When it's March, this Yellow Tree (Tabebuia), Poinciana in May, Golden Shower Tree and Jacaranda in June.  

Oh, Mango trees start blooming soon after the New Year Days. They know which month to bloom.

On the other hand, a kind of Jasmine bush in my front yard has flowers all around the year, it doesn't care seasons.  

Here in Florida, we don't have to worry about when to plant seeds.....not really......not exactly 

How do plants know seasons, or "month" to come out?!