One Christmas Cactus gets sun close to windows facing south from noon and the other C.C. sits away from the window. Both plants look green and healthy; however, both grow tiny buds which eventually drop off. I don't get blossoms. Help.
Certified GKH Gardening Expert
This article may help with that: https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-bud-drop.htm