A good sized beginner greenhouse is one that is portable so you can easily set it up and take down during the off-season. A good size range is from 4 by 4 feet, to 4 by 7 feet, and it should be easily put up and taken down for an early season of growing.
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Nicoline Keavy has been writing for over 20 years. After Nicoline received her MBA at University of Washington, she has enjoyed a career of managing several online non profit organizations. Nicoline Keavy has been published in over 3000 publications over the last 20 years.