Currently there are 4 types of plants:

Red-Hair
Purple Haze
White Widow
Blue Mystic

(there are plans for more I assure you)

You must research Red-Hair first, it grows the fastest and the payout is the least.
After you research it, Purple Haze and the Rolling table will be able to be able to be used.
And thus, the White Widow is the last thing to research and unlock.

UPDATE -
Now with Blunts!

UPDATE -
Now with Pot Candy (1 type for now, the other 3 soon)

Added the 4 types of plants listed above as being able to be blunts too. You must research the blunt table and build it, then you can que up jobs to roll blunts. They take more resources, but are worth more and have higher effects. (More updates to come)

I believe its something like 5 days for the Red-Hair and around 10 for the White Widow. I see that people are using the mod, so if you have any feedback on growth times, and payouts, please let me know! I want to make it balanced and worthy, but not game breaking. I want this to be a good alternative path for money growth that is worth while, but also not making you a drug king over night, but I suppose some power gamers will do just that anyways from hardcore grinding and growing.

After it is grown, it can be sold, but it is worth much more to convert it into joints with the rolling table. Also, need feedback on the values of both products, I am going to tweak them tonight and tomorrow anyways, but keep me posted, if you notice something "feels" more right or "feels" padded, let me know.

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Traders - These objects were added to the existing traders, let me know how the prices feel, and if you are indeed seeing them for sale. Also let me know if you can see to them, some won't buy but if none do, I need to look into that, but so far internal tests seem okay.

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PLANS -
Pot Exclusive Traders - (In the Works - ETA "Soon"tm)

Bong - (Planning stage)
^if that works, then Pipes too ( portable version if also possible)

Do we want Hemp too? Was thinking about making this more along the lines of the mods name, but if there is enough request I will add hemp fabric as well.

Pot Edibles - (Planning stage)

Dabs - an even higher teir of refinement (pun intended)