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.
Boston Fern The most common indoor fern, Boston ferns are long-lived plants that can reach more than 5 feet tall and wide at maturity (though indoors they rarely reach that size). Fern breeders have released a large number of varieties -- from selections with golden fronds to fantastically frilled fronds.
Foxtail Ferns are very similar to Sprenger's Asparagus except the growth habit is much denser. In the garden they will grow 2 ft. tall with a spread of 3 to 4 feet.sparagus Ferns are only hardy in USDA zone 9 and warmer. They all require the same basic care, whether they are grown in the garden or in containers, as house plants. They grow best in bright, indirect light without any full sun.