Originally Posted by PDX Dopesmoker
the map of the Hunter Valley cannabis infestation in Australia outlines the river system.
They grow along rivers for the same reasons they grow in ditches, just a bigger ditch.
Originally Posted by hunt4genetics
They escaped the farms in 1945, and have been self sustaining ever since.
It's not clear how much if any, or what hemp was grown for victory where exactly, but I would assume that after '37 there were tight controls on seed and farms, so there's a good chance that wartime seed contributes 0.00% to today's ditchweed.
The guy in the video I posted said birds use it as a seed source in the winter, but the ditchweed I've seen lately does not have a single seed past September. The seeds are very small and loosely held.
An unexpected problem with breeding with ditchweed was autoflowering and showers of seeds falling every time a plant was moved slightly. They proved to be dominant traits that just make them a hassle to breed with. This was when SB was still a big thing but I'm pretty sure they would have laughed at me if I asked if they wanted free ditchweed genetics.
In most places it's probably best to stay off gravel roads when you're up to something and have out of state plates. Those are the roads the noxious weed people go down all day and these days in many counties you're not likely to find ditchweed along rights of way such as roadside ditches, and public land in general. Maybe you can find something driving at home with google street view.
If you're just passing through and maybe back again you could drive the interstate looking for some monsters just outside the corn, note the location, and park on the shoulder after dark for a minute. Right next to good light, soil, water, and fertilizer is the only way to get a good sense of potential or problems.
But as the video says a particular ditchweed may have strange desirable traits, so if you were foolish enough to come all this way for ditchweed it's best to most inconspicuously spend a few hours with a few hundred plants and select the best.
I'd find river access points and bring someone else and a kayak and have a float, maybe camp out on someone's sandbar overnight. Airboating in ditchweed country is about as good as it gets, in ditchweed country.