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Philodendron Corsinianum – The Monstrous Philo

by gardeningit
Philodendron Corsinianum

Growing a large, leafy Philodendron in your home is the best way to bring nature indoors. Philodendron Corsinianum is a gorgeous evergreen plant with wide, luminous deep-green leaves. It is a fast-growing climbing vine that makes an excellent addition to indoor plant collection. Due to its widespread foliage, it looks good everywhere, from a living room to a bedroom, from a patio to a foyer.

Even if it is a low-maintenance plant, you still need to know about its basic needs. So, we have included a simple guide in this article that will help you take care of this lovely plant.


  • Family: Araceae
  • Subfamily: Aroideae
  • Genus: Philodendron


This plant is a man-made hybrid produced by a cross between Philodendron verrucosum and Philodendron pinnatifidum. It was created in La Cascine, which is a garden in the famous city of Italy, Florence. This plant gets its name from Prince Corsini.



This magnificent plant has the most gorgeous foliage. It has large, cordate, deep-green leaves that have reddish-pink undersides. The undulating margins of the leaves add to the beauty of its foliage.


It is a flowering plant that produces inflorescence in the form of a spathe. It only blooms in summer, but it does not bloom indoors.


This gigantic plant can attain a mature height of 9 to 10 feet.

Philodendron Corsinianum Care

Philodendron Corsinianum prefers frequent watering. You should water it once every 2 days during spring and summer. For best growth, it must be provided with bright, indirect sunlight, 50-60% humidity, and 12ºC to 27ºC temperature. You should plant it in a pot filled with well-draining soil rich in organic matter. It should also be re-potted every 1-2 years.

Quick Guide

WateringOnce every 2 days in the growing season
Soil typeWell-draining, rich organic soil
SunlightBright, indirect sunlight
Temperature12ºC to 27ºC
FertilizerA slow-release fertilizer tri-annually
RepottingEvery 1-2 years


Philodendron x Corsinianum loves moist soil. Therefore, it should be watered more frequently than other Philodendron plants. Its watering needs to change in summers and winters, so we are mentioning both here.

In summers, you should water this plant nearly every 2nd day to protect it from the intense heatwave. But in winters, it needs less watering. Weekly watering or watering it once every 10 days works just fine in the colder months.

Make sure its pot has an unclogged drainage hole to protect this plant from standing water. Standing water leads to root rot, and thus it must be avoided.


Because it is a Philodendron, it prefers to grow in loose, well-draining soil. Loose soil also helps the plant prevent root rot because it does not let water get collected in its air spaces. Loose soil is also an excellent choice for ventilation. Good airflow through the roots provides oxygen to them, keeping the plant healthy and fresh.

A mixture of potting soil, perlite, and compost is perfect for this plant. You can also add peat moss to this potting mix to increase the moisture-holding capacity of the soil. You can also grow this plant in a soilless medium, for example, sphagnum peat moss.


Most Philodendrons grow best in a well-lit spot. Therefore, a room with a good amount of windows is chosen to grow indoor plants. The same is the case with this lovely Philo. It needs bright sunlight to grow indoors. Its large leaves droop down if they do not receive sufficient sunlight exposure. However, only indirect sunlight is tolerated by this plant. Direct sun can easily burn its leaves and scorch its foliage.

You should keep this plant 6 feet away from a south-facing window in your room. But if you have a northern or eastern window, this plant must be placed right near the windowsill for optimum sunlight exposure.


It is a tropical plant; therefore, it prefers tropical temperatures. Warmer rooms and surroundings are ideal for this plant. So if you have Philodendron Corsinianum in your home, you should maintain your indoor temperature to around 12ºC to 27ºC. This plant is sensitive to heat and cold, so you should keep it at relative room temperature during summers and winters. Moreover, protect its foliage from sudden temperature fluctuations. It causes the leaves to drop suddenly.


To keep your plant fresh and healthy, you must keep it in a humid environment. Its large leaves need a good amount of moisture in the air to maintain their shape and texture. The ideal humidity for this plant is 50% to 60%. It is in the moderate humidity range; therefore, it can be easily maintained indoors.

To increase your indoor humidity, you must group all your houseplants together. But to increase the humidity around an individual plant, you should place a bowl of water near it. You can also place this plant in your bathroom during dry days because bathroom humidity stays around 50% normally.


This gorgeous Philo needs help growing during the season of active growth. Like humans, it needs food but in the form of nutrients. Soil does not provide all the nutrients to a plant. Therefore, you have to fertilize the plant to add nutrients to it. This plant needs to be fertilized regularly with a slow-release houseplant fertilizer.

Because it is a slow-release fertilizer, it slowly gets absorbed into the soil and slowly releases nutrients. These nutrients stay in the soil for an elongated period. Therefore, you do not need to fertilize this plant every month. It needs to be fertilized three times a year, excluding the winter months.


The large leaves need no trimming to help them in their growth. But you can trim or prune the stems if you want to control the size of your plant. Occasional pruning is not necessary, you should do it only once or twice a year.

But if you are pruning the plant for removing old leaves, you should do it before the start of the growing period. Because if you trim the foliage in the growing season, its growth rate decreases significantly.

How to Propagate Philodendron Corsinianum?

Corsinianum Philodendron is a man-made hybrid, so you cannot propagate it through its seeds. Its propagation is done by its stem cuttings. Let us follow you through the basic steps of Philodendron Corsinianum propagation.

  • Sterilize your pruning shears by rubbing their blades with 70% isopropyl alcohol.
  • Take a cutting from a healthy stem by using these sterilized shears.
  • Spray some rooting hormone on the stem cutting and the wound of the mother plant. It will speed up callus formation.
  • You can root this cutting in water or soil, whichever you prefer. But let us mention the water method takes less time.
  • Once new roots are formed, plant the stem cutting into proper potting soil.
  • Place the pot in a brightly-lit room.

Philodendron Corsinianum Basic Features


This evergreen vining plant grows quickly to fill up all the available space around it. It is a fast-growing plant that reaches its mature height in 1 to 2 years.


Do not get deceived by the alluring large leaves of this Philo. These pretty leaves are quite poisonous for pets and humans. You should never allow your toddler or pet to go near this plant. Because if they ingest any part of its foliage by mistake, they can suffer from mouth swelling, vomiting, drooling, or GI tract problems.

Air Purification

The gorgeous leaves of this plant contribute to creating a healthy environment in your home by filtering the indoor air. It is one main reason that Philodendron Corsinianum is an excellent plant for bedrooms, living rooms, and small apartments.

Drought Tolerance

As a hybrid, it has better qualities than either of its parent plants. Therefore, this plant has a tolerance for droughts higher than the other two plants. Its large leaves retain water and use it in days of harsh conditions, such as droughts.


If you have never tried indoor gardening but love houseplants, we recommend you start a new hobby by growing this Corsinianum in your home. It is a low-maintenance plant that will not bother you much about its care needs. Plus, you will learn a lot about indoor plants from this forgiving Philodendron.


Dormancy is common for this plant but in its natural habitat only. You can prevent dormancy in an indoor Corsnianum by keeping it in ideal growing conditions even in winters. If you do not let the temperature fall indoors and keep this plant in a well-lit room, it will not go dormant during the chilly season.

Common Pests and Their Problems


Because it is a hybrid, this Philodendron is not prone to any plant diseases. However, it can easily get root rot. Let us tell you why.

This plant requires frequent watering. It means sometimes its soil is not allowed to dry completely between its waterings. Damp or waterlogged soil leads to root rot. You can prevent this problem by allowing your plant’s topsoil to dry out between waterings.


Pests are a minor problem for this plant. But if you are extra conscious about these sap-sucking insects attacking your plant, you should spray the foliage with a pesticide every week to rule out the possibility of a pest infestation.

Philodendron Corsinianum: FAQs

Why does my Philodendron x Corsinianum have droopy foliage?

This plant has wide, elongated leaves growing on long, sleek stems. Due to the heavier leaves, the stems droop down a bit. But if your plant has droopy foliage along with dead leaf tips, it is not normal. In such a case, your plant needs more watering.

Is it a rare plant?

Yes, the Philodendron Corsinianum hybrid is a rare plant of the Philodendron genus. It is found in limited areas in the world, given that it is a man-made hybrid and does not grow in nature. 

Does this plant need repotting?

Yes, you should re-pot this plant to a new, bigger pot when it doubles its size or after every 1-2 years, whichever comes first. Summer is the best time to re-pot this plant. Moreover, you should always renew the potting soil while repotting this plant into a new home.


Philodendron Corsinianum is an appealing evergreen vine of the Araceae family. It is a low-maintenance houseplant that can be grown indoors without any hassle. Its long list of good traits does not end here. This plant is also drought-tolerant and has a natural air purifier. So, if you are thinking about growing an indoor plant, this Corsinianum Philodendron is an excellent choice.

Have a look at our Philodendron Sodiroi article next.

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