Light:

Full to partial sun (southern, eastern or western exposure). If they don’t flower, increase the light level.

Temperature:

As a potted plant, maintain indoor temperatures above 60°.

Humidity:

50% or higher; however, they will tolerate low levels with no harm.

Watering:

Bring soil to visual dryness between watering. When watering, thoroughly saturate soil until a little water runs out of the bottom of the pot.  They are “soft growers” and can use lots of water under high temperature and low humidity. A slight wilt does no harm.

Fertilizer:

They need heavy to moderate levels of fertilizer. Give them more under high light. Under most conditions fertilize with ½ tsp./gallon once a week.  If leaves become pale or older leaves turn yellow and fall excessively, increase fertilizer to twice a week until they green up. Use a balanced fertilizer, i.e. 15-15-15 or a blooming fertilizer like Pro Gro ‘Grow’      7-9-5 or Electra 5-10-3.

Pruning:

Prune at the end of the flowering season, which is in the fall or any time growth is excessive. It is generally better to go into the winter months with substantial growth and foliage.

Insects and Disease:

Datura are highly susceptible to whitefly and spider mite. Mealy bug and aphids can also be a problem. They have little susceptibility to diseases of the roots. Foliage diseases are only a problem under high humidity and cool temperatures.

Comments:  

Datura are fast and easy growers, and can flower best under high light conditions. They will flower when plant s are young even under a foot in height. If bloom stops, it is usually a sign of too low a light level.