama varient is turning to muck

My ficus never drop leaves when brought inside. I would say it is not normal, nor needed.

What COULD be happening is that you bring it in, and keep it a lot drier than it was outside. That might trigger a protection reflex of the ficus; It is a species that occurs in (sub)tropical regions which in part have distinct wet and dry seasons; To survive dry spells they drop their leaves. Ensuring sufficient water may be the key.

Water / light / temperature need to be in balance with ficus. So if kept over winter in a cooler room, reduce water. If kept in warm tropical conditions, ensure sufficient water (and often additional light).

I have a whole grow room set up with 200 watt viperspectrum full spectrum leds and some chinese 200 watt blue / reds. I also got a vivosun 5 quart timed and hydrometer sensing humidfier. It helped but the roots still where collapsing. I finally put it in my terrarium and its acting like nothing is wrong displaying typical ficus john carpentors the thing style growth. Its breaking new buds and die back has ceased. I think with this particular species once it gets into the low 60s there is some immune problems. They tend to love being soaking wett now its like the smallest amount of water causes rot. Even at 80 % humidity. Though once i added the humidifier it was showing leaf tip death i just didnt recognise the problems severity. I dont think it can survive without already being well established (it was freshly pruned) and cold/dry. My terrariums in the 80s now its just rebounding noticavly each day. I think if i had caught it earlier and just didnt water it much the cold wouldnt have been an issue. Your right i just thi k the cold was the final straw. Its doing well now though. Thank god. Its so beautiful. Like green long leaves like more blunt saber leaves of lime green with a ebony and marroon trunk, virticle stryations and small hairs with the typical segmentation. The branchs but back like a dream. You hardly need to trim it. It creates side branchs inchs from the buds rupture point by itself. Like a more compact F. squamosa. 

Just god a habrophylla, two phenotypes although i believe the second type might be a unidentified ficus by the collecter. They came with a large webbiana and frasurii as well as a ity bity frassurii. The frassurii is the most exciting they bid back like a madman. The most insane back budding of all my collection but with long saber like oak shaped leaves. Similiar to a cross of squsmosa and montana. I cant wait to bsrter with then they should make good trades.