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.
Rock Dust for Cannabis: What It Can and Cannot Do
Rock dust is crushed stone sold as a mineral boost. See what Extension guidance says about it for cannabis beds and why a soil test comes first.
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.
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
Bat Guano for Cannabis: High-N vs High-P Guano
Bat guano cannabis guide: why some guano is high in nitrogen and some in phosphorus, typical analyses, and how growers use it in soil or as a tea.
Kelp for Cannabis: Kelp Meal and Seaweed Extract
Kelp for cannabis explained: how kelp meal differs from liquid seaweed extract, its mild nutrient analysis, and what growers can expect from kelp in soil.
Garden Lime for Cannabis: Raising Soil pH
Garden lime raises acidic soil pH for outdoor cannabis. Learn why a soil test comes first and how far ahead growers apply it.