Tulip tree ∗ The 10 best care tips and how to cut them correctly

Origin and Distribution

Under no circumstances should you confuse the Tulip tree with the sometimes also designated tulipmagnolia (Magnolia soulangeana). Although both species belong to the magnolia family (Magnoliaceae) and are therefore closely related to each other, they look only slightly alike.

The tulip tree (bot. Liriodendron tulipifera) in eastern North America, where it is widespread between the Great Lakes on the border with Canada over the Appalachians to northern Florida. The largest deciduous tree in North America thrives here, primarily on moist or occasionally flooded soils in floodplains and valleys.

In addition to the American subspecies, there is another representative of the tulip trees (Liriodendron) in China and Vietnam, the Chinese tulip tree (Liriodendron chinense). Incidentally, tulip and closely related magnolia trees can be grown for a period of at least 100 Millions of years ago, with both species in earlier geological ages also on other parts of the world - for example in Europe - thrived.

The tulip tree came to Europe from North America very early: as early as the 17th century. In the 19th century, the first specimens were planted in German and other Central European parks, where some of them can still be admired today.

use

Since the wild species of the tulip tree reaches enormous heights, it should only be planted in large gardens or parks. Here it is particularly suitable for a stand-alone position, but also looks interesting and imposing in parks as a group or avenue planting. Meanwhile, there are some much smaller cultivars like that for the home garden two varieties 'Fastigiatum' (15 to 18 meters tall) and 'Aureomarginata' (12 to 15 meters Height). Since these variants have also been refined, they bloom a few years earlier than the wild form - this often only develops its fascinating blossoms at the age of 20 and over.

In the USA and Canada, the tulip tree is one of the most important useful trees, its light-colored, finely grained wood - which is not without reason also referred to as "whitewood" becomes - is used in furniture production and becomes doors and window frames, veneers and cladding, but also toys, musical instruments and coffins processed. Furthermore, the tulip tree is a valuable raw material in pulp and paper production.

In the garden, the blooming tulip tree serves as a valuable, extremely nectar-rich Bee pasture.

Appearance and stature

At 41 meters high, one of the largest (and at around 450 years probably also the oldest) tulip tree in America is located in New York City in the borough of Queens. He is nicknamed "Queens Giant", although there are some other impressive representatives of his genus around the world. One of them is located in the botanical garden of the city of Marburg and is also almost 40 meters high.

Tulip trees grow very quickly at around 30 to 70 centimeters per year, with the pyramidal crown also increasing by around 20 centimeters each year. Although this remains quite narrow, it can still be between 15 and 20 meters wide for 25 to 35 meter high specimens. The main branches show a steep upward growth. The trunk grows very straight upwards, with a maximum diameter of 150 centimeters it looks rather slim and thickens strongly near the ground, which means that the species, which often grows in floodplain areas, is more stable receives. The longitudinally cracked, light gray bark is also characteristic.

leaves

The tulip tree is a deciduous, deciduous tree whose fresh green, alternating leaves turn bright golden yellow in autumn. The shape of the leaves is unmistakable, which is why the tulip trees can easily be identified by the knowledgeable: They are divided into four pointed, protruding side lobes. In addition, the leaves are quite large: the actual foliage leaf is up to 15 centimeters long and up to 20 centimeters wide, whereby the shape is almost rectangular. There is also a petiole about ten centimeters long.

Flowering and flowering period

Depending on the location and the weather, tulip trees open their unique flowers between April and May or May and June. The bisexual yellow-orange flowers are reminiscent of tulip blossoms in their shape, are initially cup-shaped, later bell-shaped. Up to five centimeters long, thick and fleshy stamens protrude from the center of the flower. The flowers of the tulip tree are very rich in nectar and are therefore popular with bees, Bumblebees and other insects.

Unless it is a tulip tree that has been propagated through grafting, you have to wait a long time on the first one Wait for flowering: Specimens grown from seeds, in particular, wait at least 15 to 20 years before the first Flowers.

fruit

After pollination, the tulip tree develops up to seven centimeters long, spindle-like fruits that are vaguely reminiscent of coniferous cones. They are winged and contain approx. one or two seeds.

Toxicity

All parts of the tulip tree are considered to be slightly toxic to both humans and animals. Both leaves and flowers are therefore unsuitable for consumption. Bark and wood, in which the alkaloid glaucin can be found, have a particularly high proportion of toxins. The sap, in turn, can cause allergic reactions on contact, for example by pruning.

Which location is suitable?

The tulip tree feels most comfortable in a location that is fully sunny and sheltered from the wind. This is particularly important because older specimens in particular have a tendency to wind breakage. Also in Penumbra the tree grows, but much more slowly there. In addition, the tulip tree will not grow as big in a darker place in the garden.
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floor

The optimal substrate for the tulip tree is:

• nutrient-rich and humic
• loose and permeable
• as loamy as possible
• fresh to moist
• acidic to slightly alkaline

Basically, the species also thrives on sandy, dry soils, but in this case it grows much more slowly. On the other hand, the floor should definitely be free of lime.

Pot culture

A permanent pot culture is not recommended due to the rapid growth and the expected size. The species is also unsuitable as a bonsai.

Plant the tulip tree correctly

Plant the tulip tree in its intended location as follows:

• Place the sapling in a bucket of water so that the roots can soak themselves up.
• Dig a planting hole that is about twice as large and as wide as the root system.
• Loosen the soil slightly on the side walls and on the perforated base.
• Sludge the planting hole well.
• Mix the excavated material with compost and Horn shavings,(€ 32.93 at Amazon *) if too lean / sandy.
• Plant the tree, but not too deep.
• Fill in the soil, gently tread it down.
• Water the tree.
• Spread a layer of bark mulch or leaf compost.

In the following weeks you should water the freshly transplanted tree more.

What is the best time to plant?

Basically, you can plant the tulip tree in the garden at any time between October and March, provided the weather is mild and the ground is frost-free. However, since the species has very sensitive roots that can be damaged by planting in autumn or winter spring is recommended as the ideal planting time - as late as possible and in any case after the Ice Saints.

The correct planting distance

Planting in a single position is ideal. You should keep a minimum distance of five meters (better more) to other trees.

Underplants

As a heart root, you can safely plant the tulip tree with ground cover as well as with small ornamental shrubs or shrubs. -plant perennials, provided that they can withstand strong root pressure and naturally require little water and nutrients. On the other hand, the underplanting has the advantage that it practically acts like a water reservoir and prevents the soil from drying out. With age, Liriodendron tulipifera forms a hemispherical root foundation that rises and the tree from the earth and thus ensures more stability. At this point, of course, underplanting is no longer possible, but until then it will take several decades to centuries.

Spring memorials (Omphalodes verna), for example, are well suited for underplanting. Holy herb (Santolina chamaecyparissus), Japanese forest grass (Hakonechloa macra), King's beak (Geranium magnificum), Goldfelberich (Lysimachia punctata) or lady's mantle (Alchemilla mollis). Since tulip trees have a rather slender growth and develop a narrow crown, the space under the wood is often very light.

Watering the tulip tree

Freshly planted tulip trees should be watered regularly to make them easier to grow. But even with older specimens, timely watering is important if the drought continues, as the trees shed their leaves quickly when there is a lack of water. However, the tulip tree can usually cope with a short-term lack of water. Incidentally, the splendid autumn color is only developed when there is sufficient water supply, which is why you should still use the watering can in late summer if necessary. The tulip tree has a high water requirement, but - like most plants - does not tolerate waterlogging. Permanently wet floors should therefore be avoided if possible.

Fertilize the tulip tree properly

In spring and again in early summer, you should plant the tulip tree with plenty of ripe compost and a generous handful Horn shavings(€ 32.93 at Amazon *) supply. The species also receives fertilization very well Rhododendron fertilizerthat acidifies the soil and kills two birds with one stone: the heavily draining one The tulip tree receives the nutrients it needs, while at the same time providing an acidic feel-good environment will. In principle, fertilization is only carried out between April and July, after which the nutrient application must be stopped. The reason for this is that the new shoots have to mature in good time before winter and no more are more stimulated to grow - these remain too soft and would be in frosty temperatures freeze away.
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Cut the tulip tree correctly

Like the magnolias, the tulip tree does not tolerate regular pruning, which is why it is better not to use scissors to attack it. In addition, any training or correction incisions are not necessary, the species develops an appealing crown structure on its own. Only young trees can still be corrected in their growth by pruning, whereas older trees can no longer be corrected. It also makes sense to remove dead or diseased material, which you should do in early spring if possible.
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Propagate tulip tree

Typically, tulip trees are propagated by seeds or, in the case of cultivated forms, by grafting to the wild form. But you can also in spring Cut cuttings and use them to grow new trees. This is how cuttings propagate:

• In April or May, cut head cuttings about four to six inches.
• If necessary, remove leaves except for two leaves.
• Cut large leaves in half.
• Slightly cut surface bevel, in Rooting powder dive.
• Cuttings now in a small pot with Growing substrate(€ 12.99 at Amazon *) put.
• Pour well with lime-free water.
• Cover the pot with a cut-off PET bottle or foil.
• Place light and warm at 20 to 26 ° C, water and ventilate regularly.

Be patient with your young cuttings: they usually take a long time to develop their own roots. As long as the cutting looks healthy and the earth does not go moldy, everything is good and you don’t need to throw in the towel yet.
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How do I transplant properly?

If tulip trees have been in their location for a number of years and are well established there, they should not be moved if possible. The trees do not tolerate transplanting very well because their extensive and sensitive root network is inevitably damaged. In any case, large specimens can only be removed with heavy equipment, which is associated with considerable effort and high costs.

On the other hand, you can transplant young tulip trees that have been in place for a maximum of three or four years and have not yet grown too high in a relatively uncomplicated way. But here too, this measure needs to be well prepared by digging a spade-deep trench around the tree in the fall and filling it with compost. As a result, the roots develop more compactly until the following spring, so that the loss is not too drastic. Move the tree in late spring and be sure to prune it back so that the balance between the aboveground and subterranean plant matter is preserved.
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Diseases and pests

Diseases and pests rarely occur in the tulip tree - as in all magnolia plants. The only problem that can be problematic is keeping it too wet, which manifests itself as rot after a while. To prevent this, pay attention to a species-appropriate location, a loose and good one Permeable subsoil, in which you can install a drainage if necessary, as well as an adequate one Plant spacing.

Sometimes the tulip tree develops brown leaf spots, which can have various causes. They often indicate a lack of water, but can also be traced back to a too salty soil - for example as a result of overfertilization. A rare but not impossible reason is one Leaf spot diseasewhich can usually be dealt with easily with a copper sulphate solution.

Overwinter

Since the tulip tree is sufficiently hardy and frost hardy here, too, special wintering measures are not necessary. Only young trees can be given a light protection if it gets very cold.

Species and varieties

The genus of the tulip trees (Liriodendron) comprises only two species, both of which can be cultivated as ornamental trees in the home garden. While the American tulip tree in its original form (Liriodendron tulipifera) is only suitable for very large gardens due to its size or parks, the Chinese tulip tree remains with a maximum height of up to 17 to 20 meters in the Central European climate smaller. The Asian variant is also hardy here, but branches and twigs can freeze back in strong frost.

In addition, there are two cultivars of the American tulip tree that remain significantly smaller than the wild form:

• Column tulip tree 'Fastigiatum': Growth height up to approx. 15 meters, very narrow growth
• 'Aureomarginata': fresh green leaves with a yellow-green margin, about 12 to 15 meters high