Doug Kanter wrote:

Yeah, but what's a home gardener supposed to do with it, other than the
obvious, which would require sharing it with the police?

You'd have to share _lots_ of it. Hemp strains of c. sativa contain
so little THC that you'd have to smoke several pounds of it within
one minute to feel even the slightest effect outside of a nasty
headache.

If you really want to grow something potent, try opium poppies.
Simply take a shaker of grocery store poppy seeds and shake
liberally over the selected area of your garden. Germination
rate should be better than 50%. Harvest by making light, 0.10"
deep incisions longitudinally over the spent, swollen flowers.
Scrape up the gummy exudate and allow to dry, then
collect and press into a ball of pure, homegrown opium.

Difference is, industrial hemp is a class 1 felony, while opium
poppies are completely legal.