There are a number of sub-species, but to keep you need to take in the general care of chameleons and apply the following specific rules for jacksons:
keep in a 'high mountain' chameleon set-up;
-temp range should be from 16 to 27 celsius and make sure that there are -areas of the viv that are on the cooler side. Many of these have gone down-hill from stuffy high temperatures;
-humidity should be 'foggy' ie 85 to 100%;
-spray very well.
- do not overdo the vitamin supplements. No chameleon takes kindly to vitamin supplements, but this is one that reacts particularly badly esp to overdoses of vitamin A.
- gut-load your feeder creatures very very well to minimise the need for heavy vitamin supplements.
Also, if you're about to buy then get captive bred (thought some may be quite pricey); if you happen to have wild-caught then they are more than likely in need of proper and careful de-worming.
But be aware that de-worming can affect the gut function. So you also need to make sure that they actually hydrate when drinking (you may need to use some AviPro with care) to acclimatise.