A 10-year-old, 5-foot tall tropical corpse plant in Brooklyn flowered for the first time last week, emitting its powerful stench for three days.

Luckily for Dutch tulip farmers, garden club members, and floral enthusiasts, many flowers in temperate regions of the world bloom each spring—and smell much sweeter.

Flowering plants evolved about 100 million years ago. As the planet's climate changed, some plants developed a seasonal strategy to lay low through the winter and bloom in the spring. These plants won't flower until they sense winter has come and gone, a process called vernalization.

http://www.livescience.com/othernews/06082...wers_bloom.html

Also there is supposedly a hormone that triggers flowering in plants, but it has yet to be seperated...

Would be interesting idea as not all flowers bloom in the same season or even year.

Take the plant above at every few years as apposed to roses that flower frequently over a period of time.

Wonder the use and importance to science should they identify the triggers if any.

Its easy,they know in the same way as we,they see in the calendar lol

The name of that hormone is florinogen.