Carnivorous plants ( also Insectivores) are cosmopolitans, i.e. they can be found worldwide in extreme environments where they have occupied unusual ecological niches by their ability to digest insects to get nutrients.
Their varieties range from the small Drosera rotundifolia which can be found in extremely acidic and nutrient-missing soils in peat bogs to the famous pitcher-plants (Nepenthes) on the peaks of Borneo and Sumatra. Their diversity is breathtaking, each year new species are discovered and it is a fascinating idea what things still wait to be uncovered.
Whoever has read about the moss-forests of the peaks of Southeast Asia or even had the privilege to visit these locations will desire to cultivate the plants of these regions at home.
The mossy forests shelter a unique biological community. The warm and moist air of the lowlands rises up to the mountain slopes, humidity condenses to fog by means of the temperature drop, covering the trees, overgrown with mosses, lichens, ferns, orchids and other epiphytes; an experience which can be hardly described.
The various species, the unbelievable diversity of sizes, forms and colors, the complex trapping strategies and last but not least the earnest challenge to cultivate these plants may be the reason that more and more people are devoted to this group of plants.
Specialized nurseries have answered this trend and propagate large assortments of carnivorous species so that it is nowadays quite easy to purchase interesting species.
Many of these carnivorous plants are quite easy to keep, some can even be cultivated on a windowsill.
The situation however is totally different if you are trying to cultivate the specialist who dwell in the moss forests described above. The climatic parameters of these regions are difficult to reproduce. Botanical Gardens, which can climatize cultur spaces without much concern about cost may provide cooling during the summertime, heating during wintertime and keep the humidity high enough with quite some technical effort.
I, as a fascinated hobbyist, faces the same problem with much less funding.
Following my decision to keep highland Nepenthes in the temperate part of my glasshouse the next thing was the question of climate control. The starting situation was a part of my glasshouse providing heating with a nightly temperature dip including automatic ventilation - which was sufficient for my orchids.
The main problem was that during summertime the air temperature rose up to 45° C in spite of shading and ventilation - impossible for highland Nepenthes and accompanying flora (e.g. ant plants like Myrmecodes, Ant ferns like Lecanopteris, and various orchids.
An ideal situation would be the simulation of the climate of the mossy forests of Sumatra and Borneo: nightly temperatures are 16 - 18°C, during the day not more than 25°C, indirect lights of 40.000 - 60.000 Lux, light air movement and a permanent humidity of 70 - 90 %.
The climatic parameter which I had to control rigorously in my glasshouse were the high summer temperatures and the humidity which was far too low.