Help with unhappy plant (Celosia?)

newgardeners2020

(Celosia?)  We are complete amateurs. We potted up this plant a couple of weeks ago but it is not doing well at all. Since this photo was taken last week it has got worse. The leaves are discoloured and wilting and the flowers are losing their vibrancy too. We have tried 're potting it, to no avail. The weather has been fine and it has good drainage. Any advice on identifying the problem and rescuing it? Thanks 

Pete.8

I've not grown them for a long time, but as I recall, the flowers are long lasting, but not ever lasting.
Once they start to fade I think they should be removed to encourage new flowers to form. If you leave the fading flowers on the plant it'll put its energy into making seeds and not new plants.
Once the plant sets seed it dies in the autumn (you can save seed and grow your own next year).
That's from long ago (probably 1970's) and maybe new varieties are different.

newgardeners2020

Thanks @Pete.8 . I should have put a new photo on. The plant has deteriorated a lot since then. Most of the leaves have gone brown and wilted and the flowers discolouring too. It doesn't look much like it'll pick up but we're hopeful. Should we just take the flowers off now in an effort to save the plant?

Pete.8

You could post a photo of the plant now and see if anyone can recognize the problem.
If it appears to be dying then removing the faded flowers may give it some new life.
Good luck

newgardeners2020

@Pete.8  thank you. Will do