Sansevieria Masoniana

sansevieria masoniana

Image source: Mokkie / CC BY-SA

Sansevieria Masoniana exhibits strikingly different foliage than a typical snake plant. Their distinct wide leaves make these plants stand out from many other houseplants. They have a purple-banded basal sheath below the soil level.
It was initially known in the cultivation under the name ‘Mason Congo’. This plant is now categorized under the genus Dracaena from the Asparagaceae family.

Sansevieria Masoniana also has a variegated version

Also known as

  • Dracaena Masoniana
  • Whale Fin Snake Plant
  • Mason’s Congo
  • Sansevieria Masoniana Chahin
  • Whale’s Fin
  • Shark’s Fin

At a glance



This species is native to Africa. Originally found in the Democratic Republic of Congo by Maurice Mason, a renowned plant collector from England.


Bright green, broad, leathery and upright leaves grow 1-2 per shoot. They are smudged with pale green spots. Margins of the leaves are fibrous, wavy, reddish brown to purple in color.


Usual maximum height of the plant is 3-4 feet. In rare cases, it can grow 6 feet tall. Leaves are 4-7 inches wide. Flower stalks can rise up to 2 feet from the base.


Upright flower stalk rise from the leaf base, usually once a year. It forms clusters of greenish-white tubular shaped flowers.


Whale's fin plant can be poisonous when chewed or ingested. In general Sansevierias are mildly toxic for human and pets. Consumption in large doses can cause stomach irritation, nausea, vomiting etc.


The plant is less prone to pest infections and diseases. Spider mites and mealybugs are potential threats.


These plants can be propagated by root division or through rhizomes. Leaf cuttings that are at least 4 inches long can be grown in moist sand.

Growth Season

This evergreen plant actively grows during spring-summer season. It can flower anytime of the year, but mostly in summer to winter.

Growing Conditions


Light and fast-draining soil is best suitable for this plant. Recommended soil mix consists of 3 parts loam and 1 part of pumice.


Water once every other week in summer season, and once a month during winters. Allow the soil to dry completely before watering again.


It grows best and flowers in bright light. Can tolerate anything from full sun to low light. But protect from direct sun in hot summer afternoons. If grown outdoors, it prefers semi-shade to shade.


Well suited for indoor room temperature (60-80°F). Winter frost can kill the leaves, but rhizomes can be saved by keeping them dry. New leaves will emerge from such rhizomes in warmer conditions.

Care guide for Sansevieria Masoniana

Read about the ideal growing conditions for your Whale's fin plant or Mason's Congo. Learn how to repot, water, propagate and care for the Sansevieria Cylindrica.

Learn more about care and propagation of Sansevierias