Monstera is best known for its dramatic leaves filled with natural cuts and holes, a feature called fenestration. These unique openings are one of the main reasons this tropical plant is so popular among indoor plant lovers.
When Monstera is young, it typically produces simple, solid, heart-shaped leaves. As the plant grows and matures, its foliage gradually becomes larger and more complex, often developing splits along the edges and holes within the leaf surface. This change is a natural part of the plant’s development and can occur in different Monstera species, not just one specific type.
In its natural habitat, Monstera is a climbing plant that uses aerial roots to attach itself to trees and grow upward toward brighter light. This climbing habit influences how its leaves mature over time. Fenestration does not appear on existing leaves, since each leaf’s shape is fixed once it unfurls, and only new growth can develop splits under the right conditions.
In this blog, we will explore what actually influences Monstera leaf splitting and how you can encourage healthier, more mature growth over time.
Image: @New Africa
What Is the Science Behind Monstera Fenestration?
Fenestration is closely connected to leaf maturity and the environment in which Monstera grows.
Scientists have proposed several possible reasons why Monstera developed split leaves in nature. Fenestrations may help the plant adapt to changing light, rainfall, wind, and other conditions within tropical forests.
Research has also found differences between Monstera leaves grown under brighter conditions and those growing in heavier shade, suggesting that light availability can influence how mature foliage develops.
However, fenestration is not controlled by light alone.
Age, climbing habit, plant health, genetics, root development, and overall growing conditions all contribute to how the foliage matures.
For indoor growers, the important lesson is simple. Do not try to force individual leaves to split. Help the whole plant grow stronger and more mature instead.
How to Get Monstera Leaves to Split
1. Give Your Monstera Bright, Indirect Light
Light is one of the most important factors for encouraging larger, more mature Monstera leaves.
A Monstera can survive in moderate or relatively low indoor light, but surviving and thriving are not the same thing. When light is limited, growth may become slower, stems may stretch, and new leaves can remain small or poorly fenestrated.
An east-facing window can provide gentle morning sunlight. Near south-facing or west-facing windows, filtered light through a sheer curtain may help protect the foliage from intense afternoon sun.
Too much harsh direct sunlight can scorch the leaves, particularly if the plant has been growing in lower light. If you want to move your Monstera to a brighter location, increase its exposure gradually.
2. Give Your Monstera Something to Climb
Monstera deliciosa naturally wants to grow upward.
In the wild, it climbs tree trunks using aerial roots. Indoors, providing vertical support can help recreate this natural growth habit.
A moss pole, coir pole, wooden plank, cedar board, or sturdy trellis can all work.
Position the main stem close to the support and secure it gently. Avoid tying the leaf stalks too tightly because the plant still needs room to move and grow.
As the plant establishes itself vertically, its aerial roots may begin growing toward or attaching to the support.
3. Be Patient With Young Monstera Plants
Sometimes the only thing your Monstera needs is time.
Juvenile Monstera plants naturally produce smaller leaves without holes or deep splits. This does not mean the plant is receiving poor care.
As the plant matures, you may notice a gradual progression.
The earliest leaves may be completely solid. Later leaves may develop one small cut near the edge. Future foliage may show deeper splits or internal holes. Eventually, a mature plant under suitable conditions can produce large leaves with multiple fenestrations.
There is no universal leaf number or exact age when this will happen.
Two Monsteras of the same age can develop differently depending on genetics, propagation history, light, support, and overall growing conditions.
Image: @NICKY1841
4. Water Consistently Without Keeping the Soil Wet
Watering does not directly cause leaves to split, but healthy roots are essential for mature growth.
Allow the upper portion of the potting mix to dry slightly before watering again. When you water, thoroughly moisten the soil and allow excess water to drain from the bottom of the pot.
Avoid following a rigid watering schedule.
A Monstera may need water more frequently during warm, bright periods and less frequently during cooler or darker months.
Consistently soggy soil can reduce oxygen around the roots and increase the risk of root rot. Severe underwatering can also slow growth and cause stress.
The goal is to provide enough moisture for active growth without allowing the roots to remain waterlogged.
5. Use an Airy, Well-Draining Potting Mix
Monstera roots need both moisture and oxygen.
Heavy, compacted soil can remain wet for too long, especially indoors where evaporation is slower.
Use a loose, well-draining potting mix that allows excess water to move through the container while still holding enough moisture for the roots.
A quality indoor tropical plant mix can work well. Adding ingredients such as orchid bark or perlite can improve aeration if the mix feels too dense.
Always choose a pot with drainage holes.
Good drainage helps protect the roots and supports the steady growth needed for larger leaves.
6. Feed Your Monstera During Active Growth
Producing large leaves requires nutrients.
As potting soil ages, nutrients gradually become depleted. Regular feeding during active growth can help support healthy foliage development.
Use a balanced houseplant fertilizer according to the manufacturer's instructions.
Do not assume that extra fertilizer will produce extra fenestrations.
Overfertilizing can burn roots, cause salt buildup, and stress the plant. Fertilizer works best as part of an already healthy care routine.
When your Monstera has good light, strong roots, climbing support, and proper watering, feeding can help it maintain the vigorous growth needed for larger foliage.
7. Maintain Warm Temperatures and Moderate Humidity
Monstera is a tropical plant and generally prefers warm, stable conditions.
Normal indoor temperatures are usually suitable, but prolonged exposure to cold drafts or sudden temperature fluctuations can slow growth.
Moderate humidity also helps keep the foliage comfortable.
Very dry air may contribute to crispy leaf edges or stress, particularly during winter when indoor heating reduces humidity.
If your home is extremely dry, a humidifier can provide more consistent humidity than occasional misting.
Image: @Firn
Common Mistakes When Trying to Get Monstera Leaves to Split
Never cut artificial holes or slits into a Monstera leaf. Natural fenestrations form while a new leaf is developing. Cutting an existing leaf only damages the plant. A solid leaf that has already opened will remain solid.
More light can help, but intense direct sun is not the same as bright indirect light. Suddenly exposing an indoor Monstera to strong afternoon sunlight can scorch the foliage. Increase light gradually.
More fertilizer does not equal more fenestration. Excess fertilizer can damage the roots and ultimately slow the growth you are trying to encourage.
Repotting is useful when necessary, but repeatedly disturbing the root system can create unnecessary stress. Only repot when the plant has genuinely outgrown its container or the soil needs replacing.
Q&A for Monstera
Where to buy Monstera online?
If you're looking to buy Monstera online, Succulents Box is one of the top sources for succulents and houseplants in the U.S., with our own greenhouses in California. We ship directly to your door with a live plant guarantee.
We also offer a wide variety of succulents and houseplants to pair with Monstera. Visit Succulents Box to explore our full collection.
