I didn’t realize barberry was invasive. Wonder if there is a sterile variety. We plant lots of it here in Georgia. In fact, I just rejuvenated a barberry shrub that had no other seedlings coming up.
Good to know.
BTW, I am planting a field of Karl Foester and Muhli grass behind boulders in two weeks. I am looking forward to this job.
Japanese Barberry is a problem if it gets into our woodlands and pastures. Just as bad as wild rose.
I would carpet the Earth with Karl Foerster Grass if I could. Love the stuff!
Classification in Wisconsin: Restricted (this restriction only applies to the parent type, the variety atropurpurea, the hybrid of B. thunbergii x B. Koreana, and the following cultivars. Berberis thunbergii cultivars: Sparkle, ‘Anderson’ Lustre Green™, Erecta, ‘Bailgreen’ Jade Carousel®, Angel Wings, Painter’s Palette, Inermis (‘Thornless’), Pow Wow, Golden Ring, Kelleriis, Kobold, ‘JN Variegated’ Stardust™ and Antares. Variety atropurpurea cultivars: Marshall Upright (‘Erecta’), Crimson Velvet, ‘Bailtwo’ Burgundy Carousel®, Red Rocket, ‘Monomb’ Cherry Bomb™, ‘Bailone’ Ruby Carousel®, JN Redleaf, Rose Glow and Silver Mile. Hybrid of B. thunbergii x B. koreana cultivars: Tara and ‘Bailsel’ Golden Carousel®)
So, lots of nursery growers losing lots of money and having to destroy stock.
https://dnr.wisconsin.gov/topic/Invasives/fact/JapaneseBarberry.html