Why are you watering with only 5.8pH? Get that up to 6.3-6.6ish range for better uptake of nutrients. Looking good though so far, I think you could get a real nice boost if you correct the pH.
@Garreweedlover, Soil range between 6.0-7.0 is optimal so your good but give it a lil bump up next time maybe water with 6.5 instead of 5.8. I bet it would work quite well. What soil are you using ?