Dude, the only way a seed matters is what strain your crops yield. Your growing process and curing process is everything. You could have a White Widow or Sour Diesel seed, poorly grow it and poorly cured, and it would taste like some regular schwag. The way you preserve the weed and keep it while you're in possession of it determines it's shelf life. Light, heat, and oxygen degrade THC. Air tight, cold (but not freezing (causes water if not completely vacuum sealed. Water also degrades THC), and dark places are the best. Like a mini fridge or something in a GLASS, airtight jar. All you need to keep the dank freshness of your goodies. Happy Holidays people.