Do you know of anyone in New Zealand commercially growing lettuce using organic hydroponics?
No, there is no certified organic hydroponic lettuce available.
Some growers may grow lettuce hydroponically and don't use for example
sprays and then call them organic, but it is really a contradiction in
terms. Organics is about feeding the soil, keeping the soil healthy. The
soil is the foundation for plant and animal and human health. The soil
acts as a buffer for any drastic changes, such as incoming diseases or
insect pests etc. A hydroponic system is highly vulnerable and is lacking the stabilising effect of a real, living soil, even if it may use comfrey and nettle teas for