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This is usually only the case for oaks growing in open areas when mature long-lived dome headed trees can become wider than they are high. In comparison, woodland oak is tall and slender. The expected growth rate of the English oak is just over 0.5m per year. Growing to 6m after 10 years and 11m after 20 years. The female flowers are found near the end of each twig and are reddish-brown in colour. The male flowers hang down on bright green catkins.
Oak trees don't start blooming and producing acorns until they are around 20 years of age, according to the University of Tennessee Extension Service. As the tree continues to grow, they start producing even more flowers and acorns until they are about 80 years old. At that time, acorn production begins to diminish. Oak trees produce the most flowers and acorns between the ages of 50 and 80.