Oregon State University Extension Service

Is it too late to torture my poinsettia?


Unfortunately, the plant already has several strikes against it developing color by the holidays. This is because it should have received bright sunlight while outdoors, also because the plant should have begun its "training" a month ago.

Basically, in order to develop its colorful bracts, poinsettias must alternate long nights of 14 hours and short days of 10 hours for 8 to 10 weeks prior to "bloom."

The required details are described in this publication: "How to rebloom your holiday poinsettia (http://www.canr.msu.edu/news/how_to_rebloom_your_holiday_poinsettia)". 

Source URL: https://extension.oregonstate.edu/gardening/flowers-shrubs-trees/it-too-late-torture-my-poinsettia