✹ About Wednesday 1 April 1663 Nate Lockwood on 3 Apr 2016 • Link A "live oak" is one that is not seasonally deciduous; it has green leaves all year long. Where there are several species of oaks 'live oak' may be contrasted with "black oak" which are seasonally deciduous and, at least in Southern California, really do look black in the winter. In California live oaks are said to have year around access to water whereas black oaks may not and consequently drop their leaves in the colder, dry, early winter. Quercus agrifolia leaves are small and stiff, which are adaptations to our hot dry summers and fall. Live oaks can grow at any time of year so have the potential of growing larger than their cousins.