Plant ID forum→is this a weed?

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Northern Illinois
sm001
May 9, 2021 9:30 AM CST
thinking it is golden rod, but, believe that becomes gold in the fall, not the spring

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Virginia (Fairfax) (Zone 6/7) (Zone 7a)
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sedumzz
May 9, 2021 9:45 AM CST
Not golden rod, that's all I know. Don't pull it out yet -- it might be a native plant volunteer you might want to keep.

I woud deadhead it to prevent it from seeding, so if it IS a weed, it doesn't spread.
Name: Sue Taylor
Northumberland, UK
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kniphofia
May 9, 2021 9:56 AM CST
Might be what we call oil seed rape in the UK, Brassica napus.
Cambridge UK
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anothermouse
May 9, 2021 11:10 AM CST
A weed is merely a plant in the wrong place. I agree with Kniphofia that this is a brassica, and a close match if not actually what we know in the UK as Oil Seed Rape.

It's grown across huge fields one year, and naturally seeds everywhere, so continues to pop up for years to come in the surrounding area.
Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

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plantladylin
May 9, 2021 11:27 AM CST
It sure reminds me of Wild Mustard (Brassica sp.). One for comparison is Black Mustard (Brassica nigra) but there may be several species found in Illinois:
http://bulletin.ipm.illinois.e...
https://www.illinoiswildflower...

More information and photos on this Illinois Wildflower page for B. nigra:
https://www.illinoiswildflower...
Map showing Illinois distribution of B. nigra: https://www.nrs.fs.fed.us/data...
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Name: Pat
Columbus, Ohio (Zone 6a)
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Hortaholic
May 9, 2021 11:24 PM CST
Hi sm001,

My farm-dwelling Iowa grandmother called this yellow rocket. It is definitely in the brassica family. It's a weed in the sense that it volunteers from seeds freely after it blooms. The flowers are pretty but the blooming season is short.

My town-dwelling Iowa grandmother wouldn't allow it in her cottage garden, which was otherwise well filled with volunteers of many sorts - larkspur, snapdragons, poppies, daisies, old fashioned petunias, etc., with only stepping stones to navigate in between.

Pat
Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
May 9, 2021 11:27 PM CST
I thought it looked like Yellow Rocket too and I don't even live in Ohio. Smiling
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Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

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plantladylin
May 10, 2021 5:14 AM CST
Thumbs up Here's our database entry for "Yellow Rocket" a/k/a Common Wintercress (Barbarea vulgaris)




More info and photos on this Illinois wildflowers page: https://www.illinoiswildflower...
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!


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