Can anyone tell me what the problem is with these delphiniums please?
Hi Poppy girl,
looking at the pics i would say just by what is being shown is that your delphiniums are getting towards the end of their life, how old are they what type of ground are they in,
you could try cutting right back give them a good soak with seaweed extract to give them all the nutrients they need do so every week next year you may find perfect plants.
It looks like mildew, not enough water
OK thank you