Philodendron Gigas

The philodendron gigas is a spectacular climber, prized for its large, velvety leaves that change dramatically as they mature. This rare and sought-after aroid has captivated plant enthusiasts with its stunning foliage and unique growth habit. If you’re lucky enough to own one or are considering adding it to your collection, this guide provides everything you need to know.

We will cover its origins, detailed care instructions, propagation methods, and how to address common problems. By the end, you’ll feel confident in your ability to help this magnificent plant thrive in your home.

Native to the rainforests of Panama and Colombia, the Philodendron Gigas is a hemiepiphytic plant. This means it begins life on the forest floor and then climbs up trees, using its aerial roots to anchor itself and gather moisture and nutrients from the air. Its name “Gigas” comes from the Greek word for “giant,” a fitting tribute to its impressive leaves.

In its natural habitat, it can produce leaves over three feet long. While indoor specimens typically max out at a still-impressive two feet, the visual impact is undeniable. The plant’s most distinctive feature is the texture and color transformation of its leaves, which we’ll explore next.

Foliage And Growth Characteristics

The leaves of a young Philodendron Gigas are a bright, coppery-green with prominent light green or silver veins. As the leaves mature, they undergo a remarkable change. The velvety texture deepens, and the color shifts to a dark, almost blackish-green, while the veins often remain a contrasting lighter shade.

New leaves emerge tightly rolled in a cataphyll, a protective sheath, and unfurl slowly to reveal their splendor. The plant has a strong climbing habit and will produce longer internodes (the spaces between leaves) if not given adequate support. Providing a moss pole or plank is essential for encouraging larger, more typical leaf development.

Taxonomy And Common Confusions

It’s easy to confuse Philodendron Gigas with other velvety philodendrons, especially when they are young. Here are the key differences:

Philodendron Melanochrysum: Often mistaken for Gigas. Melanochrysum leaves are a lighter, golden-green when young and lack the pronounced silver veining. The leaf backs of Melanochrysum are typically reddish, while Gigas backs are a uniform green.
Philodendron Verrucosum: Has textured, “warty” petioles (leaf stems) and more heart-shaped leaves with lighter green backs and red undersides.
Philodendron Giganteum: A different species entirely, with large, glossy green leaves that lack any velvety texture.

Knowing these distinctions can help you ensure you’re getting the true Philodendron Gigas, which has become more widely available but is still considered a collector’s plant.

Complete Care Guide For Philodendron Gigas

Caring for a Philodendron Gigas requires mimicking its tropical rainforest origins. The key pillars are bright indirect light, consistent warmth and humidity, and a well-draining soil mix. Getting these elements right will prevent most issues and allow your plant to grow vigorously.

Light Requirements

This plant thrives in bright, indirect light. Think of the dappled sunlight it would receive under the canopy of taller trees. An east-facing window is often ideal, providing gentle morning sun. A north-facing window may be too dim, while a south or west-facing window requires filtering with a sheer curtain to prevent leaf scorch.

Signs of incorrect light include:

Too much light: Leaves turn pale, develop brown, crispy patches, or yellow.
Too little light: Growth becomes leggy with small leaves, and the vibrant leaf color and velvety texture may not develop properly. The plant will also grow much slower.

Watering And Humidity

Watering is a common point of failure. The goal is to keep the soil consistently moist but never soggy. Allow the top inch or two of soil to dry out between waterings. Stick your finger into the soil to check; if it feels dry, it’s time to water. Thoroughly soak the soil until water runs from the drainage holes, then empty the saucer.

Humidity is crucial. Aim for 60% or higher. Low humidity can cause brown, crispy leaf edges and slow growth. Here are some ways to increase humidity:

Use a humidifier placed near the plant (most effective method).
Place the pot on a pebble tray filled with water (ensure the pot sits above the water line).
Group it with other humidity-loving plants.
Occasional misting can help, but it’s a temporary fix and should not replace other methods.

Soil And Potting Mix

A loose, airy, and well-draining potting mix is non-negotiable. A standard houseplant soil retains too much moisture and will lead to root rot. A good DIY mix for Philodendron Gigas could include:

1 part high-quality indoor potting soil
1 part orchid bark (for aeration and chunkiness)
1 part perlite or pumice (for drainage)
A handful of horticultural charcoal (optional, helps keep the mix fresh)

This combination allows water to flow through quickly while retaining enough moisture and providing oxygen to the roots. Repotting is typically needed every 1-2 years in spring or early summer, or when you see roots circling the bottom of the pot.

Temperature And Fertilization

Maintain temperatures between 65°F and 80°F (18°C – 27°C). Avoid cold drafts, air conditioning vents, and sudden temperature drops below 60°F (15°C), which can shock the plant.

Feed your Philodendron Gigas during the active growing season (spring and summer). Use a balanced, water-soluble fertilizer (like a 10-10-10 or 20-20-20 formula) diluted to half strength every 4-6 weeks. Reduce or stop fertilizing completely in fall and winter when growth slows. Over-fertilization can damage the roots and cause leaf burn, so when in doubt, use less.

Support and Training Your Plant

As a natural climber, your Philodendron Gigas needs support to look its best. Without it, the stems will trail or grow awkwardly, and the leaves will remain smaller.

Choosing A Support Structure

The best supports are those that mimic a tree trunk and can retain moisture for the aerial roots to attach to. A sphagnum moss pole is the top choice. You can also use a cedar or tree fern plank. These porous, moisture-holding materials encourage the plant’s aerial roots to latch on, which signals the plant to produce larger, more mature leaves.

How To Attach The Plant

Insert the support into the pot at the time of repotting for stability, or carefully add it to an established plant.
Gently tie the main stem to the pole or plank using soft plant ties, velcro tape, or even old nylon stockings. Avoid using wire or string that can cut into the stem.
As the plant grows, continue to loosely secure new growth to the support.
Keep the support moist by spraying it when you water or mist the plant. This will actively encourage the aerial roots to attach.

Propagation Methods

Propagating Philodendron Gigas is usually done through stem cuttings. This is best undertaken in spring or early summer when the plant is actively growing. Here is a step-by-step guide.

Step-by-Step Propagation In Water

Identify a healthy stem with at least one node (the bump where leaves and roots emerge) and 1-2 leaves.
Using a clean, sharp knife or shears, cut just below a node.
Place the cutting in a jar of room-temperature water, ensuring the node is submerged but the leaf is not.
Place the jar in a warm spot with bright, indirect light.
Change the water every few days to keep it fresh. Roots should begin to appear from the node in 2-4 weeks.
Once the roots are a few inches long, you can pot the cutting in your aroid soil mix.

Step-by-Step Propagation In Sphagnum Moss

Take a cutting as described above.
Soak sphagnum moss in water and then squeeze out the excess so it is damp but not dripping.
Place the moss in a clear container (like a deli cup) and insert the cutting, node-down into the moss.
Close the container lid or cover with a plastic bag to create high humidity.
Place in bright, indirect light and air out the container every few days.
Check for root growth through the clear container. Once a healthy root system has developed, pot it up.

Propagation in moss often results in stronger initial roots adapted to a solid medium, which can reduce transplant shock. Whichever method you choose, be patient, as this plant can sometimes be slow to root.

Common Problems and Solutions

Even with great care, you might encounter some issues. Here’s how to diagnose and fix common problems with Philodendron Gigas.

Yellowing Leaves

Yellow leaves can have several causes. The most common is overwatering, which leads to root rot. Check the soil moisture and the roots. If they are brown and mushy, you will need to take cuttings from healthy stems to save the plant. Other causes include under-watering, nutrient deficiency, or natural aging of older leaves at the bottom of the plant.

Brown Leaf Edges Or Tips

This is almost always a sign of low humidity. Increase the ambient moisture around your plant using the methods described earlier. It can also be caused by inconsistent watering, where the soil dries out too much between drinks, or a buildup of salts and minerals from tap water or fertilizer. Using filtered or distilled water can help prevent this.

Pests

Philodendron Gigas can be susceptible to common houseplant pests. Regularly inspect the undersides of leaves and stems.

Spider Mites: Look for fine webbing and tiny moving dots. Increase humidity and treat with insecticidal soap or neem oil.
Mealybugs: Appear as small, white, cottony masses. Remove with a cotton swab dipped in rubbing alcohol.
Thrips: Cause silvery streaks and black specks on leaves. Isolate the plant and treat with an appropriate insecticide.

Early detection is key for easy pest management. Isolate any affected plant immediately.

Leggy Growth And Small Leaves

This indicates insufficient light. Move your plant to a brighter location (with indirect light). Also, ensure you have provided an adequate support structure; the plant may not feel stable enough to produce its characteristic large foliage.

Frequently Asked Questions

How Fast Does Philodendron Gigas Grow?

Under ideal conditions with high humidity, warm temperatures, and good light, Philodendron Gigas is a moderately fast grower during the spring and summer months. You can expect a new leaf every few weeks. Growth slows or stops in the winter.

Is Philodendron Gigas Toxic To Pets?

Yes, like all philodendrons, Philodendron Gigas contains calcium oxalate crystals which are toxic to cats, dogs, and humans if ingested. It can cause oral irritation, drooling, and difficulty swallowing. Keep this plant out of reach of pets and children.

Why Are The New Leaves On My Gigas Not Velvety?

The velvety texture (known as pubescence) develops as the leaf matures. Brand new leaves will be smooth and shiny. The characteristic velvety feel and darker color will come in over the following weeks as the leaf hardens off.

Can I Grow Philodendron Gigas In A Terrarium?

While it loves humidity, a mature Philodendron Gigas grows too large for most terrariums. However, a young plant or a propagation cutting can do very well in a large, tall terrarium or greenhouse cabinet where its climbing habit can be accommodated. Ensure there is excellent air circulation to prevent fungal issues.

What’s The Difference Between Philodendron Gigas And Philodendron Pastazanum?

They are sometimes confused. Pastazanum has more rounded, heart-shaped leaves with a matte, velvety texture, but its veins are not as strikingly silver or light green. The leaf color is also a more uniform green without the dramatic darkening seen in mature Gigas leaves. The growth habit of Pastazanum is also more crawling than climbing.

Caring for a Philodendron Gigas is a rewarding experience for any plant lover. Its dynamic foliage and impressive presence make it a standout in any collection. By providing the right balance of light, water, humidity, and support, you’ll be able to enjoy this spectacular climber for years to come. Remember to observe your plant closely; it will often tell you what it needs through its leaves and growth patterns. With a little attention, your Gigas will thrive and become a true centerpiece of your indoor jungle.