Saffron The North American Center for Saffron Research and Development, a new program at the University of Vermont, hopes to make New England the new hotspot for this ancient Mediterranean herb. Selling for $5,000 to $10,000 per pound, saffron is the most expensive culinary herb in the world, mainly because it is composed of the … Continue reading 5 of the Most Valuable Crops You Can Grow in the US & How to Grow Them