Kratky method hydroponics was developed by Bernard Kratky (full article - see link below), a researcher at the University of Hawaii in the 1990s. The non-recirculating hydroponic Kratky method does not require pumps, electricity, or wicks. Instead, plants grow in a netted pot containing a growing medium atop a “raft” that is fixed to the top of a small container or tank and filled with nutrient solution. As the plant grows, the nutrient solution level decreases to allow for air space. During the class, participants will assemble their own 20 gallon system and review how to fill and maintain it once the tub is placed in it's final location. We will have a fully filled and operational system ready to view the day of the training.

Below is a link to a playlist of 5 videos to watch ahead of time that show the system set up.
For more information from Gerry about the systems, see the Hydroponics link below.

Instructor: Gerardo (Gerry) Spinelli is the Production Horticulture Advisor serving the Nursery and Floriculture industry in San Diego. Gerry conducts applied research, extension, and education to improve viability and profitability of the Nursery and Floriculture industry, while conserving natural resources and complying with regulations. His program focuses on water and nitrogen management in horticultural container production, hydroponics, and greenhouses.