Climate Warming Resistant Archive

DocKalle Pyrenean Oak, Quercus pyrenaica

Quercus pyrenaica (Pyrenean oak)

Quercus pyrenaica (Pyrenean Oak) is found especially in western southern Europe. It is common in Spain and Portugal. They can also be seen regularly in western France and Morocco.

Although it is called “Pyrenean Oak” it is rarely found in the Pyrenees.

It often grows in shrub form, but can also reach heights of up to 20 meters.

The very large leaves (up to 15 cm long and 9 cm wide) are striking. The leaves have yellow-gray felt-like hairs on both sides.

Dryness she tolerates very well. It also feels quite comfortable on acidic soils. Lime likes them very much. It also accepts sandy soils. It is resistant to frost and also tolerates road salt. Their wind resistance is also good. Since it does not tolerate paving, it is conditionally suitable as an urban tree. However, their resistance to pollutants is quite good. In Central Europe they are always found in parks or arboretums. It also tolerates wetness.

The southern European flair that it exudes is impressive. People who love vacations in Portugal or Spain, appreciate this tree very much. It likes locations flooded with light.

This very beautiful species can be purchased in acorn form here: https://quercus.guru/produkt/quercus-pyrenaica-pyrenaeen-eiche/

Acorns Climate Warming Resistant

DocKalle Holm oak, Quercus ilex

Quercus ilex (holm oak)

Quercus ilex (holm oak) is an evergreen tree. It reaches a height of growth up to 20 meters. Maximum it can live up to 500 years.

The leaves are partly leathery and spiny. A little they remind of the leaves of holly.

In the Mediterranean region, the holm oak is a classic. It occurs from Portugal to Turkey, from Tunisia to Morocco. Due to climate warming, it is given good chances also in Central Europe. In Germany, it now occurs sporadically in the Rhine rift valley and in the Weser-Ems region. Occurrences are also known in California and in South America and even in Great Britain.

Very interesting: the acorns can be eaten raw or cooked. Something that otherwise (roasted) is known only from the bourbon oak. The taste can be sweetish but also somewhat bitter. Often the acorns are made into a coffee substitute or oil. Especially the acorn coffee is highly recommended! In the case of other oak species, bitter substances must first be flushed out by elaborate processes before they can become a flour substitute in parts.

The stone acorns are also often used for fattening pigs. The wood represents a very good firewood.

Important: Drought and high temperatures are not a problem for this species of oak (when grown tall). Young plants must necessarily be watered during drought. The plant tolerates short temperatures down to minus 15 degrees Celsius, but prolonged sub-zero temperatures severely damage the tree. The tree is wind tolerant. Quercus ilex likes loose, stony or gravelly soil with clay content. A high lime content is also interesting for this species.

Interestingly: Despite its occurrence in the Mediterranean region, the holm oak loves moisture and therefore likes to stand by ponds or watercourses. Since the holm oak is rather sensitive to exhaust fumes and smoke, it is unsuitable as an urban tree. Road salt, however, she tolerates quite well.

In Central Europe, the holm oak is classically grown as a potted plant, which can also move to warmer areas of the house.

You can buy this oak as an acorn here: https://quercus.guru/produkt/quercus-ilex-steineiche/

Acorns Climate Warming Resistant

DocKalle Mexico Oak, Quercus mexicana

Quercus mexicana (Mexico oak)

Quercus mexicana (Mexico Oak) is (unsurprisingly) native to Mexico. It is widely used there. This species of oak grows up to 20 meters high.

Their wood is used for ship masts or barrels.

Quercus mexicana likes dry soils and can tolerate temperatures as low as -15 degrees.

The acorns can be purchased here: https://quercus.guru/produkt/quercus-mexicana-mexiko-eiche/

Acorns City climate suitable Climate Warming Resistant

DocKalle Pyrenean oak Karlsaue, Quercus x andegavensis

Quercus x andegavensis (Pyrenean Oak Karlsaue)

Quercus x andegavensis (Pyrenean Oak Karlsaue) is a cross between Quercus pyrenaica and Quercus robur. The variety “Karlsaue” comes from the Karlsaue Palace Park in Kassel.

It is considered to be moisture tolerant and (currently) suitable for urban climates. The tree can grow up to 30 meters high.

Some pictures: https://www.cardiffparks.org.uk/trees/roathpark-botanic/quercus-x-andegavensis.php

The acorns can be purchased here: https://quercus.guru/produkt/quercus-x-andegavensis/

Acorns Climate Warming Resistant Unkategorisiert

DocKalle Quercus hypoxantha

Quercus hypoxantha

Quercus hypoxantha is extremely rare. It is originally found in only three Mexican regions.

See: https://en.wikipedia.org/wiki/Quercus_hypoxantha.

Acorns are available for purchase here: https://quercus.guru/produkt/quercus-hypoxantha/.

Acorns Climate Warming Resistant

DocKalle Quercus eduardi

Quercus eduardi

Quercus eduardi occurs in a small area in Mexico. It grows there at an altitude between 2200 and 2600 meters above sea level.

It grows only up to 9 meters. The acorns have a size of up to one centimeter.

The acorns can be purchased here in the store: https://quercus.guru/produkt/quercus-eduardi/

Acorns City climate suitable Climate Warming Resistant

DocKalle Acorn case

Acorn case with special oak species

Acorn case – Rare and international oak species
The special gift for oak and tree lovers

With this acorn case you get a special (and above all rare!) Gift for tree lovers.
All acorns were collected (in different places in this world) in September and October 2023.
The acorns are currently stored in a cool, low-light place in a slightly moistened soil mixture.

In this case there are 5 acorns each from:
* Quercus acerifolia, maple-leaved oak (very rare). Home: Arkansas, USA
* Quercus petraea, sessile oak. Home: Central Europe

* Quercus saltillensis (very rare). Home country: Mexico
* Quercus illicifolia (scrub oak). Home: Northeastern USA.

* Quercus parvia (Santa Cruz Island Oak). Home: California, USA.
* Quercus heterophylla (Bartram’s oak). Home: Eastern USA

* Quercus cerris (wrench oak). Home: South of France
* Quercus depressa (Low Oak) (rare). Homeland: Mexico.

* Quercus robur (English oak). Home: Central Europe
* Quercus rubra (red oak). Home country: USA

Total quantity: 50 acorns.

Of course, the acorns are not added to the case “naked” but in small bags with a moistened earth mixture (to survive the transport well).

Attention: in order for different acorns to germinate next year, it is important to treat them appropriately.
Quercus acerifolia, Quercus illicifolia, Quercus heterophylla, Quercus cerris, Quercus robur and Quercus rubra should be stored in the refrigerator in a slightly moistened soil mixture for a few weeks, if possible (please keep checking to see if they germinate and then transplant directly).

Quercus petraea, Quercus saltillensis, Quercus parvia, Quercus depressa may start to germinate already this year (please store in soil mixture).

Please plant Quercus saltillensis, Quercus parvia and Quercus depressa protected from frost.

In the store you can buy the case with acorns.

Acorns Climate Warming Resistant

DocKalle Maple-leaved oak, Quercus acerifolia

Quercus acerifolia (Maple-leaved oak)

Quercus acerifolia is one of the very rare oak species and is critically endangered in its native Arkansas (USA). It belongs to the group of red oaks. The tree grows 5 to 10 meters high, rarely 15.

The leaves take on a fireplace red color in the fall, gorgeous to look at. It likes sunny exposed sites. Quercus acerifolia is hardy and at the same time climate warming resistant. It prefers dry and calcareous soils.

Available for purchase here: https://quercus.guru/produkt/quercus-acerifolia-ahornblaettrige-eiche/

Acorns Climate Warming Resistant Unkategorisiert

DocKalle Quercus parvula

Quercus parvula (Santa Cruz Island Oak)

Quercus parvula (Santa Cruz Island oak) is found primarily on the north slopes of Santa Cruz Island and in the California coastal mountains. It is considered an endemic California species and has year-round foliage. It does not tolerate waterlogging and is only partially sensitive to frost.

This species of oak can live up to 600 years.

Available for purchase from our store.

City climate suitable Climate Warming Resistant Other trees (except oaks) Unkategorisiert

DocKalle Oriental plane, Oriental plane tree, Platanus orientalis

Platanus orientalis (Oriental plane tree, Oriental plane tree)

Platanus orientalis is found especially in southern Europe (Sicily, Greece). In general, their range is huge. It is found in the Middle East, Central Asia and even in the Himalayan region.

It reaches growth heights of up to 30 meters and is often used as a street tree. The trunk can become so extensive that in the Middle East even rooms are built into it. The crown of the tree can become very sprawling.

The flowering period is in May. Pollination occurs through the wind.

Oriental plane trees can excellently cope with heat and drought. They do not tolerate waterlogging of any kind. Platanus orientalis likes full sun and is a classic light tree. It is considered sufficiently frost-hardy and can therefore thrive in Central Europe. Genrell it is also considered a very wind-resistant tree. See also: https://de.wikipedia.org/wiki/Morgenl%C3%A4ndische_Platane.

The wood of the oriental plane tree is considered to be vulnerable outdoors and is therefore more commonly used indoors.

Meanwhile, the Ortientplatane is increasingly used in non-native forests due to its climate resistance. The flaking bark provides shelter for many insects. It also protects other trees with its storm resistance. Due to its spreading branches, it provides shade for soils and prevents them from drying out.

It copes with almost all soils.

Probably the most famous Oriental plane tree is the “plane tree of Hippocrates” on the Greek island of Kos. According to legend, it was planted by Hippocrates himself. Later he taught his students under the tree. However, the plane tree should be “only” about 500 years old. It has been a natural monument since 1985.

For germination of seeds is recommended to first put them in a water bath for 24 hours. Then they go into a damp (not wet, not dripping) mixture of earth and sand. Optimal is to cool this 90 (!!) days, if necessary, they can be placed outside for a few nights (in frost). It is recommended to always check if they germinate. After the procedure: In the spring, put in plant pots and grow in a sunny place. However, be careful: young seedlings need slightly shady places in midsummer.

The seeds of the oriental plane tree can be bought here.