I don't think that "walking" through Fern Gully is too feasible, as it is one of the main roads that locals traverse to get from Ocho Rios to Spanish Town and other locations along the way. Traveling through Fern Gully can be a hair raising experience becuase of the narrow road; and most traverse via vehicle. Walking is not recommended. You may be able to find a few side spots to stop and explore the vegetation and plants, but not too many. The way the vehicles speed through can be pretty unnerving for the faint of heart. Nevertheless, with all of that being said, I am sure that if you engage a local along the way upon the road, you may find someone that can share some information on the vegetation that is found along Fern Gully.

Have good time in Ocho Rios! The round trip to Fren Gully will last about 20 minutes. A stop to look at local art( that is, if anyone is exhibiting) might add a few minutes. It is beautiful, but a very short tour. You might like to travel toward Montego Bay a few miles and visit the Seville Great House with quality museum exhibits. A few miles further is the Rose Hall Mansion where the story of the white witch is told.