Can this Sinbad begonia be saved?
This is my third year for it, repotted it in Miracle Gro potting soil late last summer, 5 gal pot. It was so covered with beautiful leaves and the little pink flowers last year, it was amazing, couldn't even see the pot, leaves hung to the ground and also a lot taller.
They won't overwinter outside here, so I brought it into the sunroom, put it back on an east window corner where it wouldn't get too much sun, just where it had done well the previous winter. Got it in before any frost hit (I thought). Immediately it started dropping leaves. I figured it was a goner, but kept watering it all through the winter.
The other day, I asked for help to carry it outside and put it where it was last year. All winter it tried to make new leaves but doesn't do anything.
So I turned it out of the pot to see how rootbound it is. Good rootball but not wound around the bottom. Next I decided to cut it back by about 1/2, made my cuts a bit above an axil? (where the leaves come out of the stem), hated to do it.
It did turn yellow last year before I repotted it, gave it some Miracid, came back beautifully, but not sure what feed they like best. Over the winter, I alternated Miracid with Osmocote but not as often as the instructions say.
I'm not big into begonias because you have to grow them in pots here, and I've had a couple failures with other kinds. Is there anything more I can do about Sinbad other than watch it?