It might be a Lincolnshire ting...
but both my Mum AND my cousin have found spontaneously sprouting (and fucking massive) cannabis plants just growing in their gardens.
Mum reckons it's coz she blows the budgie seed out the back door. But Karen's was out the back of her garage against a fence right down the bottom of the garden and therefore out of budgie seed range.

Whatever the reason, they had some fucking lovely buds on them!!!
( Sallyrsm, Fri 17 Sep 2010, 14:23, 3 replies)

Errr
Bitch...
(Master_Slob UK minister for cultural appropriation., Fri 17 Sep 2010, 17:11, closed)

You'll be disappointed
We had that happen once. Sadly the hemp seeds in bird food have very little if any THC in them, or the plants that grow from them. Smoking them will get you no where.

Trust me, I tried.
(Woodlouse say it with flowers. Send her a Triffid, Fri 17 Sep 2010, 17:44, closed)

Assuming you get female plants
You can extract active components but it's a lot of work for still not very much. Of course they may be original indigenous. Hemp was widespread and widely used in the past.
(unclestinky, Sat 18 Sep 2010, 11:13, closed)