Achillea millefolium is what I think it is.

It looks more like an Achillea sp. to me.

Thank goodness! Its right at my front door, several plants.

how did you jump to poison hemlock???

ken

I put poison hemlock so people would think of it when identifying the plant, because I know young hemlock looks kinda like carrot and this plant resembles carrot. I didn't think it was hemlock though because if you look close in person it has tiny hairs all over it and to the best of my knowledge, poison hemlock, even when young, is mostly hairless. I noticed a little purple on one of these plants, but looks like yarrow can get a little purple too,

I'm not familiar with yarrow yet but reading about the edible and medicinal uses excites me. So ill probably get familiar with yarrow if this is indeed it. I will wait until its mature before even considering using it.

Hemlock leaves look more like those of a fern.

plantid1 - once you get to know both yarrow and hemlock in person you will find that they are pretty much impossible to confuse. That's the trouble with trying to id plants from descriptions or even photos. The two plants may sound or look similar on the page but in reality they are entirely different from each other. Texture, growth habit, smell and conformation are all different, as is likely habitat.

Yarrow has a distinctive scent to the bruised leaves.

Here's what I am calling poison hemlock or Conium maculatum. It is blooming today in Maryland. For us this is a newish weed and is spreading rapidly. It easily can reach 6' height. Several colonies on a neighboring farm and for some reason the owner won't spray herbicide.

Can anyone recommend some kind of organic spray to kill this stuff? Way too many to remove manually.

I'm concerned that something like liquid salt concentrate will permanently damage the soil.

What about cutting them off with a machine?