Whats the best way to take care of celosias?and what should i do if they start to die?

Question:i dont know exactly which one it is but its red.i read they need full sun but this phoenix sun is soo harsh im a little afraid to put them completely in the sun but theyre still getting sun and im keeping the soil moist but theyre dying:(and i jus got them.please somebody i need help!these are very important to me i cant lose them.thanks so much to whoever can answer my question.

Answers:
try putting them in partial sun outside,the morning sun is better for plants because it does not get as warm as the afternoon sun,
if they are in a pot try upgrading to a bigger pot so they don't get root bound