Philodendron White Knight

Philodendron ‘White Knight

White Knight Philodendron Quick Overview

Full Size8-10 feet plus
LightBright indirect
Care LevelEasy

White Knight Philodendron are part of the Araceae family and originate from South America. This plant has lush green foliage with hints of white variegation flecked and marbled throughout.

White Knight Philodendron are one of my favourite houseplants. They will thrive when positioned in bright indirect light with a moderate humidity. Be sure to avoid direct harsh sunlight as this will burn the leaves.

In the sections below we will go through the basic care requirements of your Philodendron White Knight to make sure you have the best chance at keeping them happy and healthy.


The typical size of White Knight Philodendron with the correct care is up to 3 metres high when fully grown. It will take a long time to reach this size as the variegated leaves tend to grow slower than other philodendron varieties like “Rojo Congo.”

White Knight Light Requirements

Your White Knight will perform best when positioned in bright indirect light. Signs that your plant is getting not enough light is the plant becoming long and leggy while yellowing leaves are a sign of too much light. This can be resolved by changing the position of your plant to somewhere that better suits its light requirements.


White Knight Philodendron prefer warmer temperature conditions and will grow best when kept in an area which maintains a temperature of 55-80˚F (12-26˚C). When keeping your plant outside of this temperate bracket for prolonged periods of time you can expect it to develop health issues or seize growing.


Maintaining a moderate humidity (over 55%) will assist in keeping your Philodendron happy and healthy. Ideal indoor locations for this plant include, living rooms, bathrooms and kitchens. White knight philodendron can also be happily kept in greenhouses. Greenhouses give you greater control over environmental factors for long periods of time. Make sure to checkout our guide to keeping indoor plants in greenhouses.

If your plant is housed in a spot with a humidity level consistently outside of this range click here for tips on how to increase or decrease humidity levels.

Watering Requirements

You should water your White Knight Philodendron when the top 2 inches of soil is dry. When watering, be sure to water thoroughly allowing the water to drain completely. Aside from solely relying on the watering frequency to tell when your plant is thirsty, a tell tale sign that your White Knight needs water is drooping leaves.

Fertilizing requirements

In optimal conditions your White Knight Philodendron should be fertilized sparingly tri-annually. This will assist in keeping your plant alive as well as promote healthy growth. It’s recommended that you use a fertilizer that doesn’t contain heavy salts as they can damage the roots and may even cause the plant to die.

Soil Requirements

White Knight Philodendron require a rich, moist, well draining soil. It’s good to try and stay away from wet and sandy soils. It’s important to have a soil that drains well to prevent over-watering. Adding perlite to the potting mix will help to aerate the soil as well as improve drainage, this assists in avoiding issues such as root rot.


A good indicator that your white knight philodendron is ready for a new pot is it’s roots beginning to fill the entire pot. This is easily identified with roots visibly emerging from the soil when the plant is removed from the pot.

Re potting should be done during the early part of the growing season of spring. This gives your plant both the best chance to recover from any shock and promote growth. Choose a pot that is around 2 (5cm) inches larger in width and depth. After placing the philodendron into the new pot, thoroughly water your plant until water trickles from the drainage holes. A small application of liquid indoor plant fertilizer should help avoid any ‘re-pot’ shock.

White Knight Diseases & Pests

The most common diseases and pests that you can encounter whilst caring for your White Knight Philodendron is similar to that of related philodendron varieties such as “White Princess” and “Pink Princess. You can expect to come across aphids and mealy bugs most commonly. For a wider range of information on combating a large range of indoor plant diseases and pests click here.


Like all Philodendron, this particular species is considered to be toxic if ingested. All philodendron plants contain calcium oxalate crystals which are toxic to both humans and pets. Symptoms include a burning sensation and swelling of the lips, mouth, throat and tongue.

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