51:49

Alkalinity: Focus on the Water Alkalinity, Not the Water pH

42:20

Identfication of Nutrient Deficiencies (Greenhouse Plants)

1:11:29

e-GRO Webinar - Growing Lettuce and Culinary Herbs Hydroponically

1:17:55

Plant Health Pyramid

33:08

Getting Phosphorus Right: Optimizing Your Fertilization Strategy

43:41

Soils & Plant Nutrients Part 1

6:45

Focus on Alkalinity and Substrate pH

25:37

Managing Nutrient Solutions for Hydroponics Part 2