In nature, poinsettias bloom in early march. Research has shown that the following process is triggered three months before blooming occurs. In order to make poinsettias bloom in December, florists change the length of the light-dark cycle in September. Given the information and clues above, which of the following is a FALSE statement about poinsettias?
1. they are short-day plants
2. they require a light period shorter than some set maximum
3. they require a longer dark period than is available in September
4. The dark period can be interrupted without affecting flowering.
5. They will flower even if there are brief periods of dark during the daytime.