Updated: June 28, 2023

The Whale Fin plant, also known as Monstera adansonii, is a popular choice among houseplant enthusiasts for its unique and striking foliage. While it is commonly grown indoors, this tropical vine can also thrive outdoors under the right conditions. In this article, we will explore the steps to successfully grow a Whale Fin plant outdoors.

Selecting a Suitable Location

When choosing a location for your outdoor Whale Fin plant, it is important to consider its natural habitat. These plants are native to the rainforests of Central and South America, where they grow under the shade of taller trees. Therefore, it is best to find a spot that receives bright, indirect sunlight or dappled shade throughout the day.

Avoid placing your plant in direct sunlight for extended periods, as this can scorch its delicate leaves. Additionally, strong winds can damage the foliage, so ensure that your chosen location offers some protection from gusts.

Preparing the Soil

Whale Fin plants prefer well-draining soil that retains some moisture without becoming waterlogged. Before planting, prepare the soil by mixing equal parts of organic compost and coarse sand or perlite. This mixture will provide adequate drainage while supplying essential nutrients to the plant.

If your outdoor soil is heavy clay or compacted, consider creating a raised bed or using containers to ensure proper drainage. These plants also appreciate slightly acidic soil with a pH level between 5.5 and 7.

Planting Process

When planting your Whale Fin outdoors, follow these steps:

  1. Dig a hole twice as wide and deep as the plant’s root ball.
  2. Gently remove the plant from its container, taking care not to damage the roots.
  3. Place the plant in the hole and backfill with soil, ensuring that it is planted at the same depth as it was in its container.
  4. Press down firmly on the soil to eliminate any air pockets.
  5. Water the plant thoroughly after planting to settle the soil and provide moisture.

Watering and Fertilizing

Whale Fin plants prefer consistent moisture but are susceptible to root rot if overwatered. Water the plant deeply when the top inch of soil feels dry, allowing excess water to drain away. Avoid letting the plant sit in standing water, as this can lead to root issues.

During the growing season, from spring to fall, fertilize your Whale Fin plant every two weeks with a balanced liquid fertilizer diluted to half strength. This will provide the necessary nutrients for healthy growth and vibrant foliage. In winter, reduce the frequency of fertilization to once every month or two.

Providing Support

As a vining plant, the Whale Fin will benefit from some form of support structure. As it grows, it will send out aerial roots that can attach themselves to a trellis, fence, or wall. These roots help anchor the plant and provide stability as it climbs.

You can also train your Whale Fin to grow along a moss pole or a sturdy stake. This will encourage upward growth and create a visually appealing vertical display. Regularly check on the plant’s progress and gently guide its vines onto the support structure as needed.

Pruning and Maintenance

To keep your outdoor Whale Fin plant looking its best, regular pruning is essential. Remove any dead or yellowing leaves to maintain a tidy appearance and prevent disease. Trim back excessively long vines to encourage bushier growth.

Trimming can be done throughout the year, but it is best to avoid heavy pruning during winter when the plant’s growth slows down. Wear gloves while pruning as some people may experience skin irritation from contact with the sap.

Protecting from Cold Temperatures

While Whale Fin plants can tolerate slightly cooler temperatures, they are sensitive to frost. If you live in an area with cold winters, it is crucial to protect your plant from freezing temperatures.

Before the first frost, bring your Whale Fin indoors or into a greenhouse. If this is not possible, cover the plant with frost blankets or horticultural fleece to provide insulation. Avoid using plastic covers, as they can trap moisture and cause damage to the foliage.

Conclusion

Growing a Whale Fin plant outdoors can be a rewarding experience for any plant lover. By selecting a suitable location, providing proper care and maintenance, and protecting the plant from extreme temperatures, you can enjoy the stunning foliage and unique charm of this tropical vine in your outdoor space. Remember to adapt your watering and fertilizing routine based on the specific needs of your plant, and watch as it thrives in its natural environment.