How to keep/store tuberous begonias
I brought 3 tuberous begonia plants inside right before a frost 2 weeks ago. All were blooming heavily. Now they are all dropping leaves. The leaves turn pale, dry up and drop off. But there are still plenty of flowers.
I know IÂm supposed to store the tubers until spring but I donÂt know when to dig them up. I grew some last year and they started declining as soon as they were inside, ending with the stems dropping off or rotting at ground level. When I went to dig up the tubers they had rotted. ItÂs looking like these are going the same route. Do I withhold watering at some point? When, when they are still blooming?