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Philodendron Red Diamond – A Tropical Indoor Plant

by gardeningit
Philodendron Red Diamond

To add a pop of color to your indoor plant collection, you should grow Philodendron Red Diamond. It is a spectacular tropical plant with red-burgundy to glossy green foliage. Its stems are tinged with dark red color, while its leaves are deep-green and glossy. All the leaves grow compactly and appear like a bouquet of red-green flowers.

Read this article if you want to learn more about this Philodendron. This article also covers an easy-care guide to help you grow this plant in your home.

Philodendron Red Diamond Classification

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


Philodendron Red Diamond is a cultivar of Philodendron Erubescens native to Colombian rainforests. Red Diamond Philodendron is native to the West Indies and Central and South America, particularly their rainforests.

Philodendron Red Diamond Appearance


Philodendron Red Diamond has red-tinged foliage, which looks splendid with glossy-green leaves. The stems are deep red, but the leaves are green-colored. Young leaves are crimson-colored and change to grassy-green as they mature. The ovate to elliptical leaves grow in a rosette pattern.

This Philo resembles Philodendron Squamicaule because both these plants have red stems.


It does not produce any visible or showy flowers. The only inflorescence it grows consists of a white spadix and spathe.

Philodendron Red Diamond Size

Philodendron Red Diamond attains a mature height of 1 to 2 feet. It doubles its size in a year, so it needs yearly repotting.

Philodendron Red Diamond Care

Philodendron Red Diamond care requirements involve proper watering, fertilization, and misting. It needs to be watered once or twice a week and misted twice a day. Monthly fertilization is necessary for its growth. For growing medium, use an all-purpose, well-draining potting mix. Other care needs involve 50% humidity and 18-28°C room temperature.

Quick Guide

  • Watering: 1-2 times a week.
  • Soil type: All-purpose, well-draining potting mix.
  • Sunlight: Moderate sunlight.
  • Temperature: 18-28°C.
  • Humidity: More than 50%.
  • Fertilizer: Once every month with a balanced fertilizer.

Watering Requirements

Philodendron Red Diamond needs regular watering, whether in hot summer or cold winter. It should be fertilized once a week in the growing season. When the days are too hot, its soil may get dry soon, so you will have to water it twice a week. But in winters, the watering frequency should be decreased to once every 10 to 12 days.

The general rule of thumb is to allow the soil to dry 50% before watering the plant again. Do not stick to the above schedule. As soon as 50% of soil gets dry, water your plant.

Soil Requirements

This plant should be grown in a porous and loose potting mix. It is because loose potting mix drains faster and does not let the water stand in the air spaces of soil. This way, it prevents root rot and soggy soil. You can use an all-purpose potting mix for this plant.

An all-purpose potting mix includes peat moss, perlite, and potting soil. You can also use other chunky materials in the potting mix to increase its drainage. Coco chips, brick bits, grainy sand, and crushed bark are perfect for this purpose. You can also use cactus mix mixed with peat moss and soil.

Philodendron Red Diamond Sunlight Requirement

The vibrant-colored foliage of Philodendron Red Diamond needs moderate to the bright sun to grow properly. It cannot tolerate low light, so you should never place it in full shade. Less sunlight exposure leads to droopy foliage. Your plane should receive at least 6 hours of sun exposure every day.

A well-lit room with north or east-facing windows is perfect for its placement. Place the plant 6 feet away from the window. You should also rotate the plant in its place so that all parts of its foliage receive equal sunlight and grow evenly.

Temperature Requirements

Philodendron Red Diamond care involves keeping it safe from the cold. This plant is susceptible to cold injuries, so you should not place it outdoors in winters. It cannot tolerate temperatures below 16°C in winters. When indoors, the temperature should be around 18°C to 28°C for this plant’s best growth.

Growing this plant indoors also protects it from severe temperature fluctuations. Sudden temperature changes affect its growth rate; it can also push the plant into dormancy, which is the last thing any plant owner wants to happen.

This plant should also be kept safe from air drafts. Cool or hot drafts are equally harmful to their foliage. Therefore, you should never place it near a fan or heater.


The gorgeous red leaves of this Philodendron cultivar need at least 50% humidity to stay plush and healthy. The reason is that this plant is accustomed to living in a humid environment in its natural habitat.

50% humidity is moderate humidity, so it is easy to achieve. You should mist the plant twice a day to maintain the high moisture level around it. You can also place a bowl filled with water near this plant to increase humidity. Installing a humidifier is the most practical option, but it is expensive.


This plant needs fertilizer every month to maintain its growth rate. You should use a balanced liquid fertilizer to feed your plant. You can also use a slow-release fertilizer. As its name indicates, it will slowly dissolve into the soil, and thus it will be available to the roots for many months. If you prefer slow-release fertilizer, you should use it twice a year.

The best option is to use organic fertilizers. Organic fertilizers do not have the potential to harm your plant as chemical fertilizers do. You can use manure, compost, or decomposed mulch as an organic fertilizer for your plant.

Philodendron Red Diamond Pruning

Do not prune the foliage unnecessarily; you should let the plant grow itself. But if you want to make the plane more aesthetically pleasing, you can remove the old, yellow leaves. Cutting the old leaves before the growing season is the best way to ensure that the new leaves have enough room to grow.

You should always sterilize your equipment before pruning your plant. Use rubbing alcohol to wipe the blade of your pruning shears. You can also sterilize it by holding it over a flame for some minutes.

How to Propagate Philodendron Red Diamond?

Philodendron erubescens Red Diamond can be propagated through plantlets or seeds. The seeds of this plant are hard to get, so you are left with the plantlets method.

If you have never propagated a plant through its plantlets before, here is an easy guide for your help.

  • Wait until the plant is mature. Only mature plants produce plantlets which can then be used for propagation.
  • You should place your plant in bright, indirect sunlight because bright sunlight encourages the growth of plantlets.
  • Look at the base of the plant for plantlets. You should take only those plantlets which have aerial roots.
  • Cut these plantlets with sterilized scissors.
  • Place them in separate pots into a well-draining potting mix.
  • You should provide them with the same growing conditions as the mother plant.

Philodendron Red Diamond Basic Features


Red Diamond Philodendron is a fast-grower. It produces new large leaves to form a bouquet in just 2 months. Its growth rate is affected by sunlight exposure and fertilization.


This plant has toxic compounds in its leaves. Therefore, it is poisonous for pets and children. You should never leave your toddler or nibbling pet alone in the same room as this plant.

Air Purification

This Red Diamond Philo also improves the air quality around it. Its large leaves remove formaldehyde and benzene from the atmosphere, thus making the air healthier to breathe. Therefore, it is an excellent choice as an indoor plant.

Drought Tolerance

The fleshy stem and large leaves of this plant retain water for droughts. Thus, it is a drought-tolerant plant with a tendency to survive through periods of low water availability.


Luckily, it is a low-maintenance plant that does not need much care and attention. If you provide it with its basic needs, it will not bother you and grow on its own.


This plant saves itself from cold injuries and low temperatures by going dormant in winters. It reduces its growth rate and starts to conserve its nutrients. Therefore, this plant needs less watering and no fertilization in colder months.

Common Problems and Their Solutions


Philodendron Red Diamond is susceptible to Erwinia blight and Xanthomonas infection. Both these diseases have their distinct symptoms. If this plant has brown patches on its leaves, it means the plant has Erwinia blight. It is a bacterial infection that occurs due to overhead watering.

On the other hand, Xanthomonas is confirmed by yellow fluid-filled spots on leaves. It is a viral infection that is also caused by overhead watering.


Luckily, this plant is pest-resistant. Sometimes, it is attacked by some aphids, gnats, and mealybugs due to wet foliage after misting. But these pests are easy to remove. You can get rid of them by wiping the foliage using a cloth dipped in rubbing alcohol. You can also use insecticidal soap for this purpose. Mix one part insecticidal soap in one part water and spray the leaves with the mixture. It will drive the pests away.

Philodendron Red Diamond FAQ

Why Isn’t My Philodendron Red Diamond Growing New Leaves?

If your plant has lost its fuller look and is not growing new leaves, you need to fertilize it. Replenishing its supply of nutrients will help this plant produce new growth quickly. You should also move your plant to a well-lit spot if you want it to have compact foliage.

Does It Need Regular Misting?

Yes, this plant needs regular misting. It thrives in high humidity, so you need to mist it twice a day to increase the moisture level around it. If your room’s humidity stays around 50% due to the rainy season or humid winds, there is no need to mist this plant then.

Why Is My Red Diamond Philodendron Losing Its Red Tint?

If your plant is losing the bright red color of its foliage, it means it is not getting enough light exposure. In such a condition, you should move your plant to a well-lit spot that has bright, indirect sunlight. 1-2 hours of direct morning sun is also beneficial for the vibrant-colored foliage of this Philodendron.


If you love to grow fascinating plants in your home, Philodendron Red Diamond is an excellent choice. It is a tropical evergreen species with red-burgundy stems and large, green leaves. The large leaves also act as natural air purifiers that improve the air quality. Therefore, it is a must-have plant indoors. Moreover, it is easy to care for because of its low-maintenance foliage. If you are a beginner who has never kept houseplants before, you can use our care guide to grow this Red Diamond Philo in your home.

Have a look at our Philodendron Plowmanii article next.

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