The Kratky method: passive hydroponics without a pump
Kratky growing suspends a plant above a static nutrient reservoir. As the level falls, an air gap forms and part of the root mass takes oxygen from it.
Compare passive jars, aerated reservoirs, channels, drippers, flood tables and towers by their real maintenance and failure points.
Kratky growing suspends a plant above a static nutrient reservoir. As the level falls, an air gap forms and part of the root mass takes oxygen from it.
Deep water culture keeps roots in nutrient solution while an air pump and air stone add circulation and oxygen. It is simple, productive and dependent on continuous power.
Nutrient film technique runs a shallow, continuous film of solution through slightly sloping channels. It suits leafy crops with modest root systems and demands reliable flow.
Ebb and flow periodically floods a tray of pots, then drains back to a reservoir. It gives roots alternating access to solution and air and handles larger media-filled plants.
A wick draws nutrient solution into an absorbent growing medium. It has no pump and suits small herbs, but it cannot move enough water for thirsty, fruiting crops.
Dutch buckets drip-feed individual media-filled pots and return the drainage to a reservoir. They suit large fruiting plants because each root zone has room and can be accessed separately.
Aeroponics mists bare roots in a closed chamber. It can deliver excellent aeration, but blocked nozzles or pump failure give roots very little buffer time.
A tower saves floor area but not light, access or maintenance. It works best for compact leaves and herbs when every planting pocket receives usable light.
Drip systems deliver measured solution to each pot through small emitters. They scale well from herbs to tomatoes, provided distribution and drainage are checked.