Plant I.D please

[SoS505]

My app thinks it’s mustard but the pictures that come up with that identification don’t look like my plant. What is it? It’s self seeded.

It looks like a weed I often get in my garden. If it later grows a tall stem with milky sap inside and yellow flowers on top, then that’s the one. I think it might be in the hawkbeard family.

I think that’s a cabbage of some sort, perhaps Purple Sprouting. I see where @Babdoc is coming from - Sonchus asper or the other Sonchus but I think the leaves are too thick, and their attachment to the stem is wrong. Try googling “mustard greens” and you’ll see what the app is thinking of - but the leaves are too green, don’t have the blue tinge of yours.

Probably wide of the mark but it reminds me of a poppy that appeared by my compost bin, flowered profusely for one summer then disappeared, never to be seen again.

You’re picking up on the smooth blueish leaves. I think the lobes put it firmly into the cabbage camp. @SoS505 can you try breaking a leaf, does it have milky sap?

thanks for the suggestions.
I initially thought cabbage when the leaves first appeared, then I was thinking rapeseed oil, which has appeared before but I can’t quite match it to a picture, big poppy -pink?- I have seen in other gardens nearby in the past.

Looks like I will just have to wait and see what develops!
I do wish it wasn’t right by the front path though, it will be a bit embarrassing if I’m cultivating a massive weed.

@MereDintofPandiculation still miss that poppy, I see it everywhere!

Definitely looks like a brassica family plant of some sort, rather than an Opium poppy. I have a very similar thing shooting up in my pots, mine has a white, delicate flower. In my case it is from an unspecified something left to go to seed in my veg patch last year, but I am not sure quite what !

Looks like cabbage to me

Ok, I know it’s been a while but I left it growing, although I really wish it wasn’t at the front because it’s so messy.
I started to think it was actually little tender stem broccoli florets that were appearing but now it’s starting to have yellow flowers. Any ideas? Is it actually rapeseed?

There's loads of plants in the cabbage family and, I think, some of them will hybridised. Anyway, definitely not a poppy .

Broccoli florets do develop into yellow flowers if left.

It's a weeeeeeeeed!!!!!

Purple Sprouting. With broccoli, purple sprouting, cauliflower, it’s the flower buds we eat. But you can still eat it when the flowers are opening.

(Feeling smug for having got the right answer a page ago)

Though admittedly it’s basically some random variety of Brassica napus/B. oleracea

I am now tempted to pick it and give it a nibble tomorrow.
I will report back to confirm it’s taste if I do. I will be glad to get it out of the front at any rate. I’ve been quite embarrassed letting it grow whilst waiting to confirm what it is.