Editing Hydroponics (section)

===Passive sub-irrigation===
{{Main|Passive hydroponics}}
[[File:Water-cultivate a crocus.jpg|thumb|upright|[[Water plant]]-cultivated [[crocus]]]]
Passive sub-irrigation, also known as passive hydroponics, semi-hydroponics, or ''hydroculture'',<ref>{{Cite news|url=https://www.agriculturelandusa.com/2024/02/Hydroponic-farming.html|title=Hydroponic Farming: How to Grow Plants Without Soil|work=Agriculture land usa|access-date=Feb 13, 2024|language=en-GB}}</ref> is a method wherein plants are grown in an [[Chemically inert|inert]] [[porous]] medium that moves water and fertilizer to the roots by [[capillary action]] from a separate reservoir as necessary, reducing labor and providing a constant supply of water to the roots. In the simplest method, the pot sits in a shallow solution of fertilizer and water or on a capillary mat saturated with nutrient solution. The various hydroponic media available, such as [[ex-clay|expanded clay]] and [[Coir|coconut husk]], contain more air space than more traditional potting mixes, delivering increased oxygen to the roots, which is important in [[epiphyte|epiphytic]] plants such as [[Orchidaceae|orchids]] and [[Bromeliaceae|bromeliads]], whose roots are exposed to the air in nature. Additional advantages of passive hydroponics are the reduction of root rot.{{fact|date=March 2025}}