Please help to identify - uninvited visitors in a large planter

Big Blue Sky

This plant grew uninvited in a pot with miniature Weigela - is it a weed? (I checked first thing to make sure it’s not JKW 😳)





It is quite tall and I think is about to flower. 

That planting pot seems to be attracting visitors, these two plants are growing there too:







Will pull them out eventually but would like to see how they are developing first. Would really appreciate your help with the identification. Thank you 😊

Paul B3

1) Chenopodium spp.

2) Lamium spp.(?)

3 )No idea

Big Blue Sky

Paul B3 said:

1) Chenopodium spp.

2) Lamium spp.(?)

3 )No idea

Oh, thank you @Paul B3 that really helps.
I googled both plants and they do match the ones that are growing. Luckily they don’t seem to be invasive or otherwise dangerous, so I will keep them until  they flower - for the bees and to see what they look like. One could even be quinoa 😲
The third one too seems to be some kind of a grain, so I wonder if a bird pooped into this pot and planted grains from bird food seed mix 🤔

josusa47

The third one too seems to be some kind of a grain, so I wonder if a bird pooped into this pot and planted grains from bird food seed mix 🤔

My thought exactly.

fidgetbones

Last one looks like wheat out of bird seed. I often have some pop up around the feeders. 

PeggyTX

3rd photo is definitely Lamium, known commonly as Purple Dead Nettle here in the states, as we have it all over our place down at the cabin rural property.  The bees love it, so we just mow it when we mow the lawn, it comes back up and the bees are happy campers.

Big Blue Sky

I’ve become much more relaxed about weeds now as I see how much bees love their flowers. I now just try and catch them before they disburse seeds, which seems to be enough  to keep them under control. 
The only exception would be that dreaded japanese knotweed.