What fertilizer are you planning to use? If you're using a water soluble fertilizer, I would fertilize them the same way by adding the amount of fertilizer the package calls for to your water and "fertigating" when each plant needs water. If it turns out the plant in Miraclegro needs to be watered less often than the one in 5-1-1, then make a stronger solution for the MG. So if your fertilizer calls for one teaspoon per gallon of water once a week, and the 5-1-1 needs to be watered 3 times a week but the one in MG only needs watering once a week, give the 5-1-1 one-third of a teaspoon in water three times a week and the one in MG one teaspoon in a gallon once a week.