SATIVAS - The polar opposite of indicas. Tall, thin plants, narrow leaves, lighter green colors, grow quick, extend to heights of 20 feet in some cases. Origins are traced back to Mexico, Columbia and southeast Asia. Flowering times vary from 10 to 16 weeks, normally longer than indicas. Taste ranges from earthy to fruity. A good head stone. A great outdoor favorite.
INDICAS - Short thick plants, broad leaves, darker green, flowering in 8 to 10 weeks with thick dense flower tops. Flavours from stinky skunk to fruity sweet. Origins traced back to Afghanistan, Morocco and Tibet. More of a body stone. Indoor grower's favorite types.
FEMINIZED - Designer qualities to produce only female plants. Rarely are the seeds produced but can be forced. Usually passed on as clones.
CROSS BREEDS - Combining different sativa and indica breeds will produce the corresponding traits of each mother and father. Actual percentages each strain will contain is not exact, but pretty close.
INDOOR / OUTDOOR - The most important thing to realize is the length of flowering time. Indoor doesn't matter but outdoor maturation would depend on your climate. If you have a short summer then go with a more indica strain. Remember, the more sativa in the mix the longer the flowering time. Some types of marijuana are specifically bred for outdoor, just look at your details. For indoor growing, don't choose something that says outdoor.
HEIGHT - Sativa stretches the most. Height is usually listed but can be controlled indoors. Light usually does not reach down past 3 feet sufficiently enough. A well grown plant can grow 1 to 2 inches a day. A two foot plant, put into flowering stage will reach just over 3 feet when done maturing in approximately 8 weeks.
POTENCY - Most marijuana these days is super potent. Success of course depends on your green thumb and growing conditions. To maximize potency use a hot, dry atmosphere and drop the humidity when flowering.
YIELDS - This all depends on how long you let your cannabis plants vegetate before flowering. Obviously the longer the vegetation period the taller the plants, therefore more yield. Maximum indoor yields come from indica.