Intermediate Nepenthes are classified by their native growing altitudes of between 1000 and 1500 metres.
Day: 24-29° / Night: 13-18° C
All Nepenthes are susceptible to damaging effects of minerals and salts in their water.
Distilled, reverse osmotic or clean rain water are the preferred forms however most nepenthes can cope with town water up to 250ppm…. it is however recommended that you flush their substrate out every few weeks to remove any mineral/salt build up if using this form of water (or any other forms such as bore/well or river water).
Nepenthes should never be waterlogged (by using trays or non draining locations). They should also never be allowed to dry out.
They thrive in moist but airy conditions around their root systems which can be achieved with regular watering and the following substrates.
They will also enjoy regular misting with purified water.
There is no set mix that covers them all so please experiment with a variety to find the one that keeps moist but not wet and allows air around the roots (porous) without drying out between watering. We find that keeping it simple with two or three ingredients (such as perlite and coconut fibre for drainage/aeration mixed with some sphagnum moss for water retention works well generally in humid areas).
Good substrate materials are: perlite, coconut fibre, coir chips, tree fern fibre, sphagnum moss, pine bark, peat moss, activated charcoal, pumice, triple washed quartz gravel and silicate sands.
Most of these materials are available Australia wide.
Your particular mix will depend on the type and size of pots/containers, the plant size and their location, such as windowsills, greenhouses or terrariums as well as your local weather and humidity conditions.
Do not use clay pots as the minerals/salts tend to get retained in them which will in turn make your plants suffer.
Keep away from materials with “added nutrients” at all times….look for “power” or “feed and mulch” on the label and put them back on the shelf!
Re-pot your nepenthes every couple of years as the plants outgrow their containers or if the materials break down (spag moss is notorious for this) or the mix dries out too fast or stays sodden…..a “middle of the road” mix will keep your plants happy.