Hi I just want to know how to plant a Salvia Divinorum an how to take care of it? Tnx!

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Loose soil. I think in the past I had good results with a mix about 1/3 each of potting soil, peat moss & sand. Water well, but let the soil dry out a bit between waterings. Some people to go great lengths with humidity tents and misting and all that, but I've found that if you just stick the plant where you want it to grow (provided it has enough light), it will adjust. It may look unhappy for a while if it's in a new environment, but it will adjust. Feed with food for acid-loving plants (like Miracle Grow Azalea, Camilia & Rhodedendron).

Talk to your plants and visit them, but don't worry about them. Worrying leads to overwatering/overfeeding/over something that hurts the plants.

Whiteflies can be the bane of your existence. I wish I had a suggestion for taking care of them.

Loose soil that holds some water but that also drains well has given me much success with this plant.

I have mine in a raised bed and I never have to water the bed.
The bed is in the shade, so it doesn't get dried out.
I have filled the bed with composted leaves and grass clippings.

The plants themselves were rooted in water with a bubbler.
They were transplanted indoors into a potting mix of kiln-fired clay and coconut coir.

After the last frost threat had passed, they were transplanted into the raised bed. The bed is mulched with grass clippings to help retain moisture. They get slow release fertilizer.

I don't like sand because it is inert, dense, and inactive.
It doesn't hold moisture, it retards drainage, it offers no nutrition, and offers no ion exchange capability.

The kiln-fired clay holds moisture, but being angular, it does not pack well. Both it and the coconut coir wet easily and drain easily, but having being wetted, hold some moisture. By draining easily, air is pulled in to keep the roots happy.