The sections of the light spectrum which the âredâ and âgreenâ cones perceive overlap and this is why red and green colour vision deficiencies are often known as red/green colour blindness and why people with red and green deficiencies see the world in a similar way.
Wood fern (Dryopteris) Plant these delicate, medium-sized ferns in mixed borders to show off their feathery fronds. Autumn ferns (D. erythrosora) are one of the few ferns with seasonal color variation and their fronds change from pale gold and pink in spring to green in summer and rusty copper in fall. The ferns spread by underground stems to form swaths in garden beds.
North American native ferns like Sword Fern (Polystichum munitum) and Deer Fern (Blechnum spicant) are fantastic evergreen options for mixed height, texture and beautiful year-round interest. The trick: prune them at just the right time, and it takes no time at all! Many gardeners claim to dislike ferns because they âlook messyâ or are âhard to pruneâ. The reality is many evergreen ferns have fronds (theyâre not called leaves on ferns) that last only a year or so. Then those older fronds die back and turn brown, but they remain woven among the newer growth.