A few interesting points in this article on increased pricing or less supply of points because of increased heating prices:
Casertano will cut back from 60,000 poinsettias to zero this year. "The energy costs being what they are, we felt it was a wise move," John Casertano is quoted as saying.
If supply is down, won't demand be up? Is there another crop, maybe other than roses on Valentine's Day, that is more a must for a holiday?
Articles like this will reinforce in the consumer's mind why prices must be raised.