Why do you need an aroid mix?
Why use a special soil mix for Aroids?
The complete guide to choosing the perfect substrate for Monsteras, Pothos, Philodendrons, and other Aroid plants
🌿 In short: Aroids are some of the most popular plants for home growing, yet many do not know that they require unique soil conditions. Using a special Aroid mix can be the difference between a plant that survives and a plant that thrives.
What are Aroid plants?
The Aroid family (Araceae) is one of the largest and most diverse plant families in the world. It includes over 3,700 species, among them some of the most beloved houseplants:
Monstera
Monstera
Pothos
Pothos
Philodendron
Philodendron
Syngonium
Syngonium
Alocasia
Alocasia
Aglaonema
Aglaonema
Anthurium
Anthurium
Spathiphyllum
Spathiphyllum
What unites all these plants is not only their spectacular tropical appearance but also their similar needs regarding soil conditions.
Where do they come from? Understanding the natural habitat
To understand why Aroids need a special soil mix, you have to know their natural habitat.
Most Aroid plants come from the tropical rainforests of South America, Central America, and Southeast Asia. There, they grow under very unique conditions:
🌴 Growth conditions in the rainforest:
- Epiphytes or semi-epiphytes - Many of them grow on tree trunks, not in regular soil. Their roots are exposed to the air and cling to tree bark, decomposing leaf layers, and organic debris.
- High humidity but perfect drainage - Despite frequent rains, water does not stay around the roots. It flows quickly through the organic debris layer.
- Constant ventilation - The aerial roots are exposed to constant airflow.
- Decomposing organic matter - The plants feed on fallen leaves, decomposing tree bark, and light organic material.
When we grow these plants at home, we must simulate these conditions as closely as possible. And that is exactly where the Aroid mix comes into the picture.
Why is regular soil not suitable?
Standard potting soil or universal indoor plant soil can be very problematic for Aroid plants. Here are the reasons:
⚠️ The problems with regular soil:
1. Poor drainage
Regular soil holds water for a long time. For Aroids, this is a recipe for disaster - the roots sit in water, suffocate, and start to rot. Root rot is the number one cause of death for Aroid plants in homes.
2. Compaction and settling
Over time, regular soil tends to compact and tighten. The result: roots cannot get oxygen, growth stops, and the plant weakens.
3. Lack of aeration
Aroid roots are used to air. In dense, heavy soil, they simply suffocate.
4. Environment for fungi and diseases
Moist, dense soil is an ideal environment for the development of fungi, mold, and root diseases.
What is in a professional Aroid mix?
A quality soil mix for Aroids consists of several components that together create the ideal environment:
🥥 Coconut chips / Coco-peat
A light and airy base that holds moisture but drains excellently. Simulates the organic matter layer in the rainforest. pH neutral and root-friendly.
🌲 Bark
Pieces of pine or other tree bark that create air pockets and prevent compaction. Simulates the tree bark that Aroids grow on in nature.
⚪ Perlite
White, lightweight granules of expanded volcanic glass. They significantly improve drainage and aeration and prevent soil compaction.
️ Activated charcoal (optional)
Helps in cleaning the substrate, prevents odor development, and maintains soil health over time.
The benefits of a professional Aroid mix
Perfect aeration
The roots get plenty of oxygen, just like in their natural habitat. This allows them to grow strong and healthy.
Excellent drainage
Excess water drains quickly, preventing root rot - the silent killer of houseplants.
Maintaining structure
The mix does not compact or settle over time. The airy structure is maintained for months and years.
Preventing diseases
A drier and better-aerated environment makes it difficult for fungi and pests to develop around the roots.
Lightweight
The pots are easier to move, and the roots spread easily through the light substrate.
Forgiving to mistakes
Even if you water a little too much, the excellent drainage prevents damage. The mix is forgiving of beginner mistakes.
When to switch to an Aroid mix?
If you have an Aroid plant in regular soil, here are the signs that you should switch to a special mix:
- 🟡 Yellowing leaves - Although you are not overwatering, the leaves are turning yellow. This can indicate root rot due to poor drainage.
- 🐌 Slow growth - The plant is barely putting out new leaves, even during the growing season.
- 🪨 Hard soil - The soil has compacted, and water stays on the surface rather than penetrating inside.
- 💀 Rotten roots - When you take the plant out of the pot, the roots are soft, brown, or black instead of white and strong.
- 🦟 Fungus gnats - Small flies buzzing around the soil - a sign of excessive moisture.
- 😷 Bad odor - The soil smells bad or musty.
How to switch to an Aroid mix?
Prepare the new pot
Choose a pot with good drainage holes. It is recommended to use a pot 2-3 cm larger than the current one.
Remove the plant carefully
Tilt the pot and remove the plant with the root ball. Be careful not to break the roots.
Clean the roots
Gently shake the old soil from the roots. If there are rotten roots (brown and soft), trim them with sharp, clean scissors.
Plant in the new mix
Put a layer of mix at the bottom of the pot, place the plant in the center, and fill around it with the Aroid mix. Do not pack it too tightly!
Water and place
Water well until the water comes out of the drainage holes. Place in a shaded area for a day or two until the plant recovers.
Important tips for watering in an Aroid mix
An Aroid mix drains faster than regular soil, so the watering method should change:
- 💧 Thorough watering - When you water, water until the water comes out of the drainage holes. This ensures that the entire substrate gets wet.
- 👆 Moisture check - Insert a finger 3-5 cm into the substrate. If it is dry - it is time to water. If it is still moist - wait a little longer.
- 📅 Higher frequency - Because of the rapid drainage, you may need to water more frequently than with regular soil.
- 🚫 Do not leave water in the saucer - Empty the saucer if water accumulates in it. Aroids do not like to sit in water!
FAQ
Can you make an Aroid mix at home?
Absolutely! You can mix coco-peat, perlite, and pine bark in a ratio of about 50:30:20. However, a professional ready-made mix ensures precise ratios and high-quality materials.
How often should the mix be changed?
It is recommended to change or refresh the mix every 1-2 years, or when the plant needs repotting into a larger pot. You can also replace just the top layer annually.
Is the mix suitable for all houseplants?
Aroid mix is specifically designed for plants from the Aroid family. For other plants like succulents, cacti, or plants that prefer moister soil, there are other, more suitable mixes.
Do I need to add fertilizer?
Yes! Aroid mix is a relatively nutrient-poor growing medium. It is recommended to fertilize with diluted liquid fertilizer every two to three weeks during the growing season (spring-summer).
Which is better - ready-made mix or making it myself?
A professional ready-made mix saves time and ensures precise ratios and high-quality raw materials. Making it yourself can be cost-effective if you have many plants, but requires purchasing several materials separately.
Summary
Using a specialized aroid soil mix is one of the most important steps you can take for your houseplants. The mix simulates the plants' natural growing conditions, provides perfect aeration and drainage, and prevents most common issues like root rot and fungi.
Investing in a high-quality mix is very worthwhile - your plants will be healthier, grow faster, and live for many more years. It is the best way to give your aroids what they truly need!
🌿 Written with a love for plants by the Deco Garden team 🌿