Symbolique:
Back in the days of the druids, the oak was known as a "Sacred Tree".Today, the oak symbolises the power of life, authority (oak leaves decorate the insignia of our military marshals), and justice

Practical tips:
If you wish to keep your oak tree in a pot for several years, place it in a deep, wide pot that will allow its central root to develop.
When eventually choosing its spot out in the garden, take into consideration the height it will grow to.
Dig a deep hole and loosen the earth, which must be fine and well drained.