Well that's news to me.
It's still totally illegal here although the guardia mostly seem to turn a blind eye & you can grow a few plants for your own use but it must not be visible to the public,
I'm in Andalucia but in other junta's it's a little different. In Barcelona they have coffee clubs where they'll grow your plants for your own use - not for free & I don't know much about it (easy to Google if you're interested) no legal growers that I know of. Very few proper grow shops as far as I know.
I live out in the sticks & mostly stay home - so what do I know.
I buy my seeds, ostly by, mail order from a Dutch supplier.
I understand there's a few clandestine weed supply places.
It's not something you think about when you grow your own,