Weed or plant

angel190276

I am new to gardening and downloaded an app to help me identify weeds. However it seems to think this one is a plant but I think it’s a weed. Could anyone help confirm if I need to water it or dig it up please? It the little purple ones in the picture. 

I know the others at the side of it is a lady’s mantle so I’m watering those. 

nutcutlet

the pink one is a willowherb, 

angel190276

Thank you, I will dig it up! 

Rubytoo

You probably won't have to expend that much energy, those small one just pull out.

Fairygirl

Look out for them as perennial plants too - they look a bit different. More like a small rosette of stems with leaves, and they're quite a dark red. [hope that makes sense!] 
Still quite easy to pull up though. 

Alan Clark2 in Liverpool

Even if it wasn't a weed I would get rid of it anyway, as it has no decorative value.

Fairygirl

They are a good food source for several insects, and en masse in 'the wild' with other things like hogweed, they can look impressive, but they have no place in a small, domestic setting and will quickly seed everywhere. A mature plant can produce 100,000 seeds. 

madpenguin

Alan Clark2 in Liverpool said:

Even if it wasn't a weed I would get rid of it anyway, as it has no decorative value.

I thought it looked very pretty 

Mander

I like the look of them so I let them grow when I first saw them and didn't know any better. They get everywhere and you will be pulling them until the end of time. I still let some of them grow for a bit but I try to pull them before they set seed.

Joy*

There is an expression, one year's seed, seven years weed. Unless you want something to multiply freely it's best to keep on top of the weeding, removing them before they flower or at least the moment the flowers fade. I'm always amazed by how fertile weeds are and how they prosper where are cultivated plants struggle.  I suppose that is why we call them weeds!