What is s/h or semi-hydro
s/h and semi-hydro are shortened terms for semi-hydroponics, a method of growing plants using a non-organic medium. Because it is not an ebb and flow method, it isn't true hydroponics. Common materials used as a growing medium are LECA (clay pellets), Aliflor, Primeagra, and sponge rock.
Probably the most common material is the clay pellets. The plant is planted in a container which has a reservoir, usually a plastic pot with holes approximately 1" up from the bottom of the pot on the side, or Misco or Misco-type self-watering pots. The clay pellets wick the moisture up so that the roots of the plant receive constant moisture without drowning it.
In preparation, the pellets are soaked prior to potting up. Some pellets are placed in a pot, tamped down by shaking the pot. The plant is then held over the pot with the roots about 1/3 to 1/2 down the pot. More pellets are placed in the pot. The plant is then watered. When the reservoir is emptied, the plant is watered again. Once a month the pot is flushed by running water through it to rid the pot of excess salts/fertilizers.
Image by: Lisa Quintana
Home made (L) and purchased s/h pot