This henna can also be used for dyeing yarn and hair, as well as for making tattoos. Henna will give you browns, orange/red on hair.
A little info on Henna from Wikipedia:
Henna (Arabic: حِنَّاء) is a dye prepared from the plant Lawsonia inermis, also known as hina, the henna tree, the mignonette tree, and the Egyptian privet, the sole species of the Lawsonia genus.
Henna can also refer to the temporary body art (staining) based on those dyes (see also mehndi). Henna has been used since antiquity to dye skin, hair and fingernails, as well as fabrics including silk, wool and leather. Historically, henna was originally used in Egypt and then the Arabian Peninsula, Indian Subcontinent, parts of Southeast Asia, Carthage, other parts of North Africa and the Horn of Africa. The name is used in other skin and hair dyes, such as black henna and neutral henna, neither of which is derived from the henna plant.
100g dye, diluted in cold water.
Bring pot with dye to simmer For 1h.
Strain through cloth, add yarn/fibre and dye bag to dye bath for 1h.