I have 2 geraniums in a pot that has no blossoms and has not had any.

Feed it Flower Power or something similar.

yes, maybe a plant food for flowering plants would help.

They could be rootbound. How long have they been in the pots? Have they ever been fertilized? I would repot into larger vessels with fresh potting soil and water well and make sure they get enough sun.

I have a crepe Myrtle that I dug up in Florida and transplanted in South Carolina. The first year it had new growth and beautiful blooms. I've had it for four years and it hasn't bloomed again. It continues to grow but no blooms. Any ideas?

Geraniums LOVE sun and room for roots and not to be over-watered.

Geraniums do get insects/worms on them....we have found that some eat the centers out of the buds. Usually spray with some insecticide or powder them with a dust when we see it happening. Then takes a couple of weeks for the flowers to grown again.

http://homeguides.sfgate.com/geraniums-wont-bloom-90706.html