Sativas are just about the opposite of indicas. They are tall, thin plants, with much narrower leaves and grow a lighter green in color.
They grow very quickly and can reach heights of 20 feet in a single season. They originally come from Colombia, Mexico, Thailand and Southeast Asia. Once flowering has begun, they can take anywhere from 10 to 16 weeks to fully mature.
Flavors range from earthy to sweet and fruity. The effects of a Sativa is cerebral, up and energetic.
This type of high is the one most associated with hilarious fits of laughter, long discussions about nothing, enhanced audio and visual senses. You hear things in songs you’ve never heard before, see things in movies you’ve watched a dozen times but never noticed before.
Effects of Sativa (high THC, low CBN/CBD):

More stimulating and uplifting
Energizing and thought provoking
Increases focus and creativity
Supports immune system
Best for use in daytime

Benefits of Sativa (high THC, low CBN/CBD):

Reduces nausea
Stimulates the appetite
Fights drepression
Positive, uplifting, cerebral effect
Energizes and stimulates
Promotes creativity
Relieves headaches and migraines
Relaxes muscles, relieves pain
Acts as an expectorant