Yeah, since the previous regime, we most certainly did. But actually things got a little tighter a couple years back. Used to be that up to 15gs of weed was still a misdemeanor, not it's down to 10.

You can if you think of the risk of a fine as a thing being legal for a fee. You must not distribute it to anybody, you must keep it below 5 plants and all you are risking is a fine.

Then there is this thing, that they do have to prove "naplnění skutkové podstaty trestného činu", essentially, that a crime has actually happened. You are not allowed to proactively grow marijuana, but if it somehow appears in your garden, you are under no obligation to get rid of it. The crime happens when they can either prove that you are proactively growing it (for example by watering it) , or the moment you harvest the plant and start drying it.

Unless they can prove the crime, there is no crime. Still, it's better to just keep it under 5 plants and possibly pay a fine if your neighbors hate you, which is still way below the market price of the product.