The lifespan of a forsythia bush depends on several factors. They tend to live longer in climates where annual rainfall is higher and winter conditions are milder. However, the average forsythia bush will live between 20 and 50 years.
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Robin Lewis is a freelance artist, designer and writer. Her articles have appeared in newspapers, national magazines and on several self-help areas of the Web. Lewis specializes in gardening articles, publishing frequently on a variety of websites.