Tropical Sundew Care
Get the straight facts from guys who grow and propagate thousands of carnivorous plants every year.
Tropical sundews are as weird and wonderful as carnivorous plants can get. They come in a plethora of shapes, sizes, and colors, and most are surprisingly simple to keep! Below are a few of the most common tropical sundew species you might find in cultivation:
While there are certain characteristics to each variety, the general care is the same for all of them. Use the following guide as a general rule to growing tropical sundews.
Tropical sundews originate from warm climates of the world. South Africa, Australia, New Zealand, and South America are all hotspots for tropical Drosera. In their native habitat, frost never or rarely occurs, and it never snows. Their preferred habitat is mostly open, wet fields, or cliff-side seeps with thin, weak soil where they can get lots of sunlight.
Where to Grow
Many tropical sundews can be quite adaptable. A sure-fire way to keep them is indoors as a tropical houseplant on a sunny windowsill. If you live in a tropical climate where the temperature rarely drops below 55°F (13°C), you have the option of growing your plants outdoors. Regardless of where you grow them, always protect tropical sundews from excessive wind, harsh sunlight, and especially freezing temperatures.
Provide partial sunlight (several hours of direct sunlight with bright filtered light during the day). Avoid full shade. Direct sun can burn them, though with determination, the tougher species such as Drosera capensis can be acclimated to more extreme heat and direct sun over the length of a few seasons. Other species, including Drosera spiralis and D. graomogolensis, should be kept inside to protect them from harsh weather.
If a sunny window is not possible, you can use strong fluorescent lights (a minimum of 40 watts in actual output). Start with the lights approximately 12 inches above the plant. Monitor your plant and adjust the height of the light source if you are not satisfied with its growth. Use an electrical timer to maintain a photoperiod (consistent daylight hours - 14 hours is sufficient throughout the year).
All sundews require mineral-free water. If your tap water is relatively pure (less than 50 parts per million in dissolved minerals), then you can safely water your sundews with it. Otherwise, you can use distilled bottled water. Keep the soil wet at all times. You can do this by setting the plant in small amounts of standing water, up to halfway up the pot.
Use a soil mixture of 1 part peat moss and 1 part perlite. Never use potting soil, compost or fertilizer; they will kill your plant.
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- how sunlight and water affect plant growth.
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