The Best Soil Mixes for Indoor Plants (+ DIY Recipes)

December 2, 2025

The Edit

The Ultimate Guide to Potting Mix

The secret to a thriving indoor jungle isn't just watering—it's the substrate. Learn how to mix the perfect soil for every plant in your collection.

Standard bagged potting soil is often too dense for delicate houseplant roots, leading to suffocated root systems and rot. To unlock maximum growth, you need to provide a custom-tailored environment that mimics a plant's natural habitat. Whether you are repotting a Monstera or a tiny succulent, the right mix is your most powerful tool.

The Anatomy of a Great Mix

1. The Base
Moisture Retention

Peat Moss or Coco Coir. This holds water and nutrients like a sponge.

2. Aerators
Drainage & Airflow

Perlite, Pumice, or Sand. Creates air pockets so roots can breathe.

3. Chunk
Long-term Structure

Orchid Bark or Charcoal. Prevents the mix from compacting over time.

Houseplant DIY Recipes

The Universal Mix

Best for: Pothos, Ferns, Peace Lilies, and Spider Plants.

2 Parts Coco Coir or Potting Soil
1 Part Perlite (for drainage)
1/2 Part Worm Castings (for natural nutrition)

The Chunky Aroid Mix

Best for: Monstera, Philodendron, Alocasia, and ZZ Plants.

1 Part Coco Coir
1 Part Orchid Bark or Coco Chips
1 Part Perlite or Pumice
1/2 Part Horticultural Charcoal

The Gritty Desert Mix

Best for: Cacti, Succulents, Aloe, and Snake Plants.

1 Part Succulent Potting Mix
1 Part Perlite
1 Part Coarse Sand or Grit

Why DIY Soil?

Prevents Root Rot: The #1 killer of houseplants. Adding aerators prevents waterlogging.
Maximises Aeration: Allows roots to "breathe" and grow significantly larger.
Cost-Effective: Buying base ingredients in bulk is cheaper than specialized pre-mixes.
Tailored Nutrition: You control the slow-release fertilizer levels.