Items needed :
-Backpack/inventory that can carry up to 60 weight or more
-A car that can hold lots of cargo [Eg. offroad, truck] if you want to get a lot of batches
-(OPTIONAL) A weapon most preferably as the processing area for weed is in a KOS Zone (RISKY)
-(OPTIONAL) If you DO NOT have a weed processing license you must bring 7500$ to buy one later. (RISKY)
Step 1 :
You want to go to the weed field just above Zaros or to the right of Kavala.
There you will plant weed which will grow for 32 seconds (wait for 32 seconds) and then you will harvest them in batches of 10 UNPROCESSED weed each (1 batch = 10 weed) .
You need an inventory that can hold 60 weight for 1 batch and a vehicle with big storage if you want loads of batches.
Step 2 :
Make your way to Gang Hideout 1 with your UNPROCESSED weed.
There you will process your weed (You require a license/training to process weed which costs $7500 once you have CAPTURED the flag at the area). You must capture the flag in order to process weed but be careful as whoever owns the area will be notified of your presence.
Next after you captured the flag you want to start processing the weed in the building next to the flag at the 2nd floor.
Step 3 : Once processed make your way to the closest ILLEGAL GOODS TRADER (To the left of Gang Hideout 1) and sell your weed.
Tadaaaaa. You now know how to do Weed!
Comment if I left any mistakes!