The Tropical Fruit Forum

It looks like zinc deficiency.

Garcinias can take acid pretty well. The mix I normally use is largely peat, some perlite, topsoil, and some sand and maybe compost. I think the soil is ok. you could always try to redo it, but I'd just hit with some fertilizer and wait till spring. No need to stress out the plant now.

Realistically it could be sooo many things, but here's how to diagnose:
slurry your soil and pH it. Use water that you'd normally give your plants to get the most accurate reading.

Reference this chart here https://www.researchgate.net/figure/The-effect-of-soil-pH-on-nutrient-availability_fig2_277669269 and report back. Note that anything under 5 drops off drastically

I'm guessing your soil is just too acidic because peat moss has a pH of 3.5 and pine bark 4.5, but maybe the perlite is enough to swing the pH back up. I'm not sure, just my gut reaction. I'm thinking that since osmocote is supplying nutrients but your plant isn't receiving them, it's experiencing lockout

Container looks too big and soil looks too wet.
What soil are you using?

Quote from: tru on November 15, 2022, 05:38:57 PM

they have cuban mangosteen (garcinia aristata) on tradewinds! best of luck on your search, maybe snag me a few if you run into some rare species 

My seeds g. aristata seeds had pretty good germination from Trade Winds

I use this basic citrus spray https://www.amazon.com/Southern-Ag-01902-Citrus-Nutritional/dp/B00A51Y8ZM/ref=asc_df_B00A51Y8ZM/?tag=hyprod-20&linkCode=df0&hvadid=193139379506&hvpos=&hvnetw=g&hvrand=10080865088591328402&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9026839&hvtargid=pla-310724743333&psc=1

dilute it 1/2 what the bottle says, and DRENCH the leaves within the first 5 minutes of official sunset. Plants in general have a transitory period of 15-20 minutes, starting at sunset, that heightens the usefulness of foliar spraying. I use it every 3 months, the bottle says apply every 6 months I believe. Figure more ready supply of nutrients and less chance of leaf burn. Many acidic fruits have similar needs, this has worked amazing for me so far.