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How to Grow Cobra Lily (Darlingtonia californica): Methods and Precautions Explained

Growing Techniques By Emily Carter 0 views
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Cobra lily (scientific name: Darlingtonia californica Torr.) is a perennial plant in the family Sarraceniaceae, genus Darlingtonia, mainly distributed in northern California and Oregon in the United States. Cobra lily is a very well-known carnivorous plant species, named for its resemblance to a cobra, and is a collection target for many carnivorous plant enthusiasts.

Morphological Characteristics

The leaves of the cobra lily are dimorphic. The leaves are arranged in a rosette, with each mature growth point consisting of 3 to 14 leaves. Seedlings have simple tubular leaves with tapering tips for the first 2 to 3 years. Young leaves are generally 1 to 3 cm long and range from red-green to red. After that, the leaves of the cobra lily transition to the mature state. Mature leaves already have a trapping function, are 20 to 80 cm long, hollow, with the lower middle part tubular and the upper part bulbous and swelling forward. At the bottom of the front bulge of the leaf there is a 10 to 20 mm cavity, which is the opening of the leaf. The rim of the pitcher mouth curves inward, forming a shape similar to the entrance of a lobster trap. The pitcher mouth is connected to a bifurcated fishtail-like appendage. Nectaries are present on the dorsal side of the appendage and around the pitcher mouth. The bulbous part of the leaf and the upper surface of the tubular part bear a large number of irregular translucent white markings. The inner surface of the bulbous part of the leaf is hairless, smooth and waxy. The inner surface of the lower third of the tubular part bears downward-pointing hairs, 2 to 8 mm long.

Cultivation Techniques

The cobra lily is one of the more difficult carnivorous plants to cultivate. It requires relatively high daytime temperatures and relatively low nighttime temperatures. Its native habitat is marshes or riverbanks into which cold mountain spring water flows year-round, so the roots can remain at a relatively low temperature at all times. Therefore, a fairly good simulation method in cultivation is to grow it in cold, pure water. When the weather is hot, ice cubes can be placed on the surface of the soil to cool it down. In a high-humidity, warm environment, the plant can be given plenty of sunlight; if humidity is low or fluctuates greatly, slight shading is needed.


Growing cobra lily from seedlings is very difficult and slow, so it is usually propagated in late winter or spring from its stolons. Usually from the spring equinox to late spring, many small buds grow on the internodes of the stolons. Cut the stolons into several segments, each with some roots. Then place these stem segments on cool, moist crushed sphagnum moss and maintain a bright, high-humidity environment. Bud development can be seen after a few weeks.


Like other carnivorous plants that grow in temperate regions, the cobra lily needs winter dormancy to survive long term. The plant stops growing for 3 to 5 months in winter. Until near spring, mature plants will produce a single flower, and several weeks later will grow several large pitcher traps. Throughout the summer it will continuously grow pitcher traps, but their size is far smaller than the pitcher traps of spring.

Many growers have successfully cultivated the cobra lily and have found three forms: all-green, all-red, and red-green. Wild cobra lilies are all-green under ordinary sunlight intensity, and take on a red-green color under strong light.
Watering requires water with low mineral content (such as rainwater, pure water, etc.); it is cold-tolerant and afraid of heat, especially the roots must be kept cold, and there must be a large temperature difference between day and night; it likes strong light, and as long as the temperature is not too high, it can accept exposure to sunlight, and the top of the plant will show a red network pattern, which is very beautiful; if fertilization is needed, it can be sprayed at more than 1/5 of the indicated concentration.


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