Damon Mcknight
Mistletoe is a semi-parasitic plant that grows on host plants and has a preference for certain species. It is often viewed negatively due to its sap-sucking nature and ability to mimic its host tree, but it is also beneficial to various forms of wildlife and can be grown both indoors and outdoors. Australia is home to 90 species of mistletoe, 70 of which are native, and while it can be challenging to cultivate, understanding its growth requirements can increase your chances of success.
| Characteristics | Values |
|---|---|
| Location | Australia |
| Number of Species | 90 |
| Number of Native Species | 70 |
| Common Host Plants | Apple, Hawthorn, Lime, Poplar, Conifers, Eucalypts, Banksias, Wattles, Mangroves, Casuarinas |
| Growth Rate | Slow |
| Germination Requirements | Light, moisture, temperatures of at least 16°C |
| Plant Type | Semi-parasitic |
| Self-manufacturing | Food |
| Requirements from Host Plant | Water, support |
| Prone to Damage | Not prone to damage from insects; has few disease problems |
| Prone to Cause Damage | Can kill host plants; can cause serious disfigurement to host plants |
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What You'll Learn
Mistletoe is a semi-parasitic plant
Mistletoe seeds are often dispersed by birds that consume the berries of the plant. The seeds can be spread through the bird's droppings or when the bird wipes its beak, causing the seeds to adhere to the bark of another plant. Some mistletoe species have bursting fruits that shoot their seeds onto other trees at speeds of up to 80 km per hour.
After mistletoe germinates, it forms a connection with the host plant through a modified root called a haustorium. This structure allows the mistletoe to extract water and nutrients from the host. While mistletoe can survive and reproduce solely on a living host, it does not seem to be a significant nutritional drain on the host plant.
Mistletoe is often considered a pest and has a bad reputation due to its parasitic nature. It can parasitize a variety of hosts, including ornamental, timber, and crop trees. However, mistletoe is also important and beneficial to the ecosystem. Its flowers, fruit, nectar, and leaves are highly nutritious and serve as a food source for a wide range of wildlife, including koalas, sugar gliders, possums, birds, and insects.
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How to germinate mistletoe seeds
Mistletoe is a hemiparasitic plant, which means it obtains water and mineral nutrients from its host tree but produces its own food through photosynthesis. It is often associated with Christmas, when bunches are hung as decorations. The most common type of mistletoe in the UK is Viscum Album, which is a parasitic evergreen hardy shrub that bears white berries in winter.
To germinate mistletoe seeds, you will need to start by harvesting the berries in March or April from mistletoe that has been well-established on a tree. Avoid using berries from shop-bought mistletoe, as these are usually harvested before the seeds are mature enough to germinate. If the berries have dried out, you will need to rehydrate them by soaking them in water overnight.
Once you have fresh berries, squeeze them gently to extract the seeds, which will be covered in a sticky, jelly-like substance called viscin. It is safe to do this with your fingers, but be sure to wash your hands thoroughly afterward. Wipe the seeds partially clean, leaving just enough viscin for them to stick to the tree.
Choose a host tree or shrub, such as apple, lime, poplar, hawthorn, or a member of the Rosaceae family. The host tree should be at least 15 years old and well-established, with branches that get plenty of direct sunlight. Select branches that are smaller and newer, with a diameter of around 15-20 cm, and push the seeds into nooks and crannies in the bark on the underside of the branch. You can also make shallow slices in the branch to lift up the bark and place the seeds inside, although this is not necessary.
After placing the seeds, you don't need to water them, but you should label the branches so you can remember where you planted them and check on their growth. Germination may take several months, and you may not see noticeable growth until the fourth year. Look for tiny green stems with no leaves as a sign of germination.
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Choosing a host tree
Mistletoe is a semi-parasitic plant, meaning it manufactures its own food but relies on its host plant for water and support. The host plant will also be the source of nutrients and moisture for the mistletoe. As such, it is important to choose a suitable host tree for your mistletoe.
Mistletoe has a preference for certain host species. In Australia, some of their favourites include eucalypts, banksias, wattles, mangroves and casuarinas. Orchard apples are also perfect for mistletoe growing. Other favourite hosts include apple, hawthorn, lime, poplar, and conifers.
Mistletoe can also mimic the host tree they are living in, making them almost impossible to detect. This is why you will have to look up in the canopy to find them as they grow high up in the tree.
When choosing a host tree, it is important to select a healthy, well-established tree that is at least twenty years old. The tree should be of a species known to support mistletoe. It is also important to consider the growth rate of the mistletoe, which can be moderate to slow. It may take several months for germination to occur, and fruiting may take four to six years.
Additionally, the care required for the host tree should be considered. The host tree will need extra care as the mistletoe will sap some of its energy. Apply fertiliser in the spring, watch for pest and disease problems, and keep the host tree watered.
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Mistletoe growth habits and maintenance
Mistletoe is a semi-parasitic plant that grows on host plants, such as apple, hawthorn, lime, poplar, conifers, eucalypts, and oak. It is often considered a pest because it saps the energy from its host plant, sometimes killing or seriously disfiguring trees. However, mistletoe is also an important source of food and shelter for many animals, including koalas, sugar gliders, possums, birds, and insects.
To grow mistletoe, you will need to find fresh berries from an existing plant and mash the seeds inside into the bark of a suitable host tree in late fall or early winter. Orchard apples are perfect for mistletoe growing. The seeds can also be squeezed out and rinsed before planting. Most species of mistletoe need light for germination, so it is important to place the seeds in a well-lit area with temperatures of at least 60°F (16°C). The mistletoe will need to be kept moist, and germination may take several months.
Once the seeds have germinated, they will send out a root-like structure called a haustorium, which attaches to the branches of the host plant and absorbs its nutrients and moisture. The mistletoe will then start to develop into a ball shape. It is important to prune back mistletoe balls regularly to ensure they do not become too heavy for the branches of the host tree.
Mistletoe has a slow growth rate, and it may take four to six years for the plant to fruit. During this time, it is important to give the host plant some extra care, such as applying fertilizer in the spring and keeping it well-watered. Mistletoe is not prone to damage from insects or disease, but it can become a nuisance in areas where land has been widely cleared. To remove mistletoe, you can prune the branch behind the point of attachment.
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Mistletoe's benefits and drawbacks
Mistletoe is a semi-parasitic plant, meaning it relies on its host plant for water and structural support. It is not considered invasive, but it can take over and become a nuisance. The plant is dioecious, meaning each is either male or female, and it can take up to four years to identify which you have. The male plant produces flowers but no berries.
Benefits
Mistletoe has been used for centuries in traditional medicine, particularly in Europe, for a variety of conditions, including seizures, headaches, and menopause symptoms. It is also promoted as a complementary treatment for cancer, with some studies indicating that it may improve survival rates and quality of life for cancer patients. However, it should be noted that many of these studies have been performed on animals or in labs, and more human trials are needed. Mistletoe may also have antioxidant properties and could help prevent high blood pressure and improve cardiovascular health. It has also been used to help balance blood sugar levels, although results from these studies are conflicting.
Drawbacks
American mistletoe is considered toxic and embryotoxic, and it may cause spontaneous abortion. European mistletoe, on the other hand, is not poisonous but can become toxic if consumed in large quantities. It is also considered unsafe for pregnant women. The plant can also be harmful to the host plant, taking its nutrients and moisture, so caution is advised when choosing a host plant.
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Frequently asked questions
Find berries from an existing plant and carefully mash them into the bark of a suitable tree in late fall or early winter. The tree needs to be well-established and healthy, and should be at least twenty years old. Orchard apples are perfect for mistletoe growing.
Mistletoe is semi-parasitic and has chlorophyll in its leaves, allowing it to manufacture its own food. It requires a host tree to provide it with water and support, acting as a root system. It grows in loose, twiggy balls and absorbs nutrients and moisture from the host plant.
Mistletoe is toxic to people and can be harmful to pets if they consume large quantities of berries. It has a slow growth rate, and it may take four years to know if you have a male or female plant. The care of mistletoe is minimal, but extra care should be given to the host plant as mistletoe saps its energy.
