Very technical, but very exact information that carefully explains the many ways both back-yard gardeners, farmers, and large laboratories bring forth the next generation of thousands of varieties of plants. Crops, flowers, house plants, and more are all covered making this a practical book for any gardener to own. LOTS of pictures which is helpful, but most are in black and white. In the cases of problems with your plants, this can be troublesome as color is usually a good way to diagnose the issues. Still, the information in this book makes it very worth it.