An acorn requires special conditions to be met ... pin oak, red oak, and bur oak trees need a chilling period before germination, so you can expect to see these seedlings emerge in the following ...

Bur Oak is the state tree of Iowa. It is a large deciduous tree ... The flowers are greenish-yellow catkins, produced in the spring. The acorns are very large, 2-5 cm (0.8-2 in) long and 2-4 ...