Part 1: Propagation by seed

5. Irrigation

A large sprinkler irrigating a field of crops

A water sprinkler laid between lines of crops.

Seedlings are very susceptible to drought because they start life with very small root systems and so a reliable watering system is essential. Many systems can be set up on a timer, or even with a sensor to automatically water when compost dries out to a certain level.

Standing sprinklers	Water is supplied through either fixed or moveable hoses to a number of moveable sprinklers on stands. Controlled by taps.
Overhead sprinklers	Many sprinklers are fixed in lines over the growing area. Water is supplied through fixed hoses and controlled by taps.
Capillary bed	Sand bed is tanked and fills with water to just below the sand surface level. Plants soak up water through capillary action. Automatic ball-cock system keeps the bed full at all times.
Flood irrigation	Beds are tanked with or without sand in base. Beds are flooded for a period of time until plants soak up water then drained. Water is recycled back into a tank.
Drip irrigation	A nozzle is put into every plant container. Water drips through each nozzle. Water is supplied by fixed or moveable hoses and controlled by taps and timers.
Hydroponics	Plant roots are continuously submerged in water. Water is often recycled. Water is oxygenated so that plant roots can survive being. submerged.
Hand watering	Suitable for a home system, plants are watered with a can or hose pipe.