How to Winterize a Winterize Greenhouse Ready for Winter


Is Your Greenhouse Ready?

When the outside temperatures begin to drop and the winter winds blow colder you know that winter is just around the corner.

This is the perfect time to winterize your greenhouse to protect your plants and flowers from extreme temperatures.

If you want to do it but don’t know where to start, keep reading to know more about my easy-to-follow guide to winterizing your greenhouse.

Help your greenhouse survive the winter and make sure your plants get through the winter whatever weather lies ahead.

Do an Inspection and Make Repairs

One of the most important aspects of winterizing a greenhouse is to keep the cold air out and prevent the warm air inside from leaking. Air gaps are the most common reason for major heat loss, even the smallest gap can welcome cold air to the place.

Make an inspection of the whole greenhouse perimeter and check if there are any gaps, cracks, or holes in the covering material. Caulk any opening, gaps, as well as around the windows.  If the gap is too large apply foam sealant.

Besides keeping the warm air inside, caulking also keeps out the pest. If the damage is major, the best option is to replace some parts, consider this as an investment, it will save you money in the long run and prevent you from doing emergency repairs after a winter storm.

In addition to this, lubricate all the parts of the place that move such as the door handles, vents, and hinges. This ensures that they will keep working effectively once the temperature drops.

Ensure that the windows and doors close securely to prevent the winter winds and moisture to affect your greenhouse.

Clean and Organize the Interior

Clean your space and organize to take advantage of the winter light transmission. Remove all the plants from the greenhouse, wash out all the empty planters with a cleaner and disinfect to kick out the existent pests and prevent more from appearing and infesting other plants.

Give all the structure a good scrubbing with disinfectant or diluted bleach, and dishwasher detergent for the covering. Use a diluted wood soap oil to clean the wood and ease out the dirt trapped in difficult places by using a plastic card or a plastic plant label.

Inspect all the plants before bringing them back into the greenhouse and when looking to organize them determine which are the warmest parts of the greenhouse to locate the plants there.

Also, identify the coldest areas so you can isolate the plants located there.

It is important to clean your greenhouse from top to bottom to remove all the traces of dirt, bacteria, mold, pests, and diseases. It does take a little preparation but the results are totally worth it and you will be ready for a successful winter season.

Make Sure the Warm Air Circulates Properly

You have already made the warm air keep inside the greenhouse but does this mean that it is circulating properly? Not really and without proper air ventilation all the hard work you’ve been doing to keep the heat will be worth nothing. Add a circulating fan to move the heat through all the greenhouse, you can add a second one if the space is too large. Set them at a low-speed setting to provide an appropriate airflow through the place. These fans need to be regularly cleaned and receive maintenance to ensure they provide effective air ventilation.

Besides increasing the airflow, circulating fans also prevent moisture buildup in leaves, minimizes mildew, and ensures the plant respiration keeps strong in extreme temperature.

Use an Integrated Heating System

A heating system plays a major role in helping your plants survive during the coldest months, this is why you need to give it a test before relying on it and check the accuracy of the thermostat by comparing it with a good thermometer.

The heater needs to receive regular maintenance and get cleaned to ensure it provides a great heat output. Also, check if it has enough power to heat your entire greenhouse.

If you can, have a backup electric heater, it will be useful in case your primary one broke down due to a storm or power outage.  You can maximize the performance of the heater by using planters filled with soil or taping translucent bubble wraps to the windows and ceilings of the place.

These effective tips can help to reduce heating costs while keeping the greenhouse warm.

Proper Water Management

Overwatering your plants is never a good idea but it is even worst to do it during cold months because it increases the risk of moisture buildup in the plants.

Disconnect and drain those water lines that are at risk of freezing, remove sediment, and reset water pressure.

Perform regular water system maintenance and clean the filters as well as the screens. Insulate the water pipes to retain heat and reduce condensation.