Grown by Timeless Foods in Montana. 
 
I can’t say enough good things about them. I learned about them through reading the Lentil Underground when it came out in 2016. Timeless Foods has been doing for decades in the Great Plains what we aspire to do in the valleys of the Green Mountains. I highly recommend the book. 
 
From their website:
Petite Crimson Lentils are petite, delicate, quick cooking, and slightly sweet to the taste. Thought to have originated in Turkey, they have been the foundation of Near Eastern cuisine ever since.
The biblical story of Jacob and his brother Esau, revolves around the bartering of Esau’s birthright as oldest son for a simple bowl of lentil stew (Genesis 29-34). It was described as a “red stew” and is assumed to be a thick soup made of red lentils. 
Great for Indian masoor dal recipes, pureed soups, and ready-in-minutes side dishes. Blend them in as a colorful and healthy addition to cooked rice, or add them to pasta sauce for a meatless Italian meal.
Petite Crimsons cook in 5 to 10 minutes, transforming into golden pearls when completely done.