Walnut (Latin name: Juglans regia) 

Its still green peels are exclusively used for dyeing.
The browner the peels the weaker is the dyeing effect.

The pure walnut grows as a tree and is about 10 to 25 m high. The colour of its blooms is greenish. The ball-shaped or oval-shaped fruits have a smooth, green peel on the outside, and the walnuts are inside.

The walnut grows in Europe, Asia, North America, and even at a height of over 3,300 metres in Himalaya.

 Sea Buckthorn (Latin name: Hippophaë rhamnoides)

These orange-red to yellow berries contain plenty of ethereal oils.
Their leaves are only used for dyeing.

The summer green sea buckthorn grows like a bush and reaches a height of one to six metres. It has a deep and extended root system which extends from 1.5 to 3 metres into the depth and up to 12 metres in horizontal and/or diagonal direction.

Its distribution is focused on East and West Asia and Europe.

 Curcuma (Latin name: Curcuma longa)

Its cream or pink coloured blooms and the "root tubercles" (similar to a ginger root) containing the dye curcumin are harvested for colour production.

Curcuma is a cabbage like plant and grows up to one metre high. Strongly branched aromatic Roots are built developing tubercles at their ends. Its green, elliptic leaves are 20 to 45 cm long and have a stem.

The botanic home of curcuma is located in South Asia.

 Pure camomile (Latin name: Matricaria chamomilla)

The bloom heads which are rich in ethereal oils are taken for dyeing.

Pure camomile is a one-year, cabbage like plant reaching growth heights of up to 50 cm. The whole plant has a strong, characteristic camomile flavour. The stems are upright and have a lot of branches in the upper area. The leaves are 4 to 7 cm long, have two to three compound parts and a thorn tip.

The origin of the plant is in South and East Europe. Today it can be found all over Europe, North America, and even in Australia.

 Coffee (Latin name: Coffea canephora)

The dye is made from coffee cherries (which are roasted and fermented) and from its leaves.

The coffee plants belonging to the family of the Rubiaceae are available in many different sorts. They are evergreen, small trees or bushes with stems, and shiny leaves. The so-called coffee cherries which include two coffee beans each develop from the fragrant, hermaphroditic blooms.

All coffee sorts originally come from tropical Africa and Madagascar. Today, coffee is also cultivated in South America and Asia.

 Black Alder (Latin name: Frangula alnus)

Fruits and bark of the black alder (which is also called powder wood) are used as dye raw material.

Black alder grows as bush or small tree up to a height of six metres and can be 60 years old. The oval-shaped leaves mostly grow at the ends of the twigs. The berry-like stone fruits which are first green, then red and blue-black in ripe condition may have a poisoning effect when being eaten.

Black alder grows in Europe and Asia, and can now be found in North Africa and North America, too.