Im thinking about doing an outdoor grow also. I did some looking around and i got two answers on a soil recipe. Here they are.
#1. 1 PART supersoil,1 PART Manure(your choice),1 PART Bone Meal(dried),1 PART Blood Meal,and lastly 1/2 bag of Perlite or Vermiculite . Watering needed throughout season..enjoy! KEEP SMOKE ALIVE!!
#2 The best one time fertilizer is more than a fertilizer. I got turned onto this stuff a few grows ago. It absolutely rocks.. Blue Mountain Organics - Super Plant Tonic. You can find it sometimes on Ebay under Organic Fertilizer or Organic Plant Tonic. They do not have a website or store - a community of Hippies living in the Ozarks make this stuff. It has worm castings, coral calcium, blackstrap molasses, humic acid & mychorizzal fungi. The friendly fungi in it, break down absolutely everything present in the soil by bioconversion. So, if anything else is grow in the soil - this stuff will ensure you plants will too. Bioconversion you ask ? Yes, they eat, then poop out NPK so small, plants suck it right up. Plus they attach themselves to the roots ( the fungi - look like little white strings attached to the roots ) and make your plants plant better able to withstand dry period when little rain falls. I swear this stuff has fairy dust & troll turds in it - it's magical. Once it is soaked in good around the roots of your plants - it is like have little farmer's tending your plants - bringing in extra water from hundreds of strands of fungi tubes, supplying NPK from bioconversion, even killing off bad fungi. So, check it out. You'll be glad you did. Oh, and best part - it's pretty cheap. Thank Goodness - Hippies are not greedy....