Sunflowers in full bloom on the 2014 swale August 13, 2014 3264 × 2448 Some August updates Sunflowers in full bloom on the 2014 swale Sunflowers in full bloom on the 2014 swale. The sunflowers are part of the cover crop for the permaculture swale. They should reseed themselves for next year. These are black oil sunflowers.