In my opinion you get better yield with more than one plant, i would do at least four. But it seems that you harvested pretty early when i look at all the white hairs in the last photos!? And hey, yield is not everything, you have to be happy with your final product, that's the most important.I got 199 grams dried to the point it will turn to dust under pressure. Buds are fat, I couldn't have got more bud into that tent. But I'm still down below 0.7 per watt.