Growing begonia tubers
Every year I try to grow the gorgeous double begonia tubers that they sell in those little cardboard bins at the garden center. The pictures looks so pretty. So I plant them in bowls and pots with good potting soil But I always have the same two problems
#1. There are always a few of them that simply don't sprout. Just sit there in the ground. Still firm and fresh to the touch, but no leaves.
#2. Should some manage to grow and get tall, they seem to get sort of rotten where the stem meets the tuber, and either break off or die. Usually when they're looking the prettiest, of course. Very frustrating.
I'll appreciate any advice anyone can give.