It has the appearance of Taragon.

Hmm...Russian Tarragon, maybe, or maybe Mugwort--the latter is quite invasive with underground stems. Does it have an astringent, slightly lemony or licorice-like scent?

Thank you .No smell at all.It seems to grow quite quickly.Might leave one and see if any flowers develop.

Not sure but I'm wondering if it's a Cosmos?

The leaves are very jagged if that's any help.Sure it grows as I look at it!

Then that would not be cosmos since the cosmos I has seen have lacey like leaves.

The foliage does look like Orange Cosmos (C. sulphureus).

It also looks very like a flower I asked an ID for a couple of years ago. The answer was Gilia Capitata. Once you have these, they pop up everywhere , every year. Bees love them.

Lovely fluffy blue flowers, too!