I have one carrot that survived last winter in-ground. It's not blooming yet, but it's from seed Joseph Lofthouse sent me, so I expect it to produce pollen of it's own. There's a common weed around here that I never paid attention to before. It's leaves and blooms are pretty carrot like, so I looked it up. Poison hemlock. It's all over the neighborhood, but I have a stand of it you can't even see through, ~100-150 yards from my carrot. If blooming coincides, is the pollen likely to travel that far? How likely is the carrot to be compatible? Are carrots self-compatible? If I end up with a carrot / hemlock cross, is it 50%-50% odds it'll be poisonous? Or more like it WILL be poisonous, but less so than pure hemlock? If crossing and poisonous offspring are possible, is there a reasonable way to mitigate the danger? I'd sooner dispose of the carrot before it flowers than risk poisoning myself or someone else, but I hope it won't come to that. Carrots aren't very happy in my garden. I'd love to adapt them.
Night and day, whether he sleeps or gets up, the seed sprouts and grows, though he does not know how. -Mark 4:27 niv
You can get rid of the hemlock easily. Our allotment gardens had it and I eliminated it in about five years by not allowing it to set seed.
The seeds do not remain viable for long, so the soil seedbank was soon exhausted.
I continue to monitor all the plots, though, as fresh seeds might be brought in on grass clippings or in truckloads of leaves brought in for mulching, and inexperienced gardeners might not recognize it.
Victoria, British Columbia, Canada a cool mediterranean climate - rainy winter, dry summer