Japanese umbrella fir ∗ The 10 best care and planting tips

Origin and Distribution

the Umbrella fir (bot. Sciadopitys verticillata) is the only member of the umbrella fir family (bot. Sciadopityaceae) and is distantly related to the various pine species - after all, botanists assign the species to the order of the pine-like (bot. Pinales) too. Millions of years ago there were probably other species of umbrella fir that also existed in Central Europe were widespread and made a significant contribution to the emergence of today's Brown coal made.

However, only the umbrella fir, which is native to southern Japan, is left of this. There the species grows in those of high Rainfall and high humidity marked cloud forests at altitudes mostly between 500 and 1000 meters. The very slowly growing trees can get very old and become quite powerful in their home with stature heights of up to 40 meters and trunk diameters of up to three meters.

Since the umbrella fir is also one of the five sacred trees in Japan, it is also often found in temple complexes. Nevertheless, the species is considered critically endangered - and is therefore on the International Red List endangered plants - because in afforestation and new plantings, faster-growing tree species for economic reasons to be favoured.

use

The wood of the umbrella fir is water-resistant - which is why it is traditionally used in Japan to build boats, houses and furniture. The typical Japanese hot tub, for example, has been made from umbrella fir wood for centuries.

In the home garden, however, the conspicuous conifer belongs in a prominent, solitary position where it can optimally develop its visual effect. The umbrella fir fits particularly well into Asian-style garden landscapes, where it protrudes, for example, between flat shrubs, grasses or bushes. In particular the Japanese maple, but also rhododendrons and azaleas or the Japanese Spindle bush harmonize wonderfully with the magical umbrella fir. Furthermore, she feels very comfortable in gravel or heather gardens, where her shape comes into its own. Smaller varieties such as the 'Green Ball' or 'Piccola' also thrive in larger planters without any problems.

Appearance and stature

The umbrella fir is an evergreen and very slowly growing conifer, which increases on average between 20 and 25 centimeters per year. Although the tree can grow up to 40 meters high in its Japanese homeland, even under favorable growing conditions in Central Europe it can reach heights of no more than ten to twelve meters. In most cases, however, the local specimens do not grow taller than about six meters. The densely conical crown is up to four meters wide at its widest point, but tapers towards the tip. The tree forms one or more trunks and is heavily branched, so that a dense overall picture is created. The smooth, reddish-brown bark peels off in older trees in thin, long strips.

leaves

At the ends of the horizontally protruding branches sit up to ten centimeters long, green, shiny, soft and fleshy needles. These are arranged like an open whisk or umbrella - the umbrella fir owes its German name to this striking arrangement. Scale-shaped, inconspicuous short needles also lie flat on the trunk.

Blossoms and flowering period

The umbrella fir belongs to the monoecious plants, i. H. there are both male and female flowers on a single tree. The male flowers appear a year before the female in a smaller shape, on the shoots tufts of balls located in appearance, the female, however, only between April and May of Following year.

fruit

The cones, which are typical of many conifers, are only formed very late in the umbrella fir - at the earliest in the up to eleven centimeters long and upright fruit shells are suitable for an age from 25 years see. These are still green in the first year, but gradually turn dark brown during the ripening process in the second year. Each individual cone can contain up to 150 flat seeds that are up to twelve millimeters long and winged.

Toxicity

The umbrella fir is not poisonous and can therefore be safely planted in gardens with playing children or pets.

Which location is suitable?

When it comes to the ideal location, the umbrella fir is quite demanding: it feels most comfortable the tree in a sunny to partially shaded place, which is neither hot nor too unprotected allowed. The wood, which is used to high humidity, can only tolerate heat and scorching sun if the soil is appropriately moist. Wind, on the other hand, should be avoided, as young specimens in particular are very sensitive to strong drafts. A bright, sheltered location - for example in a depression - is therefore perfect. However, avoid planting in front of a white south wall or wall, here the tree will quickly get too warm.

Soil / substrate

As in its natural habitat, the umbrella fir prefers a well-drained, yet moist, nutrient-rich soil in the garden. Ideally, this is sandy-humic, as heavy soils tend to waterlogging and growth in loamy soils is only very high takes place slowly - despite its high moisture requirement, the tree does not tolerate waterlogging and reacts to it Root rot. Also prolonged drought (for example during hot summer days) and calcareous soils Doesn't like the umbrella fir and reacts quickly to the right conditions with discolouring Needles. The soil must not dry out, especially in sunny locations.

The umbrella fir feels most comfortable anyway in a bog bed with ferns, azaleas and rhododendrons. Specimens cultivated in pots should therefore be in Rhododendron soil or placed in humus-containing potting soil.

Plant umbrella fir properly

The Japanese umbrella fir is available in stores either as a pot or as a bale product. Potted plants can be planted all year round, as long as the ground isn't frozen or it's not too hot (and therefore very dry) during the summer months. Both affect the healthy growth of the young trees. Bale goods, on the other hand, are best placed in the ground between October and April in mild weather. Make sure you plant enough space right from the start, as umbrella fir trees can get very tall with age - even if they grow slowly and therefore initially look like small bushes.

And this is how it is planted:

• select a suitable location
• Dig up the planting site deeply and loosen the soil
• if necessary, provide for soil improvement
• Upgrade the soil with sand, compost and / or bog soil, for example
• Dig the planting hole
• this should be twice as deep and wide as the root ball
• Place the tree with the root ball in a bucket of water
• Let the roots soak in moisture
• Hold the umbrella fir in the planting hole and fill in the soil
• Root ball should be level with the Garden soil to be or complete with this
• Press the earth lightly
• pour vigorously

Then the root area should be provided with a three to five centimeter thick layer of mulch so that the moisture stays in the soil longer.

How do I transplant properly?

Since the umbrella fir is one of the shallow-rooted species - and therefore does not develop a deep taproot - and also grows very slowly, it can still be implemented in later years. However, take such a measure preferably in the cool season and not necessarily during the hot summer months, so that the tree does not suffer from a lack of water. Carefully and generously dig up the rhizome so that as few roots as possible are damaged. Then make sure that there is an ample supply of water so that the umbrella fir can quickly grow in its new location.

Water the umbrella fir

Never let the soil dry out completely, especially in the weeks after planting or during the summer months. Make sure that there is an even water supply even for planted specimens, but avoid waterlogging at all costs. Since umbrella firs are sensitive to lime, use collected rainwater or filtered tap water if possible.

Fertilize umbrella fir properly

Regular fertilization is basically not necessary. However, if you have the impression that the umbrella fir looks dull, the needles may have turned yellow (and there are no other causes behind it), then you can take the tree with you Compost soil or a pine fertilizer. The best month for this measure is April, so that the plant can then grow vigorously.
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Cut the umbrella fir correctly

Since the umbrella fir naturally develops an even and dense cone-shaped growth, you should not disturb it by pruning. the Secateurs or saw can therefore remain in the shed.
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Propagate umbrella fir

Propagating the umbrella fir by hand is not that easy and also requires a lot of patience - after all, as already mentioned, it is a very slow-growing tree. You can choose between seed propagation and vegetative propagation using cuttings.

sowing

In order for you to be able to harvest ripe seeds from your own tree, it must be at least 25 years old - the umbrella fir will not bloom or produce fruit beforehand. However, you can buy germinable seeds in specialist shops and for them sowing use. In April, put the flat seeds in a with Growing substrate(€ 12.99 at Amazon *) filled box and cover it with a translucent lid. Keep the substrate slightly moist and be patient: germination begins after 100 to 120 days at the earliest - and afterwards The young plants usually have a height of only three to four centimeters in another two growing seasons achieved.

Cuttings

The production of new young plants via cuttings works a little faster, although the vegetative form of propagation is not always successful. To do this, cut about ten centimeters long, semi-ripe shoots in June or July and pull them all in one Cultivation box large under foil or other cover.

Overwinter

The umbrella fir is hardy in the right location and therefore does not need any additional protection. Only young trees react very sensitively to late frosts that occur in spring and should be protected against this with a thick layer of leaves and mulch.

Diseases and pests

Diseases and pests rarely occur in the umbrella fir. Only young trees are occasionally from Spider mites otherwise any abnormalities are usually due to location or maintenance errors.

What to do about yellow or brown needles?

If the needles turn yellow or brown, for example, there are always problems with the location or inadequate care. Many causes can be responsible for the discoloration of the needle:

• dryness
• strong sunlight (especially around noon)
• Lack of nutrients, often nitrogen
• Potassium deficiency is common on sandy soils
• Soil is chalky or loamy
• Over-fertilization (then the needles are often shed / baldness occurs)

Almost all causes can be resolved by moving the tree or fix a replacement of the potting soil. It will then recover and sprout green needles.

Species and varieties

There is only one type of umbrella fir, but there are now some established cultivars in front of it. However, these are significantly smaller than the actual species:

• 'Green sphere': spherical growth form with short needles, reaches a maximum height of 80 centimeters within ten years
• 'Piccola': pyramid-like growth, becomes a little higher after ten years at around 100 centimeters
• 'Koja-Maki': conical growth, reaches a height of up to three meters
• 'Shooting star': slender, but extremely slow growth, after 25 years only about 250 centimeters high