The plants growth rate accelerates with each new leaf and is more than double from 1 week ago. The plant is showing leaf curl. The leaf color is normal. I started the week with a low EC, high volume fertigation. Obviously there is a nutrient issue, but the plant is still vigourous. So I will do another high volume low EC fertigation and tweek the nutrient solution to compensate for some of the possibilities of deficiency or toxicity.