Have you ever heard the word Photoperiodism and, if so, do you know what it means? Photoperiodism is the effect of the relative length of daylight exposure upon the growth and flowering (reproduction) ...

CORVALLIS – It’s discouraging when your lettuce bolts or you can’t get your mum to bloom. There’s a reason for that, and it’s all about day length, which determines or how much light the plant gets.

Plants rely on increasing daylight and rising temperatures, processed through internal biological clocks, to determine when ...

Light affects most organisms. In plants, many behaviors and functions are determined by the length of light and dark cycles, including flowering. In the most recent publication of The Proceedings of ...

Lubbock A-J reader Nancy E. of Lubbock saved a poinsettia from last Christmas. It has been growing on her patio all summer and she would like to know how to get the green leaves to rebloom. Before the ...

My dad and I had a running discussion about what makes Thanksgiving and Christmas cacti set blooms in the fall. I maintained that it was because nights were finally longer than days. He claimed it was ...