Celosia's are generally annual plants (live one year only) so in future I would never buy a plant unless you need to fill a spot in an emergency. They go over very quickly after their flowers fade. I think they are a complete con myself. Grow them from seed in future which is quite easy.

If well fed and deadheaded, they will bloom again, but the ones you see in the flower shop never look the same again. I consider them the same as a bouquet of cut flowers--enjoy for a couple of weeks, then toss.