Jacob's Ladder (Polemonium caeruleum) HP/BB/BN
This plant is now rare in the wild but can be found in some numbers in the Peak District. It has beautiful cobalt-blue (or white) flowers and decorative, bright green foliage which looks like the steps of a ladder and remains fairly evergreen. It has long been a popular cottage garden plant as it is easy to grow in any spot with sun or light shade. Ht 1-3ft. Good for a low border or naturalised in short grassland.