yea right now, the question sativa or indica is kinda a rediculous question. most strains are hybrids. 50/50, or 75/25 or some other mix, but a pure indica or pure sativa... do they even still exist really? we´ve bred plants so much, and inbred them so much that seeing a pure strain isnt likely.
otherwise, you need to water a LOT more when you do water. water until you get about 1/4th of the pot size in run off. every part of the soil should be watered, not just the top center, but the edges of the soil where they meet the pot.