AdrenalinX
Bluelighter
If you're looking for yield you definatly want a nice indicia plant. I think the square meter is how much space you give the plant. There are strains like Big Bud that yield a lot but the quality isn't top notch. I'm kinda going from memory but I think some nice yielding strains are Northern Lights, Hash Plant, Afghani, White Widow and AK47.