roasting new mexico green chilies

I lived in New Mexico for 6 years, and the Hatch green chilies have a special place in my heart.  In September, you can smell roasting chilies all over Santa Fe and the grocery stores are piled ceiling-high with 20lb burlap bags.  This summer I grew three plants in black plastic nursery pots on my  driveway.  The concentrated heat was the only way the Oregon summer was hot enough for them.  (I first had them in the bed, and they barely grew until I transplanted them to the pots).  One of the three mysteriously did not produce anything.