By Alextb
London,
England 
Last year my yellow rose bush produced beuatiful yellow roses. This year the bush has produced more flowers, but they are 3 times smaller and white with a slight tint of yellow.
Why has the bush done this and can it be rectified? Or do I need to get a new one?
25 Jun, 2012
Answers
Thank you Hywel. I have fed it, and fingers crossed this works.
26 Jun, 2012
Also, double check to make sure that it isn't a sucker that has come up from below the graft. Yellow roses need sun to produce full color, but even if the weather has been too gray, the flowers should still have been full sized--maybe even plus sized!
27 Jun, 2012
Would cutting it back a bit improve it?
27 Jun, 2012
I wouldn't do more than the usual deadheading.
29 Jun, 2012
O.K. Thanks.
1 Jul, 2012
Previous question
It sounds like maybe the rose needs a feed. You could try one of the rose fertilisers from any garden centre. I don't know if that's the case, but in my experience when something is smaller than it should be, it's lack of food.
26 Jun, 2012