In this publicity photo provided by Cool Springs Press, Minnesota author and 

In this publicity photo provided by Cool Springs Press, Minnesota author and gardener, Joel Karsten, picks tomatoes from his straw bale garden. Karsten is the leading evangelist of a straw-bale gardening movement that has become one of this summer's hottest gardening trends. (AP Photo/Cool Springs Press, Tracy Walsh/Poser Design)
Associated Press
In this publicity photo provided by Cool Springs Press, Minnesota author and gardener, Joel Karsten, picks tomatoes from his straw bale garden. Karsten is the leading evangelist of a straw-bale gardening movement that has become one of this summer's hottest gardening trends. (AP Photo/Cool Springs Press, Tracy Walsh/Poser Design)
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