Effective watering is crucial to the success of greenhouse gardening. Whether you are growing in containers or raised beds, there are specific rules to follow: First, it is important to water early in the morning or late in the evening, to avoid the heat of the day. Second, it is important to avoid wetting the foliage and to direct the moisture to the roots. Wet leaves can create fungus that can spread to other plants. To avoid watering the leaves, use a dripper system or watering wand.
Third, it is important to water deeply; let the water saturate at least 4 inches, which allows the roots to chase the water and effectively anchor the plants in the soil. Fourth, plants in a container will need more water than raised beds. It is important to water the container slowly until water begins to run out the bottom. Fifth, over-watering and under-watering are both bad. If you notice any wilting, the plant needs water. If the leaves are yellowing, the plant is getting too much water. An easy test to do is the fingertip test: insert your finger in the soil, 2 to 3 inches, and if you feel moisture, you are okay.
Finally, consider investing in an irrigation system. The two most utilized methods are dripper hose systems or drip head irrigation. Soaker hoses allow the water to slowly soak, deeply into your boxes and containers, where as dripper heads can be placed directly at the base of your plants. Both systems can be put on timers for “no brainer” watering and both methods will save on your water bill.
In conclusion, following these watering rules will help ensure the success of your hoop house gardening: remember to water early in the morning or late in the evening, avoid wetting the foliage, water deeply, and consider investing in an irrigation system.