Growing your own Salvia divinorum has endless benefits, but I won't go into that. If you're already hip to the jive, then here's the skinny on how to grow your own Salvia divinorum plant.
Decide to use a Salvia cutting.
You must get a Salvia cutting. Check the Resourses listed at the bottom of this article for where to buy fresh Salvia cuttings online.
A Salvia cutting is just what it sounds like: a portion cut off of a full Salvia plant. Cuttings turn into full Salvia plants when grown properly, and this is how most people prefer to grow Salvia.
You either need to get a Salvia cutting or get some Salvia seeds. Roughly 1% of all Salvia Divinorum seeds will ever germinate, so don't use seeds. I'm writing this with the assumption that you are using a Salvia cutting. If you're using Salvia seeds, check out something else I guess.
Put each cutting into a glass of water.
Each glass should have about 1 1/2 to 2 inches of water. If you have multiple cuttings, put them in different containers. This way if one of your cuttings spoils and rots or something weird like that, it won't affect the other cuttings.
Plant your Salvia in a pot.
After a couple weeks of sitting indoors in the water cups, your Salvia plant will have established long enough roots that you should be able to plant it indoors using a pot. If your Salvia roots are around 1 inch long then you know it's time to get some soil on it. Get a pot and fill it with loose potting soil. Make sure to water the Salvia, with the soil completely moist. Again, you need to keep your Salvia buddy inside for two to three weeks so they'll grow some solid rooting in the pots before being exposed to all kinds of weather craziness outside.
Make a humidity tent.
You need to keep your Salvia plant in a moist environment for a few days after you put them in the pot. This keeps the plant from wilting away. You do this with a humidity tent.
So how do you make a humidity tent? Put a clear plastic bag over your Salvia cutting. Boom, there's your humidity tent. You can also just cover the whole Salvia plant with a big, upside-down jar.
Make sure to fan out the humidity every day.
Start giving your Salvia a little bit of fertilizer about a month after you first put the Salvia plant into the pot of soil. Most any general kind of fertilizer is fine, but make sure you don't overfeed your Salvia.
You should transplant your Salvia into a larger pot of soil every few months because it will most likely have outgrown its current pot. Put your potted Salvia inside in some lightly shaded area, and make sure it gets no more than three or four hours of direct sunlight throughout the day.
Enjoy having your own Salvia plant.
Congratulate yourself because you're one of the proud owners of your very own homegrown Salvia Divinorum plant, and you can proceed on to do whatever it is you want to do with a full-grown Salvia plant.