IMO the spectabilis doesn't look that bad. I think it's just shipping stress. If it starts to get worse you could always use ice bottles until conditions get better. During the peak of the summer I started putting a couple smaller plants in a cooler with a couple bottles just in case. Easily takes temps down into the 50s.
The bical leaves are all old leaves. The one leaf pointing directly left is sort of a new leaf. It was starting to unfurl when I got it. That leaf is making a pitcher though and doesn't seemed to be hindered in growth. I don't think its pots size either, but I'll double check tomorrow for any media or root issues.
Do bicalcaratas need peat in their media mixture? I read at one time that some grow in more of a bog area. Anyone else grow bicals that might have insight?
This bical is the 'Brunei Orange' variety if that helps any.
I have Bicalcarata x Ampullaria. Very slow grower and I've heard that bicals like very hot and humid conditions. I'm using 1:1 LFS/perlite for the hybrid.
Looking for N. Campanulata hybrids. Also would like to grow some nepenthes from seed. Growlist/pic thread: http://www.terraforums.com/forums/sh...-Pete-s-plants
Bical can grow in peat/perlite mix, but it does fine in LFS as well. I don't see one is better than the other. The dark spots are likely due to the change to high light level. New leaves should adapt. Not sure about the chlorosis. The pot is ok for next 2 years growth.
Hi there! I have had and successfully treated this issue (burned leaf margins) on my bical. I believed it to be potassium deficiency (it's a very big, vigorous plant and needs a lot of nutritional support for its tissues, and actually I am suspicious that all the nectaries on the leaves may consume potassium as well) and gave it some dilute potassium nitrate and the leaves turned perfect and green. It doesn't heal the damaged leaves but the new growth will be healthy and it does take about a week to notice healthy growth. Funny story--I have a banana in the same greenhouse and noticed this marginal leaf burn for a long time. I fertilize it all the time, but apparently bananas are monstrous consumers of potassium, which is why everyone says they're rich in it. Anyway, I laid a couple massive tablespoons of pure potassium nitrate in there (it's in a big pot) and BAM, totally green and perfect leaves. Same pattern on Nepenthes, same treatment, except I used I think 1/16 or 1/8 teaspoon per gallon. I am almost positive a normal garden liquid fertilizer will work at 1/8 or 1/4 teaspoons per gallon. I have used up to 2 teaspoons (~400 ppm Nitrogen) of 20-10-20 liquid fertilizer on all my Nepenthes with no burns whatsoever and no problems. Applying in cooler temperatures (i.e. before nightfall) is much less likely to burn and since you're in Hawaii you might want to strongly consider this. While they don't need even half of that (over time I have learned that they like about 100ppm bi-weekly), I still just wanted to throw out there that I've pushed these plants to figure out their limits. Over 400 will kill almost any plant.
As for the other Nep, I am thinking immediately that it's sunburn but am not sure. Does not resemble any kind of nutrient deficiency at all. I am wondering--was the plant moved at all recently, whether by you or knocked over by animals? It looks to me that another leaf of something developed over the area that is burned, causing the leaf to look slightly paler than the others and making it more prone to burn. Tropical sun can probably easily do this if so. Did it develop in the shade, or perhaps a tree dropped a leaf on it? Also--did that particular leaf develop in your care or the original grower's? It is likely that something like I described above happened at the nursery, since often plants are crammed together. Was the nursery in the tropics or temperate zones (i.e. how strong was the sun there?). The plant may have been shaded there, been removed and shipped to you with that weakly developed leaf, and been prone to burn from the very beginning. The rest of the plant, IMO, looks perfectly healthy, nice thick sun-adapted leaves, and I don't expect you should have future problems as it grows out. Hope this helps!
Potassium deficiency on banana leaves:
This next one shows a very similar pattern (marginal burn) on a range of species
N. bicalcarata is notorious for disliking change. Probably just the original leaves showing a bit of adverse reaction to the change. If you start seeing the same symptoms though on leaves produced in your care then there is clearly an issue to be concerned with. Perhaps as suggested, some sort of nutrition thing but with N. bicalcarata it could be environmental also. Yes it's also possible that the much smaller seedlings next to the larger plant are not as affected. They tend to be more forgiving than the large size plants of this species.
Oh woops forgot to mention the N. spectabilis. Looks like that one leaf has typical sunburn. It also appears to have moisture stress.. the offcolor green, the somewhat curling under of the leaf edges etc.
Is that a Nepenthes in your pocket or you just happy to see me?