Panama Haze, being a 100% sativa does tend to have light green leaves and does not require much feeding at all, especially with nitrogen.
Having grown this strain, it can look a bit sickly due to the lime green leaves but this is perfectly normal and feeding it too much or too often will cause burning, as seen on the leaves of this plant. When feeding her with commercial fertilizers, one quarter of the recommended dilution rate is plenty strong enough and never exceed half strength at any time throughout this plants life, even in flowering. She seems to prefer light feeding regularly rather than heavy feeding infrequently.
This holds true for most sativa and sativa dominant plants with 80%+ sativa genetics.
I would suggest transplanting her into a much larger pot with a well draining substrate (very important!) and not feeding her for 2-3 weeks after transplanting, if the soil is of good quality of course. Adding worm humus and compost to the substrate for the new pot will really please her, as will applications of both seaweed extract (at full strength and at any time, you can not harm a plant with too much seaweed tonic and is very beneficial before and after transplanting) and fish mix/emulsion, which can be used at full strength too, as it is a relatively "soft" fertilizer.
Under no circumstances give it any guano or other "extreme" fertilizers with N/P/K ratings of anything with double digits ie, 7/9/15 or 13/12/18.
This plant seems to grow slowly for the first 4-5 weeks, then once it has established a good root system, takes off like a rocket and will grow 500% - 1000% extra over the next 4-5 weeks of its life, as it did in the first 4-5 weeks of its life, but she needs good room for root growth.
Hope this helps,.........
Organoman.