Let’s think about how the average soil gardener waters their plants. Usually every few days they dump a good amount of water into their soil, ensuring good penetration into the soil so the roots can suck it up.
A large amount of water simply seeps further into the ground and some evaporate out of the soil.
Only a small percentage of water is actually used by the plant. Hydroponics solves this problem by using what is called a recirculating nutrient reservoir in most types of systems.
What this means that a plant’s roots will only take up the amount of water they need at any one time and leave the rest in the reservoir for later. The reservoir is covered to prevent evaporation and no water can seep out of the bottom.
This allows the same amount of water that was used to water a plant in soil for a day to water a plant in a hydroponics setup for days or weeks at a time. You can save around 90% of the water used in soil gardening simply by switching to a hydroponic setup.
You can save around 90% of the water used in soil gardening simply by switching to a hydroponic setup.