Best Soil Mix for Indoor Plants (And How to Make Your Own)
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If your plants aren’t thriving, the problem might not be your watering or lighting. it could be your soil.
Most indoor plants don’t do well in standard potting mix. It holds too much moisture and doesn’t allow roots to breathe properly.
The right soil mix makes a huge difference in growth, root health, and overall plant success.
Why Regular Potting Soil Isn’t Enough
Standard potting mix is designed to retain water.
That sounds good, but for most indoor plants, it leads to problems.
Common issues:
- Roots staying too wet
- Poor airflow
- Increased risk of root rot
This is especially risky for plants like aroids, which most indoor plants are.
What Makes a Good Indoor Plant Soil Mix?
A proper mix should be:
1. Well-draining
Water should pass through easily.
2. Aerated
Roots need oxygen, not compacted soil.
3. Moisture-balanced
Holds some moisture, but doesn’t stay wet.
The Ideal Soil Mix Recipe
Here’s a simple, effective mix you can use for most indoor plants:
- 40% high-quality potting mix (if you don't want to make the entire thing from scratch)
- 30% perlite
- 20% orchid bark
- 10% activated charcoal (optional but heaps with filtration of bad stuff)
This creates a chunky, breathable mix that most indoor plants thrive in.
Adjusting for Different Plants
Not all plants want the exact same mix.
Aroids (Monstera, Philodendron, Anthurium)
- Prefer chunkier, airy mixes
- Increase bark and perlite
Alocasia
- Slightly more moisture retention
- Keep some finer material
- Don't mind being a bit more on the pot bound side of things
Beginner plants (e.g. pothos, peace lilies)
- Can tolerate denser mixes
- Still benefit from added perlite
Signs Your Soil Is the Problem
- Water sitting on top of the soil
- Soil staying wet for too long (more than 3-4 days)
- Slow or no growth
- Yellowing leaves without obvious cause
If you’re seeing these, your soil is likely holding your plant back.
When to Repot
The best time to upgrade your soil is:
- When roots outgrow the pot
- When soil becomes compacted
- When a plant is struggling
Avoid repotting during stress (extreme heat/cold, immediately after receiving it in the mail).
Final Thoughts
If you fix your soil, you solve half of your plant problems.
It’s one of the simplest upgrades you can make but one of the most impactful.
You don't NEED to make a mix from scratch, it comes down to your preferences and requirements. But even a "premium" mix you buy from a store could typically do with some additions.