Learn all about how air temperature affects plants in our CANNA Research article. The Grow It Yourself chapter is all about leeks. Genetics and Breeding tells you about genotype and phenotype. Roller derby is featured in What’s Happening! Pests and Diseases is all about atmospheric contaminants. Don and Nicky will take you on a lesson in tomato love. And our Grower’s Tip explores temperature in the grow room.