This particular Cane Begonia type have the most grandest version of itself. It is slightly tricky as not to say the most hardy type but not impossible to cultivate. The lavish burgundy foliages has the pink metallic colors with alternative stripes giving that grand display.
Just like most Cane Begonia species - this one is grown on a medium:
50% coco chip mixed with sand & potting mix. I found this medium used for propagation by the nursery owner - I had slightly added the same medium type and re-pot it in a bigger pot.
So far - the plant doubled it's size.
I had used Osmocote fertiliser before and had found them very unreliable and unstable as to determine how much to use - too much and the plant withers away - too less and the plant doesn't grow to it's optimum size. Ideally using 3-4 pieces of Osmocote as fertilizer - 2 week once would be good but in case if it's over used - the begonia plant dies.
On alternative week - I spray root hormone known as (Vitamin B1) a solution for stronger root growth as these are prone for root rot. Again I use in half strength - a capful with half bucket of water.
Slightly spray water once a day in the morning and refrain watering rainy days.
I do water twice a day on a dry and hot days - it's depending on the weather.
Other matters are very much similar with the general information about Cane Begonias.
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Cane Begonia Care & Cultivation information.