Watering in Greenhouses / Tunnels
Overview:
Unlike outdoors, keeping plants grown under cover supplied with sufficient moisture to meet their needs can often be a daunting task, particularly in very hot weather, when they may need to be watered more than once per day.
Luckily there are a number of things that can be done to make this task easier.
Examples:
- Placing pots on capillary matting set in shallow trays part filled with water allows the plants to absorb water when they need it.
- Damping down the floor of the Greenhouse / Tunnel with water every morning will increase humidity and reduce drying out.
- Placing a bottomless carton or plant pot at the base of each plant at planting out time ensures the water gets down to where it is most needed.
- Idealy these containers want to be 0.5 -1 litre in size.
- Good shading and ventilation will also reduce rates of evaporation
- Investing in an automatic drip system with a built-in reservoir, should take care of most of the necessary plant irrigation required, particularly at holiday time, this system is particularly suited to potted plants.
- For plants planted out in the greenhouse / tunnel border laying a Leaking hose on the surface of the border allows water to trickle out onto and percolate down to the root system.
- Planting out at wider spacing can reduce the need for water, the closer plants are the more water they need.
Both of these systems could be connected to a water timer to give even more control.