This was bought as a hollyhock.

EllanVannin

It's very much like a plant called bears breeches. Wait and see what the flower's like.

no its not that

Glad you've solved the problem. It looks rather good.

That’s great shysal I’m glad we got there in the end! I just wish I could grow it in my garden.

UPDATE. Thanks to Shrub I have identified the plant as Valerian Pyrenaica. This on line picture of the leaf stalk clinched it. Apologies to those who also suggested Valerian, it doesn't match the usual varieties. I have enjoyed the plant, which is now spreading fluffy seeds, so may have more next year. Many thanks for all the suggestions.
www.bethchatto.co.uk/conditions/plants-for-general-conditions/valeriana-pyrenaica.htm

The machines are taking over - and so are the plants apparently. Quick thought, does anyone know what a young triffid looks like?

Typo or autocorrect, Pippa!

Butterbur - not butternut shysal although that could just have been a typo.

Flowers look like Valeriana officinalis, but the leaves are different. Do please update us, I am intrigued.

Nope. Flowers are wrong for butternut, and leaves wrong for eupatorium which flowers in late summer.

One thing's for sure - it's not a hollyhock!

Could it be a Butterbur?

Pictures here

T looks like a type of Eupatorium, known as Joe Pie Weed. Most varieties are tall, but there is a little Joe.
Not a weed in the Uk, but known as one in the USA.

https://www.gransnet.com/uploads/talk/202105/medium-426952-p1010818.jpg https://www.gransnet.com/uploads/talk/202105/medium-169528-p1010819.jpg

I still haven't identified this plant. It has grown taller, but the other two with the same leaves have no flower heads.

following

Shysal any more news on this plant?

Definitely not Bear's Breeches - I have that in two slightly different varieties and the flowers come on a tall stem not close to the base

Catnip and Valerian are two different plants. Catnip has purple flowers and Valerian has pink flowers. Cats like them both.

The leaf stalks are now red with a single groove down them containing a light stripe! Leaves about the size of a saucer.
Going to look up Angelica which has a square stem I think.

That isn't valerian - I can provide anyone who wants some with valerian we have tone.

It's Valerian - otherwise known as Catnip!

ukcarolm my latest search found mustard plant to be similar but the flowers seem to always be white or yellow and mine is lilac.

Lewie, many thanks for the offer but I have bought enough. I know most of them won't come again next year despite allowing to dry and spreading the seeds.

shysal
We're all agog!
I hope the flowers come out soon and we can make a decision

It looks a bit like Mint that has gone to flower

my app says Garlic mustard.

Shysal Thank you for the link to the Flymo. Mine arrived today.