Afternoon all

I brought a small rhubarb plant from Wilkos and it has produced two
stalks/leaves. One of the leaves started to yellow and the stem started to
go soft. I have checked it this afternoon and the leave is now totally
yellow... I have removed the offending stalk and am now just left with the
one pitiful stalk... Any suggests on what happened and any tips on growing
rhubarb?

Many thanks
Donna