Greenhouse Watering Mistakes to Avoid

If your home garden contains a greenhouse, you should know some greenhouse watering mistakes to avoid. Greenhouses are ideal when you want to grow delicate plants that need to be secured during the early growth phase. You may also need to establish a greenhouse if your region has an extremely dry or cold climate. Below are some common greenhouse watering mistakes and ways you can avoid them.


Many people give plants more water when they observe that leaves are wilting. Overwatering greenhouse plants is more of a problem if you live in a dry climate. While more water can be a good thing for plants in the outside garden, more water is often not effective for greenhouse gardening. A greenhouse, being a closed system, will generally utilize less water than an outside garden.

The key is to know when to water and how much water to apply. Check the soil before you apply water to the plants. Avoid giving water when you observe the plant leaves wilting. This is not a stable indicator of a plant's water needs. Generally, when the soil is dry and the air in the greenhouse is hot, you should proceed to water the plants.

Unless you have seedlings, give the plants minimal water on cool, cloudy days. Do your watering in the morning to avoid greenhouse misting, especially in the evening, a practice which can cause diseases.

Using High-Pressure Watering Mechanisms

Some of the drip systems and misters used in greenhouse gardening involve high pressure during water application. When the force of water is quite high, it can damage seedlings and young plants. Injured plants are more susceptible to disease attacks. Their stems can also be broken, resulting in plant death.

Apply water through hand watering. Use either a garden hose or a watering can. If using a hose, make sure you get a good hose nozzle that will enable safe and effective water application. Whichever watering mechanism you choose, check that the water comes out with the pressure of gentle rain. This pressure is best for the plants.

Applying Water onto Leaves

Greenhouse irrigation waters the soil rather than the plants. The plants subsequently absorb water from the soil and utilize it for making food and other processes. It is best if you avoid water getting onto the leaves during watering procedures.

About once a month, you can apply water to the plant leaves to wash off dust and other dirt that may have accumulated.

Using a Poor Quality of Water

Sometimes, water used in greenhouse watering may contain pollutants or a high content of salts or minerals. Some people soften hard water, which is high in minerals. However, water that has been artificially softened is not good for plant growth.

Water softeners increase the content of sodium in the soil. The increase in sodium impacts the soil structure negatively. It also results in poor drainage of soils. When doing your greenhouse watering, avoid using water that has undergone a water softening procedure.