Very Pale, veiny leaves on my Viking

[xeriscape8321]

As i look through my greenhouse i have noticed that my Mirabilis var. Globosa is much paler than the rest of my plants. All the plants were moved into the greenhouse a few months ago and have adapted well. Although my "Viking" has grown by leaps and bounds, and is now begining to show signs of quite a few pitchers forming, I am concerned about the veiny look of the leaves. I know with my brugmansias that's a sign of a nutrient deficiency. Humidy is always high, temps are in the lowland - intermediate range, media is 60/40 long fiber sphagnum and perlite. Plant is in a bright light area but the grow cover on the greenhouse diffuses any direct sunlight. Conditions should be right for this lowlander, and although its growing well, i have concerns about the overall appearance of the lack of chlorophyll in the leaves...
Here is the plant:

<a href="http://extraimago.com/image/ayqC"><img src="http://extraimago.com/images/2016/04/14/IMG_0178.th.jpg" alt="IMG_0178.jpg" border="0" /></a>


<a href="http://extraimago.com/image/ayqY"><img src="http://extraimago.com/images/2016/04/14/IMG_0177.th.jpg" alt="IMG_0177.jpg" border="0" /></a>

 

[hcarlton]

If it's not being fed well, might be nutrient deficiency, but Viking has always been a bit on the paler side of things for me anyway. And N. mirabilis as a whole tends to have a rather veined appearance to it, though more so in pitchers than leaves.

 

[xeriscape8321]

Thanks Carlton, I'll keep a close eye on it for the next couple of months.