Black Oil Sunflower Seeds Now Available at Martie’s in Elk River and Monticello! If you're looking for the best way to attract a variety of birds to your yard, black oil sunflower seeds are a must-have! At Martie’s in Elk River and Monticello, we’ve got you covered with premium quality black oil sunflower seeds—perfect for keeping your feathered friends happy and healthy. Why Choose Black Oil Sunflower Seeds? [caption id="attachment_14739"…