Substrate Science
16 articles
Sterilizing Second-Hand Pots: Preventing Cross-Contamination in the Lab
Reusing containers is an economical, sustainable practice in indoor gardening, but second-hand pots are a primary…
Testing Soil pH and EC: The Slurry Test vs. Runoff Method
Managing root-zone chemistry is critical for indoor plant health. Two metrics govern root success: pH (which…
Biochar for Indoor Pots: Does it Actually Help with Nutrient Retention?
Biochar has generated significant interest among indoor growers looking for ways to boost fertility and keep…
Understanding Cation Exchange Capacity (CEC) in Indoor Soil Mixes
Cation Exchange Capacity (CEC) is a measure of how well your potting mix can hold onto…
Flushing Substrates: When and How to Remove Salt Buildup Indoors
Flushing a substrate means running a large volume of clean, low-concentration water through a container to…
Potting Up: Signs Your Indoor Plant is Root-Bound (And the Proper Way to Transplant)
Keeping an indoor plant in a container that is too small leads to a common condition…
Bottom Watering vs. Top Watering: Science-Based Benefits for Peat-Based Media
Peat moss forms the foundation of most commercial indoor potting mixes, but its unique physical properties…
Mycorrhizae in Containers: Do Fungal Inoculants Work Indoors?
Indoor growers frequently add commercial mycorrhizal fungi to potting soils and soilless containers expecting rapid root…
The Science of LECA: Why Clay Pebbles Are the “Gold Standard” for Indoor Roots
Lightweight Expanded Clay Aggregate (LECA) has earned a reputation as the gold standard for indoor root…
Self-Wicking Planters vs. Fabric Pots: Which is Better for Root Oxygenation?
Healthy roots depend on balancing water availability with oxygen supply. Without adequate dissolved oxygen and pore-space…
Coco Coir Buffering 101: Why You Must Pre-Treat Your Media with Cal-Mag
Failing to buffer raw coco coir with a calcium-magnesium (Cal-Mag) solution before planting will systematically starve…
Perlite vs. Vermiculite vs. Pumice: Choosing the Right Aeration for Your Pots
Selecting the wrong aeration amendment for indoor potting mixes directly causes root zone suffocation or chronic…