Polemonium problems

I planted a few of the these last year, one being Brise D'anjou and they were lovely but I am not sure if I am doing something wrong as the lower leaves always look pale and shrivelled. I have noticed this more when they have been watered so thought that maybe they don't like a lot of water but considering they are supposed to be shade lovers I am confused. Anyone have experience of these please? t i a
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https://www.rhs.org.uk/plants/13380/Polemonium-caeruleum/Details
I only grow the white one now. They do like shade and damp soil, so if you can't reliably give them that, they might struggle. Great for bees and other insects.
They will produce some old tatty leaves low down as they mature. You can just take those off. Is that what you mean?
I live in west central Scotland - not where that photo is...
They prefer well drained but moist soil apart from that not a fussy plant