Yes. It’s Japanese anemone foliage. .

Thank you, is it likely to get reedy/woody from old growth and the new leaves be quite pale and fuzzy/hairy compared to the older leaves? Mine are heavily slug eaten as well.

It's an herbaceous plant that dies down for the winter and starts over in spring. However the spent flower stems may remain intact into the next year and need to be clipped off near the base for the sake of tidiness.

inherited.. as in you moved the plant to that location ... because it was grandmas???

gotta love houzz just lost the whole post .. crikey ...

or did you just buy the house and found it ...

it might be a camera trick.. but could you even remove it if you wanted ... is it growing in the crack between the wall and deck???

odds are.. either it was a wind blown weed seed or a birds dropped a prefertilized pellet while sitting on the fence ...

i vote weed.. a name doesnt make it valuable .... but thats your decision ...

ken

and btw .. most bird sown rasps are not quality fruit.. unless you basically like chewing on seeds ... they are otherwise know as bramble ...

ken

Not a weed in my book....

And more likely to be creeping in via roots than self sown.

It’s growing in the gaps of both decking ends and I spy a runner root under the boards from the big mother plant to this little one I shared the pic of. There is enough gap to pull it out but not to get all the roots out perhaps. I could try choking it with weed suppression till the roots die off. I got over excited because I wanted to grow blackberries and raspberries in these spots anyway. Leaving it empty is hard because we own very very little garden space in London. Ken we just moved in and it was already growing like this from the previous owners. I am tempted to leave it for now.

OK. You didn’t say you’re in London. Bin the google app. Purple flowered thornless raspberry is unlikely in your location and, although the fruit are edible, it’s grown as an ornamental. You wouldn't get a worthwhile harvest. If you really don’t want a fuss free, beautiful, no maintenance plant that flowers when most flowers are over, chop through the anemone runners with a sharp spade and pull out the plants on your side of the fence. You will need to do this for ever but it’s not impossible. Don’t even contemplate weed fabric. It'll just make matters worse. You can mulch but be careful with wet mulch against the wooden deck. Then if there is sufficient space, buy a proper named variety of blackberry, loganberry or tayberry from a fruit specialist. You’d need at least a foot to access the area for weeding and pruning. You will need horizontal wires on the fence for training to keep the canes under control. Otherwise you’ll have two metre stems waving in your face when you’re on the deck. Or you could put in an espalier fruit tree. But if you plant raspberries there they will behave just as the anemone does ie they will run along and under the deck and pop up all over.

Or just leave the anemones to grow around your newly planted fruit plant. We have so little space over here that we sometimes have to compromise on the counsel of perfection style of gardening.