I actually bought a Russian Sage plant on purpose. It has not spread. Lamb's Ear seems to love spreading here more. Not sure why. Darn shame you're allergic to it. I'm allergic to Ragweed, Hyacinth, Lilac & Mums bad, but not bothered by Lavender or Russian Sage. Go figure.
The cursed weed I battle that makes me swear like a Sailor

& hurts my carpal hands, wrists & even elbows...is dreaded Nutsedge. I'm telling ya...I've never been so ticked off at a plant before!!!

I ripped out one 12 foot length grown up against 1 coop pen & It Took Hours & I Still Have To Dig Out the Damn Balls in the ground! So there goes my lower back!
Nutsedge was growing tall down the side of coop pens, that stuff is hard to mow, I Pulled most of it but you can see the clumps I could not pull. Need the shovel to finish & get the cement-like balls dug out.
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The balls are like a string of pearls out in the yard, but when up against any structure, wood, block foundation whatever, it becomes a massive boulder made up of pearls that are like cement & they get up against wood or masonry & attach like a freaking concrete leech! Yup, I am not typically foul mouthed, but that crap makes me cuss alot. It is the one thing I wish my flock would turf & dig up, buy they avoid it, too. It must taste bad. (Wonder what goats would do?) Well, eating the top does nothing, it needs to be dug out & this crap can go pretty deep. Miss 1 little pearl, the size of a pinhead, and it's back! Well, it is what it is,

we all have that 1 weed we hate most, don't we! I am going to do my best to dig out as much as I can, when I can (so yeah, we're talking "Ongoing project" probably til the day I die).
When I get a section as clear of it as possible, I plant mint. Mint, you sweet smelling & pretty plant, you can grow along the chicken pens as long and as lush as ya want...please keep that damn Ball Grass out. (It does seem to help, where I've planted Mint before, that infernal sedge does not seem to invade as bad...I still need to look & pull what I see popping up amongst the mint, but it does not come back as strong. I call the sedge "Ball Grass". It's a long strand of grass above ground, but below, the roots are not roots, they're little round balls, not shaped like wild onion or scallion, just perfectly round, with no smell. When we 1st moved here, I'd pull it up, & there were these round white or greenish balls at the ends. I'd never seen it before. I mentioned it to a neighbor...what is this crap? Obviously, he never gardened, he said an onion? No way. Well, I needed to ID what this crap was, I could only describe it as "Ball Grass" which always got some laughter, but trying to eradicate this crap is no laughing matter, especially when trying to maintain an organic property. I am really so disgusted with this weed. The worse part...it is All Over! I think the previous owners planted it deliberately. Yeah you can mow it, gives the illusion of a green lawn, but try to plant anything else. Ugh, it is a nightmare I tell ya. I thought Bermuda Grass was bad (got that, too). Well Nutsedge Ball Grass Sucks Bigtime!!!