This book features a section describing the history and folklore of various plants, then moves on to descriptions and activities involving several common fruits and vegetables that you can find at your local grocery store.  The final section includes many different science experiments involving plants. 

I found this book at a used book sale and brought it home for my oldest son as he wants to plant his own garden this year.  So far, we've learned that Julius Caesar brought apples to Britain during the Roman invasion, that you can sprout a pineapple by cutting off and drying the top and discovered several experiments that we can carry out this spring and summer. 

I think that this book would make an excellent resource for a summer or semester long study focussed on plants and gardening.  With both history and science components, it is an unexpectedly well-rounded resource.