The first official day of spring is right around the corner, and among other things that means we're in the heart of flower and garden shows around the country.

This week, we speak with Sam Lemheney, Chief of Shows and Events for the Pennsylvania Horticultural Society, which annually hosts the famed Philadelphia Flower Show. The longest-running horticultural event in the country (not counting Spring herself), the Philadelphia Flower Show is a pilgrimage destination for many horticulturists and gardeners around the country.