Failure to flower is most often a result of low light or missing the plants resting period of cool temperatures and limited water.

• Keep a Clivia plant out of direct sunlight to prevent sunburn, and out of an extremely dark area.
• Do not over water during the rest period in winter. Gradually reduce watering in the fall and keep the plant nearly dry during a six to eight week, cool, bud-forming, rest period allowing the plant go dry until the leaves start to droop. This simulates the seasonal dryness of its native habitat. The dry period should coincide with cool conditions sometime in the period of October through January. When returned to household temperatures at the end of two months, gradually increase watering frequency. 
• If not given a cool treatment, flowers may be prematurely produced causing flower stalks not to rise above the foliage; warm temperatures at this time will also shorten flower life. To flower well, Clivia should be placed in a cool area during fall's natural temperature drop, such as in a cool porch or near a cool windowsill that does not freeze. Even a protected spot outdoors before any risk of frost will suit this purpose.  It should experience cool resting-period temperatures (below 50ºF. and above 35ºF.) for six to eight weeks at some point in the period of October through January as a signal to begin setting new flower buds.  The cool period should coincide with dryer conditions. Raise temperature back to about 60ºF. gradually after the cool resting period.
• Protect plants from the stress of extreme temperature shifts that occur if placed too near an in-home cooling or heating system vent. Keep from freezing temperatures near a window during winter.
• When repotting, do not over-pot; an inch or two larger is fine.

Find more information on caring for your clivia in our Guide to Clivia.
- Courtesy of NYBG Plant Information Service