unfortunately all but the 1st grow here has been somewhat horrible. the plants from that grow were grown with the sun most of the day for a month and then set inside under an inexpensive setup (lights around $75, roughly $25 per light) for flowering. i used a 50/50 backyard soil, purchased compost mix with a very small amount of organic fertilizer. i would consider it had to do with the seed genetics and i gotta imagine was fairly palatable growing conditions.
to be honest i'm not very knowledgeable in too many aspects unlike many here at thcfarmer. they could definitely give you a good heads up as to things tht might improve you bud. i would imagine that it might be a genetic disposition of the strain though. you might post a pic on the trainwreck thread and someone might give you more insight. if you post it to Eledins universe thread he might be able to benefit you, he's been very helpful to me.