I think i know which you are talking about. I played it a little while back and its really lame. The whole fun in growing weed it to be able to sit and look at your wonderful plants. The little green squiggles on the screen dont have the same effect.
If you are not willing to pay for it it kills your plants after 60 days, i tried a lil sum sum and set my computer clock ahead and all my plants died, now it wont let me go back to seedlings so i just uninstalled it.
No, it's freeware, it doesn't require you to pay for it regardless. You should've read the instructions, "IF YOU SET YOUR COMPUTER CLOCK AHEAD, THE PROGRAM WILL KILL YOUR PLANTS."