Miracle Grow

I have been watering the plant with only water lately. Earlier I had only watered it with Miracle grow in the water. I did this change not because i really wanted to, but because i was too lazy to mix more miracle grow in the water pitcher. well, i have noticed that the plant grows significantly slower with only water compared to with the fertilizer. I know that reading about the banana plants it says the fertilizer is very important. I think they are right!