Hi; I have a few mini Begonias -- B. partita, B. Peridot, B. Tiger Princess, and B. Nigra-something (label dissolved, I'll look it up).
The Peridot is filling up a 4" pot, the rest in various pots. They look healthy but I've seen no blooms on anything. I use my AV mix, (1 part coconut coir, 1 part perlite, and 1 part vermiculite, with some hort. charcoal for chuckles) and they seem to like it; admittedly I feed them irregularly and probably too weakly. I keep all but the partita under fluorescents with my AVs (on the edges).
I'm confused about my partita; should the leaves be green or red? If they're green, it looks etiolated, and if they're red, they tend to look stressed and die. !!???
Any suggestions to make them happier? How snug in the pots should they be? How and how often should I feed them?
Thanks for any help.