Charles Adams & Katherine Bamford 
Principles of Horticulture: Level 2 [PDF ebook] 

This colourful guide will introduce you to the fundamentals of horticulture, whether you are taking a Level 2 RHS, City and Guilds or BTEC course, are a keen amateur or seasoned gardener. Written in a clear and accessible style, this book covers the principles that underpin growing plants for the garden and allotment; with reference to how these are tackled by professionals. With highlighted definitions, key points, and illustrated in full colour, this book will be a useful companion as you progress in the study and practice of horticulture.