Java Fern and
Does Java fern need to be fully submerged?
As java fern microsorum is an aquatic plant which can grow fully submerged in planted aquarium, it's safe to say that it loves humidity! This holds true whether it's fully or partially submerged, and its root system and rhizome should be in contact with water constantly for best growth.
Can ferns grow submerged in water?
Bog plants such as Amazon swords, crypts, and Java fern will survive submerged, although they will do better if allowed to send leaves up out of the water. ... These plants need the foliage out of the water. The roots of land plants for aquariums can be submerged but not the foliage.
