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It is very easy to be deceived into thinking that orchids are parasites. At first glance, appear to be the nutrients that are derived from its host tree, as it roots attached to the tree bark and grows over his "guest." Closer examination reveals that orchids are only plants growing in support and not parasitizing them.
Many varieties of orchids are called epiphytes, which means they live "on air". A more accurate description is that the roots of these epiphytes absorb water and nutrients from the air and therefore require good ventilation to prosper. These epiphytes also have more exposure to light of the floors above the forest floor.
If you take the time to observe these orchids hanging from the trees, you will see that it is often found in the crotch of the tree branch. A large amount of organic matter such as leaves, bird droppings and branches are divided into these areas, and this material is what epiphytic orchids use of nutrients.
These trees are the perfect place for the roots of an epiphyte grow and get the nutrition. The fall feeding on organic matter orchids, tree height of orchids exposed to a lot light and wind, and the orchids of the added advantage of being protected from most herbivores walking along the ground. No Orchids parasitize their hosts, but instead "hitchhiking" on these great plants to get an advantageous position.
"Hitchhiking" Versus True Parasitism
Comparison of epiphytic orchids with some parasites, is at least one important difference between them. The roots of the orchid, just sit on the surface of trees, while the roots of the parasites are introduced into the host tree to suck the sap.
One of the most dramatic examples of a parasitic plant Cuscuta is most commonly known as dodder. This plant nightmare seems deceptively simple enough in its early stages, but can grow to spread to a tall tree, while choking to death.
Even innocuous used mistletoe during Christmas is a parasite that can slow the growth of its host.
"Hitchhiking" on the contrary, it simply means that the orchids are a place to "sit" on the host, and then get the nutrition from the surrounding environment. The host plant will grow without interference from the orchids.
So there you have it. You do not have to worry about your other plants now that you know that the orchid is a parasite. All you need do is provide a good place for the orchid to receive enough light, humidity, moisture and nutrients.
Michael Anderson is co-author with Steve Frowine (author of four orchid books including the Orchid title of a well known series) of the web site, UncutOrchids.com. To get a free, 40-part video course on orchid care and the Orchid of the Day newsletter, click now on this URL: UncutOrchids.com. Michael lives in the enchanting town of Guanajuato, Mexico, where he also offers Guanajuato rentals to vacationers and visitors.
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