We have some cala lilies (indoor potted)that flowered very well three years ago since then good foliage but no flowers. After first failure I re potted in fresh soil/compost but only one fairly miserable flower appeared. Your help/advice would be most welcome.
Certified GKH Gardening Expert
There are very many reasons why this can happen. This article will help you to pinpoint what is causing this problem:
Here are more articles to help: https://www.gardeningknowhow.com/search/?q=calla%20lily%20won%27t%20flower