I have grown bergonias from corms planted out now in various baskets and boxes they now look very strong with lots of leaves but not a flower in sight they are illumination orange I am new to gardening and bought the corms from mirror website don't know if I bought from correct place or whether that's relevant they seemed to struggle when first in greenhouse took a long time to grow may be cold weather earlier in year but as great as they look now no flowers can any one help or may be I need more patience. Dave Marsh.
Certified GKH Gardening Expert
Make sure you are not over fertilizing. Too much nitrogen will inhibit flowering.
This link will refresh you on the care requirements.