NEPENTHES
WHAT ARE NEPENTHES? Nepenthes are found through out Southeast Asia, Nepenthes are tropical pitcher plants which grow as scrambling or climbing vines. Their pitchers form at the end of a tendril which extends from each leaf. Not every leaf will produce a pitcher. At the opening around the pitcher there is a slippery liplike peristome. Around the peristome large amounts of nectar are produced to attract insects . The nectar has an intoxicating affect on many insects. They then fall into the pitcher were the fluid at the bottom of the pitcher is usually fairly neutral in pH. When an insect starts to struggle to get out, it signals the pitcher to secrete acids and enzymes in large amounts. The pH in the pitcher drops quickly and in a few day the insect is dissolved. The plant then reabsorbs the nutrient rich fluid.
HOW TO GROW NEPENTHES:
Soil - In the wild Nepenthes grow on a wide range of substrates ranging from clay soil to mossy tree trunks. , it is usually not necessary to duplicate these conditions in cultivation and a single general compost will suffice for most species with few variations. suitable potting media for Nepenthes should be well-drained, slightly acidic, and poor in nutrients. Growers prefer to mix their own, and a simple well-balanced recipe can be made by mixing equal parts of organic and inorganic ingredients. used organic materials sphagnum moss, sphagnum peat, tree bark, and osmunda or tree fern root fibre. provide some moisture whilst being low in pH and relatively nutrient-free. Inorganic materials such as pumice, perlite, sand, granite chips, and clay pellets help to increase drainage and soil aeration, which is an important factor in the growth of healthy Nepenthes roots. Addition of one part charcoal chips assists in aeration and may aid in preventing stagnant media.Nepenthes need light airy soil. The mix can be as simple as 40/60 sphagnum peat moss/Perlite. Most Nepenthes would benefit from an additional 10% - 20% Vermiculite. A wonderful Nepenthes ceader mulch, lava rock, coco peat and medium perlite topped with long fiber sphagnum moss to aid with humidity around the plant. Keeping the lfsm moist raises the humidity around the nepenthes. They like growing in pure long fiber sphagnum moss too.
Light:
Most Nepenthes will grow in partial shade but they will develop more color in brighter light. Most species of Nepenthes require a
minimum of 3-4 hours of direct sunlight per day or about 30-50% greenhouse shade cloth (depending upon local climate). lighting will not only enhance the growth of most species, but it will also bring out full coloration in the pitchers and help to stimulate flowering. lighting is a common problem when growing Nepenthes, symptoms include large floppy leaves and/or failure to produce pitchers.
You can also grow them under fluorescent lights. Use two 4' cool white bulbs and put them on a timer to go on and off with the sun, roughly. Keep the bulbs within 18" of the plant.
minimum of 3-4 hours of direct sunlight per day or about 30-50% greenhouse shade cloth (depending upon local climate). lighting will not only enhance the growth of most species, but it will also bring out full coloration in the pitchers and help to stimulate flowering. lighting is a common problem when growing Nepenthes, symptoms include large floppy leaves and/or failure to produce pitchers.
You can also grow them under fluorescent lights. Use two 4' cool white bulbs and put them on a timer to go on and off with the sun, roughly. Keep the bulbs within 18" of the plant.
Humidity
Highland Nepenthes generally require higher overall humidity than the lowland Nepenthes. Highlanders can usually take more of a fluctuation though. Humidity should never drop below 35% and should be higher at night, this should happen naturally in most circumstances. Some Nepenthes will need misting several times a day to produce pitchers while growing in the open. Low humidity can prevent pitchers from developing but thats usually caused by low light. If it's pitchering it's happy. Pitchers drying up suddenly can mean to low of humidity or lack of water. It can also mean something changed with the light and its no longer enough, like shorter daylight hours in winter. As mentioned, some of the Nepenthes do need higher humidity but you'll be amazed at how many can be acclimated down to 35%. Being wholly tropical plants, sufficient humidity is a key factor in the health of Nepenthes foliage. it is recommended to maintain the humidity at a minimum of 70%, which can be accomplished in non-tropical climates by frequent misting or growing the plants in a greenhouse or terrarium. species with thick waxy leaves are able to tolerate somewhat drier air - these make good candidates for windowsill growing
Temperature:
Highland Nepenthes need lower temperatures at night. A drop of at least 20 degrees is best, some are more forgiving than others. For highlanders, this is more important than the humidity. Some of the easier Highland Nepenthes can be grown in Lowland conditions. Most hybrids are easier to grow too.
Lowland Nepenthes
Lowland Nepenthes grow from 3,000 feet on down. They grow in rain forests, jungles, swamps, on cliff walls, beside streams, just to name a few. The days are hot, and so are the nights. The humidity is high ( 70% + ) and more constant. Lowland Nepenthes are generally easier to grow than Highland Nepenthes. And even though they grow in very high humidity they still acclimate down very well most of the time. I grow all my lowlanders in 35% - 50% humidity, it fluctuates naturally and the do fine.
The care of Lowland Nepenthes is slightly different than Highland Nepenthes. Everything is the same except for temperature and humidity. Lowland Nepenthes do not require a nighttime temperature drop. They generally grow in the 70 F - 95 F range. Many will easily acclimate to most homes so long as they get enough light. Never let humidity go below 35% and for the fickle ones try to keep it constant and above 50%. Low humidity will prevent Nepenthes pitchers from developing. If it's pitchering it's happy. If the humidity drops to far or the plant becomes to dry the pitchers can dry out, fast. Again, light is generally the cause of pitcher formation stopping, unless its in shock from being moved.
Lowland Nepenthes grow from 3,000 feet on down. They grow in rain forests, jungles, swamps, on cliff walls, beside streams, just to name a few. The days are hot, and so are the nights. The humidity is high ( 70% + ) and more constant. Lowland Nepenthes are generally easier to grow than Highland Nepenthes. And even though they grow in very high humidity they still acclimate down very well most of the time. I grow all my lowlanders in 35% - 50% humidity, it fluctuates naturally and the do fine.
The care of Lowland Nepenthes is slightly different than Highland Nepenthes. Everything is the same except for temperature and humidity. Lowland Nepenthes do not require a nighttime temperature drop. They generally grow in the 70 F - 95 F range. Many will easily acclimate to most homes so long as they get enough light. Never let humidity go below 35% and for the fickle ones try to keep it constant and above 50%. Low humidity will prevent Nepenthes pitchers from developing. If it's pitchering it's happy. If the humidity drops to far or the plant becomes to dry the pitchers can dry out, fast. Again, light is generally the cause of pitcher formation stopping, unless its in shock from being moved.
There is a large range of Lowland Nepenthes that grow fine in normal household temperatures/humidity. Some are less picky about humidity than others.
Growing Nepenthes as house plants.
Some Nepenthes can be grown as house plants. Grow them in a hanging basket in front of a window that gets at least a couple hours of direct sun and indirect sun most of the day.
Some Nepenthes can be grown as house plants. Grow them in a hanging basket in front of a window that gets at least a couple hours of direct sun and indirect sun most of the day.
Do not place them over vents or in areas where there is a lot of air movement.
Most do fine with humidity of 35% +. If after a couple months it still doesn't start pitcher formation and your sure its getting plenty of light then try misting it. Mist a couple to several times a day and keep a moist top layer of sphagnum moss and most will do fine. I prefer a pump up pressure mister, sold at most lawn and garden centers.
Nepenthes grown out in the open may loose their pitchers during the winter. It just depends on your environment. Once summer hits they should start pitchering again. This is almost always do to the lower light levels. If you increase the light it gets it will grow almost as fast in the winter as it does in the summer.
Pitcher Health:
Large healthy plants with flushes of colourful pitchers are the pride and joy of any Nepenthes collection. production is a good indication of general plant health; plants which are unhealthy or are kept in non-ideal conditions will often fail to produce pitchers. in healthy plants, each leaf does not necessarily produce a pitcher, and some species appear to produce pitchers only in intermittent flushes. formation can be encouraged by good lighting and high humidity. some species, upper pitchers are more regularly produced on tendrils which have actively coiled around an object. Though there is some evidence to indicate that water-stressed plants are capable of reabsorbing moisture from their pitchers, severely dehydrated plants may drop their pitchers suddenly. Nepenthes pitchers will secrete their own fluid, and it is usually unnecessary to add water to them as this may dilute the contents and render them ineffective for digestion. can be made for those species with reclining lids such as N. ampullaria and N. lowii, or if the pitcher contents have been accidentally spilled. Depending upon the species, individual pitchers may last anywhere from 3 to 12 months. pitchers will usually brown in their top half first, and they can remain in this halfwithered state for several months. are still beneficial for the plant and should not be trimmed until they have completely browned.
