Proper Fertilizer for container citrus?
Looking for the best way to fertilize my container citrus. I have read many places that I should be looking for a low Nit. count but also a high magnesium percentage (somewhere it said at least 3%). However when i look up Citrus fertilizers, it seems that the counts given do not match this info (14-4-4) (16-8-12) with 0.15% mag. etc, Also, since they are in containers I am assuming that I should look for pellet(time released)fertilizer only? I cant seem to find that many made specifically for citrus. Any clarification from someone with experience would be great, specific recommendations for a brand/where to buy etc. would be even better. I've seen some online recommend Bandini, but I cant find it anywhere to purchase. Thanks in advance, David