Oaks Archive

DocKalle Oak species

6.7.2025: More oak species in the store on Ebay

Many other oak species can currently be found in our Ebay store:

https://www.ebay.de/str/klimasamen

Quercus wislizeni.
Quercus wislizeni is native to many areas of California and southwards to Baja California in Mexico.

Quercus arkansana: This oak species occurs in a few locations in the south-east of the USA.
It is considered endangered.

Quercus polymorpha:
The Mexican white oak is native to the state of Texas in the USA and is also found in Mexico.

Quercus shumardii
Quercus shumardii is one of the largest oak species in the red oak group. It is closely related to Quercus Buckleyi, Quercus Texana and Quercus Gravesii.

Quercus castaneifolia:
The distribution area is in Iran and Azerbaijan.
The species is thermophilic and mostly frost-hardy

Quercus eduardi:
Quercus eduardi grows in only a few regions in Mexico at altitudes above 2200 meters.

Qurcus infectoria veneris:
This species originates from the eastern Mediterranean region and western Asia. The tree only grows about 6 meters high.
Not frost-tolerant!

Quercus agrifolia:
The species is native to California. The species grows west of the Sierra Nevada from Mendocino County in the north southwards to the Mexican state of Baja California.

Quercus libani:
The Lebanon oak is native to Syria and Asia Minor

Quercus lyrata: The distribution area is in the northeast and southeast of the USA.

Quercus wislizeni:
Quercus wislizeni is native to many areas of California and south to Baja California in Mexico.

Quercus hintonionum
Originally found only in the Mexican states of Coahuila and Nuevo León.

Acorns City climate suitable Climate Warming Resistant Oaks

DocKalle Acorns from the USA, Acorns southern states

25.2.2025: Various acorns from the south of the USA for sale

It took a long time and a lot of negotiations, but now they are here. Various acorns (oak species) from the south of the USA.
E.g. from North and South Carolina, Georgia, Alabama, Mississippi, Louisiana, Arkansas, Tennessee and Kentucky.
Most of the oak species sold here for the first time are resistant to global warming.

The species can be found here in the store: https://quercus.guru/shop/.

What would we have there?

Different types

Well, for example Quercus michauxi. This species grows up to 30 meters high. This species is rarely used commercially. It occurs from Indiana and Illinois to Texas and Floria.

Quercus virginiana (Virginia oak or live oak): This species is almost evergreen. It is also found in Mexico and grows up to 35 (!) meters tall. The live oak is the symbol of the state of Georgia.

Quercus texana is considered a fast-growing oak. It likes nutrient-rich soils and is very hardy (good street tree). It grows frequently in Mississippi, Alabama, Tennessee and Texas.

Quercus velutina can grow up to 40 meters high. It is often found in Georgia, South and North Carolina and frequently grows on dry slopes.

Quercus hemispherica belongs to the red oak sector of oaks. It is also found in Mexico and loves sandy locations.

Quercus laurifolia grows from Texas to Florida and Virgina. It is robust and can withstand temperatures of over 40 and -26 degrees.

Quercus polymorpha is also found in Mexico, Guatemala and Honduras. The Mexican white oak is native to the state of Texas in the USA and is correspondingly resistant to heat and drought. It usually develops into a fairly small tree here. It is also known as the Monterey Oak.

Quercus shumardii is one of the largest oaks in the red oak group. The tree grows to a height of over 20m. The location should be sunny and the soil moist, loose, well-drained and rather acidic. It is considered to be very drought-resistant.

Quercus lyrata x Quercus nigra is also known as “Compton oak”.

Some acorns are not quite cheap. However, we currently have a voucher promotion for purchases of 50 euros or more. Please enter “klimaschutz” to receive the discount.

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

DocKalle Discount

From 50 Euro purchase 20% discount

20% Cart discount

Klimaschutz

Expired

i

Ab 50 Euro Einkauf 20 % Rabatt

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

DocKalle Discount, Discount

Current: 20% discount on all items

20% Cart discount

Klima24

Expired

i

20% discount on all products

Here: https://quercus.guru/shop/

Acorns City climate suitable Climate Warming Resistant Oaks Unkategorisiert

DocKalle Acorns, Oaks

6.11. 2024: Neu in unserem Shop

New in our store:
Quercus georgiana
Quercus alnifolia
Quercus infectoria subsp. veneris
Quercus senescens
Quercus mexicana x grahamii
Quercus acutissima
Quercus coccifera subs. calliprinos

https://quercus.guru/shop/

Acorns Oaks

DocKalle Facebook, Oaklovers, Quercus international

12.10.2024: New Facebook group “Oaklovers – Quercus international”

Oaklovers – Quercus international. There is a new group on Facebook – “Oaklovers – Quercus international”. You can join here:

https://www.facebook.com/groups/518874377741330

Hobby and exchange in Oaklovers – Quercus international

Growing oak trees is a wonderful hobby. It decelerates, it calms, it grounds. And it helps us humans to create something meaningful, to realize that we can be a productive part of the whole. And of course, even if it is actually a classic “solitary hobby”, it makes sense to talk about the specimens of the genus “Quercus” from time to time. After all, there are around 600 Quercus species.

An exchange is now possible on Facebook (see above). Which species could this be? What general conditions need to be considered for different species? Where can you get good seed? Who might swap acorns? Which species can be discovered in which botanical garden? There is a lot to discuss.

Quercus-related species from the beech family (Fagacea) can also be discussed. By the way, from time to time small acorn shipments are raffled off among the members of the group. So it makes sense to actively participate in the group.

Oaklovers - Quercus international — Oaklovers – Quercus international

Of course you will also find dates here, e.g. dates for https://www.internationaloaksociety.org/. Or also information on special oak species for sale, e.g. here: https://quercus.guru/shop/.

Small competitions are also held from time to time: e.g. “Who sends the ‘most beautiful’ oak photo?”, or: “Who knows a particularly spectacular oak species?” etc.

Meaningfulness

You can also explain your motivations there. Why do you grow oak trees? What significance does it have for you? Do you want to do something for nature conservation or climate protection? What is the core of your enthusiasm for oaks?

Acorns Oaks Unkategorisiert

DocKalle Quercus hartwissiana

10.10.24: Quercus hartwissiana (Hartwiss oak)

Quercus hartwissiana (Hartwiss oak) is found in regions south and east of the Black Sea. It grows in south-eastern Bulgaria, Anatolia and Caucasia.

It is a deciduous tree that can grow up to 35 meters high.

More info: https://en.wikipedia.org/wiki/Quercus_hartwissiana

In the store: https://quercus.guru/produkt/quercus-hartwissiana/

Acorns Climate Warming Resistant Oaks Unkategorisiert

DocKalle Acorns

10.10.2024: First acorns of the new season are expected

The first acorns of the 2024 season are expected shortly from arboretums/collectors in France and Bulgaria. please subscribe to the newsletter for more information: https://quercus.guru/newsletter/.

Dear people,

The time for acorn deliveries in 2024 is beginning very slowly.

Came in today: Quercus hartwissiana.

Expected in the next 3 weeks:
Quercus acerifolia
Quercus crassipes
Quercus eduardi
Quercus aff. galeanensis
Quercus x heterophylla
Quercus hirtifolia
Quercus mexicana

Many more species will follow in late fall/winter
Among them will (hopefully) be some real surprises, really great and rare acorns.
In addition, many species from Southern Europe and North Africa.
e.g.
Quercus canariensis
Quercus infectoria subsp. veneris
Quercus alnifolia
Quercus ithaburensis

From around January/February 2025, for example, from the USA

Quercus kelloggii
Quercus wislizeni
Quercus chrysolepi
Quercus tomentella

Quercus macrocarpa (big)

Hopefully too:
Quercus buckleyii
Quercus comptonae
Quercus falcata
Quercus hemisphaerica
Quercus imbricaria
Quercus laurifolia
Quercus laevis
Quercus lyrata
Quercus margaretta
Quercus marilandica
Quercus muehlenbergii
Quercus nuttallii
Quercus obtusa
Quercus polymorha
Quercus prinus
Quercus prinoides
Quercus shumardii
Quercus stellata
Quercus texana
Quercus velutina
Quercus virginiana
Quercus virginiana fusiformis

…and perhaps a few more surprises (acorns).

Take a look at our store soon: https://quercus.guru/shop/

Planting oak trees is a wonderful hobby. It’s a joy to see the little acorns sprout, to accompany the tender little plants, to nurture and care for them. One day they will grow up and grow old. They will outlive us and we will be able to leave something meaningful to the world.

Several oak species can live for well over 500 years, they provide food for many wild animals, they cool the environment, they can contribute to combating global warming. They provide life and can accompany us for a lifetime.

There is a lot to consider. The quality of the seed, the soil, the method of planting, liming, acidification, protection against too much water (or too little). It is a wonderful task to create and do something for the environment.

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

DocKalle Tree species resistant to global warming

Growing tree species resistant to global warming

Tree species resistant to global warming

A wonderful hobby: growing tree species that are resistant to global warming. It’s fun, it calms you down, you have the feeling of “doing something”, of making a small contribution to resilience. One thing is certain: native species are extremely important for supporting biodiversity. Unfortunately, it is also fairly certain that many native species will have a hard time in 30 or 40 years, as we need species that are adapted to the heat.

Whenever there is a bit of time, we indulge in this lovely hobby in the evenings and repot seedlings grown from seed. Many, many tree seedlings have made it, and climate warming-resistant tree species are now growing. Many oak species (including native species such as Quercus petraea, the sessile oak) but also several species from global “hot zones”. Quercus douglasii, for example (the blue oak from California), or Quercus faginea (the Portuguese oak). Tree species that are resistant to global warming will also be of great service to us here, even if they are still unfamiliar.

And a classic “secret weapon”. Castanea sativa, the sweet chestnut. It can cope with extreme heat and drought and has already made itself at home in southern Germany. Available here in our store, for example.

Many plant species are protected with sheep’s wool. This retains moisture for a very long time. Even tree species that are resistant to global warming initially require strong protection. Clay balls and vermiculite (a layered silicate used to loosen the soil and store moisture) are used for this purpose. The joy is particularly great when initially weak seedlings gain a big boost due to a change in the soil. Clay balls and vermiculite, for example, ensure that the soil becomes more permeable to oxygen (here is an interesting article on vermiculite: https://vermiculite.de/anwendungen/vermiculite-pflanzenzucht/gemueseanbau-und-blumenzucht/, coffee powder and goat manure, for example, provide much-needed nutrients (depending on the tree species).

I’m really looking forward to it: In the fall and winter, lots of fresh seeds are coming in, from all over the world. Heat-resistant, hardy, drought-resistant, including many acorn and oak species.

Tree species resistant to global warming

Acorns City climate suitable Climate Warming Resistant Oaks Unkategorisiert

DocKalle Oak species from California

27.7.2024: Oak species from California

Acorns and oak species from California

The first species for this year have been selected. In winter 2024, oak species come from California (in the form of acorns). E.g. Quercus lobata (Californian white oak), Quercus x jolonensis and Quercus douglasii (blue oak). This year also: Quercus kellogii (California black oak), Quercus wislizeni and Quercus chrysolepis (canyon oak). After a long, long search I finally managed to find someone who sends acorns of Quercus tomentella from California, but only a very limited number (100 pieces). Oak species from California are special because they are very well adapted to a warming climate. Quercus tomentella is a rarity that is difficult to obtain (see https://en.wikipe dia.org/wiki/Quercus_tomentella). This species originally only occurs on the Channel Islands off California and on “Guadelaupe Island”. This species is highly endangered. It forms hybrids with Querrcus chrysolepis. Quercus tomentella is also known as the island oak. The acorns will probably arrive here at the end of February/March 2025. Quercus kellogii can reach heights of up to 35 meters.
It can be found as far as the border with Mexico.
It grows on slopes at altitudes between 300 and 2400 meters.
It prefers drier soils.