The name Blossom is a girl's name of English origin meaning "to bloom". Blossom and is often added to lists like Flower Names for Girls and discussed in our forums with posts like "drop your least favourite w randomly generated names - girls with middles".
From the experts:
Now that parents have picked virtually every name in the garden, from the common Rose to the exotic Zinnia, some are reconsidering the old, more generic names like Flora and Posy and Blossom-- which was last in favor in the 1920's and still has a Floradora showgirl aura.
The most well remembered recent representative is the eponymous character in the early nineties sitcom Blossom. Blossom was also one of the Powderpuff Girls and appeared on Dawson's Creek.
A real life namesake is jazz singer Blossom Dearie.