I bought this plant about a year ago at Marsh when it went out of business & it was labeled “Tropical plant #3”. I have spent hours on the internet to identify it & even contacted a local greenhouse but no luck. When I bought the plant it was about 8 inches tall and now it’s about 24 inches. It grows rapidly year round. During the warm months I move it outside because it seems to do better with bright/humid atmosphere. Now it sits on our North facing balcony and gets 3 hours of direct light (thank god im moving to a house with East and West facing windows!!). About 2-3 weeks ago it started to develop what appears to be berries? But they are only growing on one “stalk” ... I recently redid the soil because it was very packed down and the root system is composed of many small roots and zero large anchoring ones. They were also very shallow in the pot considering the plants size. The new leaves start red and turn a very deep green. I just want to know the best environment. 
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When you say "berries", do you mean those bundles of little white pointy things? They look a little like buds to me, at least in the photo. In fact the whole plant looks a little like Star Jasmine, aka Trachelospermum jasminoides, although I didn't know that one as a "houseplant". Was this fellow sold as "tropical plant #3"? or "tropical houseplant #3"? Sounds like it has been letting you know of its love for the great outdoors. Is it possible that it isn't a houseplant at all, and that is why you are having trouble identifying it? ...Have you looked into Star Jasmine at all?– Lorel C.Jun 26, 2018 at 4:20
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@LorelC. Its not Star Jasmine (Trachelospermum jasminoides), the leaves aren't right. The leaves look very like Ficus benjamina, but those flower buds rule that out... I'm wondering about Ardisia, maybe Ardisia guianensis toptropicals.com/catalog/uid/Ardisia_sp.htm– BambooJun 26, 2018 at 18:31
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@Bamboo Are you sure those are flowers? Could these be some kind of olive tree?– RobJul 31, 2018 at 21:12
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Let those bloom (if they are in-fact flowers) and it will be easy to tell what plant this is. As it stands, I can narrow it down to about... 20 or so different plants lol– RobJul 31, 2018 at 21:25
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@Rob - yep, I'm sure - berries don't appear out of nowhere, and the OP describes these appearing when there was nothing before. I still think its Ardisia, maybe A. elliptica - its flowerbuds look exactly like these. But if the OP doesn't respond in regard to the flowers opening, well... gonna post an answer anyway though– BambooJul 31, 2018 at 22:08
3 Answers
I think this is an Ardisia, which is classed as a tropical plant, and these 'berries' are in fact flowerbuds, which turn to red/black berries later on. Most likely Ardisia elliptica, images here https://keyserver.lucidcentral.org/weeds/data/media/Html/ardisia_elliptica.htm but could be a different variety.
This variety is unusual as a houseplant, Ardisia crenata is much more common, and I can't find any information in regard to keeping this particular one as an indoor plant, but probably it responds to similar conditions as advised in this link https://www.engledow.com/green-scene/2015/09/ardisia-plant-care-instructions-national-indoor-plant-week-2015/. Yours actually looks pretty healthy, so whatever you're doing already seems to work well.
My guess would be rubber tree plant but the leaves are similar to magnolia tree which is grown as a houseplant sometimes.
Leaves look like Ixora. Perhaps I. odorata
