How To Make An ABG Soil Mix

ABG (Atlanta Botanical Gardens) mix is a popular substrate for bioactive enclosures, especially for dart frogs, geckos, and other high-humidity reptiles and amphibians. It promotes plant growth, holds moisture well, and supports microfauna like springtails and isopods.

Ingredients for ABG Mix

A standard ABG mix consists of:

• 40% Tree Fern Fiber or Coco Husk Chips– Provides aeration and prevents compaction.

• 20% Sphagnum Moss– Retains moisture and encourages plant root growth.

• 20% Orchid Bark (Fine or Medium Grade)– Adds structure and aeration.

• 10% Charcoal (Horticultural Grade)– Helps with drainage and prevents mold buildup.

• 10% Peat Moss or Coco Coir– Adds organic material for plant growth and moisture retention.

Instructions

1. Measure the Ingredients– Using the percentages above, mix the appropriate amounts based on how much substrate you need.

2. Mix Thoroughly– Combine all ingredients in a large container or tub to ensure an even mix.

3. Moisture Check– Lightly dampen the mix before using it in a terrarium to activate beneficial microbes and prevent excessive dryness.

Optional Additions

• Leaf Litter– Provides extra organic material for microfauna.

• Earthworm Castings– A natural fertilizer for plant growth.

• Sand– If you want additional aeration, but not required.

This mix works well for high-humidity enclosures and bioactive setups.