People have used flowers to create a festive atmosphere since ancient times. You can see flowers in ancient frescoes and find confirmation of flower usage in Roman documents. Already in ancient Rome, special people appeared who grew flowers and supplied them to palaces for decoration. At the same time, widespread was the tradition to shower guests with fresh flower petals.
Although, flowers were still just decoration. The cult of flowers originated in Europe in the XVII century. People began to endow flowers with symbols and senses and give distinct meanings to their combinations.
In the modern world, the 'language of flowers' no longer gets so much attention and importance, and nobody follows strict rules (as almost nobody already remembers them). That has a charm of its own — down with conventions! Just choose the bouquet you like.