Pahiopendelum blooms
 

I have a pahiopendelum that bloomed but the flower was very small when it grew. What could be the problem?

Do you know what species/hybrid it is?

Pahiopendilum petula in pink

How big is/was the flower? Has it previously bloomed with a larger flower?
Young plants may have smaller flowers than more mature plants. Less than ideal cultural conditions may also cause flowers to be smaller.

You know, small, big does not really say anything at all. You have to give measurement.

How about some pictures of the entire plant to see how small it really is?
That will make everything clear and easy.