Nitrogen Deficiency?

[monty python]

All the leaves on the bottom half of my plants have curled up and died. Also the plants are growing very slowly. Is this an N deficiency. I've been using Miracle Grow (15-30-15) fertilizer.

Should I use a fertilizer with more N? What brands do people recommend?

Thanks.

[llamaman666]

how old and how tall is your plant? if it is young, the bottom leaves naturally die.

[monty python]

The plants are over 3 months old. One plant is 33 inches and the other is 21 inches. There aren't that many leaves left on either one. They aren't growing very fast. Whenever I put them under HPS light the tops start dying so I still have them under fluorescents. I was hoping to get them to a decent size and then switch back to HPS but so far I don't think they could take it.

Thanks for your response.

[LonerStoner]

ditch the miracle grow, get something along the lines of 30-15-10, and then 5-5-10 for flowering. I can't remember any brands off the top of my head, it's been a couple years since I last thought about it.