Lady. Diana clematis is dying,

My Lady Diana clematis is dying, full of flower buds, looked very healthy until 3 days ago. It is 3 years old and has flowers well other years. I fed her with clematis feed in the spring, watered regularly, where have I gone wrong?


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It's quite immature looking for a plant that's been planted for three years.
How/where is it growing? Is it in a pot?
I live in west central Scotland - not where that photo is...
I'm assuming it's also Princess Diana that you have. It should be pruned right back at the end of winter/early spring so that new shoots come through.
You need to extend the supports for it so that you get better coverage.
Here's a link to Taylor's site for info
https://www.taylorsclematis.co.uk/clematis-princess-diana.html
I live in west central Scotland - not where that photo is...
As @Fairygirl says, your Princess Diana should be pruned back hard every March and then fed and she will then put on 2 to 4 metres of growth each year and there should be more stems each year as she matures.
I would start by giving yours a bucketful of water, poured slowly so it sinks in, and a feed and then at least 5 litres a day until she picks up and whenever there's a dry spell. This will help her get her roots better established. I would also try and give her more support so you can twine new stems more horizontally or diagonally as this will increase flowering.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
I live in west central Scotland - not where that photo is...
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw