passive hydroponics

  • Kratky Method: 9-Step Setup Guide for Passive Hydroponic Growing

    ByFaisal Habib

    Home > Hydroponic Systems > Kratky Method: 9-Step Setup Guide for Passive Hydroponic Growing Last Updated: July 2026  |  Reviewed for horticultural and physiological accuracy Quick Answer: The Kratky Method is a passive, non-circulating hydroponic growing technique that requires zero electricity, water pumps, or air stones. By suspending plant crowns in a net pot above a sealed nutrient reservoir, roots absorb water and minerals from below while developing specialized aerial oxygen roots inside the humid air gap above the receding waterline. To prevent root suffocation, never top off a Kratky reservoir back to the net pot level halfway through the crop cycle. Calculate your starting reservoir concentration using our EC…

  • Kratky Method for Hydroponic Lettuce (No Pump, No Electricity)

    ByFaisal Habib

    Home » Hydroponics » Kratky Method for Hydroponic Lettuce (No Pump, No Electricity) Last Updated: August 08, 2026 | Reviewed for accuracy, clarity, and safety Quick Answer: In traditional active hydroponic systems (like DWC or NFT), water pumps or air stones continuously dissolve oxygen into the water. In the Kratky method, oxygen transfer occurs passively within the enclosed air gap. Relative humidity inside the sealed reservoir remains above 95%, preventing air roots from drying out while maintaining an aerobic environment that suppresses anaerobic pathogen proliferation. ⏱️ Time: 30 Minutes 💪 Difficulty: Beginner 💰 Est. Cost: $50 – $150 💡 Key Term The Kratky method for hydroponic lettuce is a non-electric…