Question
Do you know where I can find the plants wich are using short days and longdays? Some plants only flowering when the daylenght become shorter, but where can I find wich plants needs long days, and wich needs short days?

Answer
Hi Abraham,
Thanx for your question.  Because I don't know where you live I'm not sure why you're asking the question.  HOwever, someone at a nursery or garden center near where you live should be able to answer your question.  We do not grow plants around here according to day length.  I know we grow onions that way.  Ihope this helps.
Tom