Why do pine trees grow faster in summer than in winter?

Biochemistry, light, temperature and water describe why pine trees grow faster in summer than in winter. Reduced daylight, moisture, nutrients and temperature slow sunlit interactions down so that fewer sugars are made for such life-sustaining activities as photosynthesis and respiration in winter. Summer supports growth because of the abundant moisture, high-angled sun and warm temperatures activating enzymes while winter tends to be a time for pine trees to break down and remake proteins, maintain cell membranes and recycle magnesium, nitrogen and phosphates.