The average sea surface temperature in April 2017 for Cancun was 84.0Â°F. The maximum and minimum values were 83.0Â°F and 85.4Â°F respectively.
Boston ferns have become a plant of choice for savvy shade-loving gardeners. This fern will consistently give stunning results with minimal effort, no dead â heading and a calming resting place for the eye to settle.oston ferns have become a plant of choice for savvy shade-loving gardeners. This fern will consistently give stunning results with minimal effort, no dead â heading and a calming resting place for the eye to settle.
Mark Winwood/Taxi/Getty Images. The Boston fern is only most well-known of the nephrolepis ferns, but all of them share certain desirable traits. They are relatively tough ferns, with a higher tolerance for light than other species. And they are typically attractive, with long, graceful fronds bedecked with tiny leaves.arieties: There are actually two species of nephrolepis found in cultivation: N. cordifolia and N. exaltata. N. cordifolia features erect fronds up to two feet long. N. exaltata is the more common. Varieties include: 1  N. exaltata. 2  Known as the sword fern, this plant has stiff, upright fronds up to three feet.