Greensand for Cannabis: Potassium Source or Soil Conditioner?
Greensand is a marine mineral sold as organic potassium. Rutgers soil scientists rate it as a soil conditioner first. See where it fits in cannabis beds.
Feather Meal for Cannabis: Nitrogen Content and Use
Feather meal gives cannabis a slow, steady nitrogen supply. See its typical analysis, how fast it releases, how much to mix in and when to use it.
Rock Phosphate for Cannabis: A Slow Phosphorus Source for Acidic Soil
Rock phosphate is a mined mineral that releases phosphorus over several years. See its analysis and why soil pH decides whether it pays off.
Cation Exchange Capacity: What CEC Means for Cannabis Growers
CEC tells you how well soil or a mix holds nutrients for cannabis roots. Learn what it means, how coco, peat and sand compare and how to use it.
Chelated Micronutrients for Cannabis: How Chelates Work
Chelated micronutrients keep iron available to cannabis roots. Learn how chelates work, which ones hold up at high pH and when they really help.
When to Start Feeding Cannabis Seedlings (Guide)
When to start feeding cannabis seedlings depends mostly on what they are growing in. A seedling in a bagged seed-starting
Slow Release Fertilizer for Cannabis: How It Works
Slow release fertilizer for cannabis feeds plants a little at a time instead of all at once. That can mean
How to Read a Fertilizer Label: NPK Numbers Explained
Knowing how to read a fertilizer label saves money and prevents overfeeding. Every bag or bottle sold as fertilizer carries
How to Lower Soil pH for Cannabis with Sulfur
Lowering soil pH for cannabis is a slow job, and that is the first thing to plan around. Most garden