I've been growing Speed Queen for a little over a year now. Although I haven't gotten the biggest yields from them it is a good strain overall.
I've always used Fertilome or Sunshine LC1 mixed with several organics; worm castings, bat guano, kelp meal, dolomite, greensand. Overall the crops seems to progress well. I usually get around an 1.00 to 1.25 ounces per large plant vegged for 3 to 4 weeks and grown in 2 to 3 gallon bags.
I usually have to start adding nutes at the start of flowering, preferably organics but standard nutes will suffice. My biggest plant problem is usually multiple small rust/brown colored spots mostly affecting the middle fan leaves, but this rarely seems to affect yield.
I will be trying more Mandala strains when they come available in 2009.
Later,
Greenbringer