u/type_n_typebeat

Can someone help me figure out why every leaf burns? I treat my tap water but this is still continuing to happen. Not really sure what else to try. I brought them inside to try to control things a little more they barely had if any direct sunlight outside.

EDIT: adding this information to curve the humidity comments. Ive got 20 or so begonia and all my rex are in a pretty airy mix that gets dry every 3-5 days and I top water once the top inch or so gets dry. We've had a heatwave recently where Im at and id say upper 90s if not 100 plus some days but extremely high humidity. Even indoors where I keep any of them its 60% humidity. I use tap water treatment to dechlorinate my tap water. This one in particular along with 10 or so other are on a west NW facing balcony that get some direct sunlight though tree branches for an hour or so through the afternoon but are mostly in shade.

I’m having trouble figuring out if the yellowing spots on my baby are coming from the soil being too wet consistently from a self watering pot or if this is fungus and I need to be treating the plant. Any and all advice and help is so very greatly appreciated. I’ve had her since a 2inch plant and this after 10ish months. I keep a very bright grow light on her for 12 hours a day. I was considering that humidity might be an issue but I’m afraid to put it outside with a spot with full sun.

She putting off pups that seems to be growing quickly which I’d imagine will be an issue if I don’t get them out before too long.

Can anyone help me ID this cane begonia? Very thick rubbery leaves with metallic silver dots. The mature leaves get a very dark shade of green. Very deep red backsides. (Please disregard the sulfur as we’re still treating for powder mildew)