Nasturtium leaves yellowing
I have grown nasturtium in a container and the leave are yellowing and look anaemic. I have some growing in the ground and they are very lush and green. I used two thirds old compost in the container as I read too much nutrients reduces the flowering of the plants however I am wondering if perhaps they are deficient in nutrients. I never water the container now as again I read this causes lots of foliage and no flowers however we have had a lot of rain lately. Should I feed them and what with?