What are these tall green plants that started growing in my garden

Question

Please help me identify these tall green plants they are now 3 ft high

Answer 1

The green ones might be pokeweed, picture is kinda small and I don't recall if it's common out west - I certainly had one pop up in my garden again this year, they are commonly spread by birds and grow fast. They are poisionous (some sources say "unless boiled" others say "period.")

Answer 2

Well they look like Impatiens to me - can't see the detail of the flower, but the leaves are certainly like Impatiens walleriana, though there are other varieties. These seem a little taller than usual though, and they don't usually pop up on their own from seed, though it depends where you are to an extent. Is it possible you had some planted in that pot last year? Because if you did and they survived the winter, that would explain the increased size. Link to image (it's the first picture) here https://uk.pinterest.com/pin/562035228476275270/ They might be Impatiens New Guinea hybrids - they are taller.

If that's what they are, you can collect the seed, but when the seed pods form, you have to prepare to collect the seed before the pod explodes and shoots its contents all over the place - instructions here http://homeguides.sfgate.com/seeds-impatiens-flower-21048.html

Seeing an open flower clearly, and the seed pods as they form, would help to confirm or deny this ID too.