Pure Indicas produce the most narcotic stone and this may be desirable for pain relief or undesirable as it is quite sedating. These plants double in height during bloom and are relatively easier to manage in the garden. Potency is not much of a problem with indicas. These plants are best for night time smoke, pain conditions, and end stage medical conditions. They also work great for edibles and yield very well.
Mostly Indicas have most of the yield of a pure indica but a tinge of sativa stimulation to offset the indica sedation. These plants also remain somewhat short and bush out really well with training. This is a good all around medicine for any condition and a good place for a beginner to start.
Potency of the initial rush and of the stone are widely variable in this class.
50/50s have an equal balance of indica and sativa influences. They often grow 2.5x their height in bloom so are less desirable in a short garden. They are more stimulating than sedating so are good for mood elevation. This stimulation can cause panic attacks in sensitive people when too much is taken in. I don't consider this a bad thing. It is a gentle feedback telling you to not smoke so much or take in such big hits. Yield is also variable in this class as the plants that have more sativa influence tend to weigh less despite their more desirable effect. The minimal if any sedation makes these desirable daytime smoke.
Mostly sativas and pure sativas can increase their size from double to triple in the course of bloom. They also tend to yield less but often have a connoisseur high/flavor. It is due to these considerations that these are more appropriate for a seasoned grower.
Indica: Afghani #1(very narcotic), Hindu Kush
Mostly Indica: Big Bud(high yield), Northern Lights #5(relatively low odor), Lifesaver
50/50: Superskunk, White Widow, Jillybean(orange candy flavor)
Each of these varieties were chosen based on personal experience that these are easy to grow, stress tolerant, yield well and aren't bunk. This is not an inclusive list of every good cultivar, just a good starting off point.
Edited by Ohmless, 18 February 2013 - 10:54 PM.