Oak is a common symbol of strength and endurance and has been selected as a national tree in many countries. The wood is very resistant to insects and fungal infections due to its high tannin content and plays a key role in biodiversity
Gall nuts from oaks are a rich source of naturally clear tannin.
Oak bark is used for plant dyeing and you can use them as a dye without having to fix the color due to the tannin content.
Oak leaves can be used for botanical prints.
