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Getting 100,000+ Miles Out of Your Greenhouse!

Greenhouse MaintenanceThere is something about growing in a greenhouse that is very satisfying. Maybe it is all of that oxygen? Or is it the satisfaction of working with your beloved plants on the most inclement days? Maybe it is the great jump-start you can get on your outdoor garden or is it the diverse variety of plants you are able to grow? For me personally, it is the vine-ripened tomatoes for the holidays and throughout the winter!

A greenhouse is a substantial investment. If well maintained, your greenhouse will provide you with a lifetime of enjoyment and satisfaction. Think of your greenhouse like a fine automobile. Only a fool would drive a car off the lot and think that it would last without performing some routine maintenance.   The same goes for your greenhouse. In order to get the most “miles” possible out of your structure, follow these easy steps to prevent breakdowns.


Tighten loose boltsThere is nothing quite like working in a greenhouse while it is raining or snowing. It is enchanting and therapeutic to say the least. To ensure that your magical hideaway stays nice and cozy and doesn’t turn into a house of horror, do some routine tire-kicking. Take a thorough walk around your greenhouse daily—or at least weekly. Keep your eye open for any loose, worn or rusted screws or bolts. It is not uncommon for bolts and screws to work their way loose. A greenhouse develops its own “rhythm” with the vibrations created from fans, pumps, lights and wind. This vibration can cause hardware to loosen over time. If you have a persistent problem, try utilizing lock washers or elastic nuts or even some Lock-Tite in areas of high vibration. Watch for excess water flow around your greenhouse. Possible causes of excess water flow could be from gutters not directed properly or at all, poor soil drainage, or being downhill of an area prone to runoff. These and other water issues can possibly undermine your footings or wash into your structure.


Whether your greenhouse is covered with glass, poly film or polycarbonate you need to make routine inspections of your glazing. Pay close attention to corners, seams and previously repaired areas.  This should be a detailed inspection. It only takes one area to come loose in a high wind and you could be chasing your greenhouse skin all over the county. Watch for tears, loose screws and any cracked or missing sheets of polycarbonate. Pay close attention to the areas where the covering is attached. Most glazing options will require replacement after a number of years, but the untimely removal of one’s greenhouse covering is never fun!

Inspect your gutters and doors. Gutters often need to be cleaned and re-caulked to prevent leaks and your doors will need adjusting. Doors that seal properly will save you money on heating. Gutters that don’t leak prevent excess moisture and disease problems within your growing environment.

Drive Train

Greenhouse Lighting

The sun is the ultimate motor providing energy and warmth to grow successfully all year round.  However you still need water, some additional heat in the northern regions and supplemental lighting if you want to grow tomatoes in the winter.  Send in your water for analysis at least annually. Watch for high pH (most plants prefer 5.8 to 6.2 pH) and “heavy metals.”  Acid injection can often eliminate both problems and provide you with a more consistent, productive crop. If you happen to grow in an area with low pH, you may need to supplement your irrigation water with sodium bicarbonate (baking soda) to reach your desired pH level.

If you want to grow fruiting crops in the winter months, you will need to extend the daylight hours to beyond 12 hours per day.  We currently do this with 1,000 watt metal halide grow lights but will soon be making the transition to LED grow lights. LED grow lights will revolutionize how growers are lighting their crops. Until then, simply clean the bulbs with a soft cloth, dust the ballasts off and ensure that you are getting complete coverage from your lights. The best time to take a look at your lighting system to inspect for consistent coverage is in the dark.

Exhaust System

Greenhouse ventilationGood airflow in your greenhouse helps control fungal diseases, aids in pollination and helps you grow a more consistent crop. In our greenhouse we accomplish this with H.A.F. (Horizontal Air Flow) fans. These fans aren’t for cooling; they simply move the air around.  To help keep the crop cool we use roof and end wall vents, an evaporative cooling system and large exhaust fans to draw the cool air from the evaporative cooling pads across the greenhouse. All of these fans need to be inspected at least annually. To inspect, first DISCONNECT POWER. Check for loose or worn belts, clean fan blades and tighten or replace any screws that may have vibrated loose. Evaporative cooling pads should be cleaned and disinfected to optimize airflow and minimize fungus growth.


Greenhouse HeaterAs the days get shorter (and colder) it is time to think about getting your greenhouse ready for winter. It’s already cold in many places and the official start of winter is less than a month away, so no time like the present. A lot of times, the company that you purchase your propane or natural gas from will look at your heater for no charge or a nominal fee. Don’t be fooled into thinking that just because everything was fine when you shut your heater down in the spring, it is good to go now. It is always recommended to have a professional check your heater for proper operation prior to you needing it.  Do a “test run” and replace any part that is not functioning properly.  Clean your heater thoroughly and oil any moving parts according to the manufacturer’s recommendations. Or upgrade. Now with efficiency ratings up to 93%, you will indeed get the most BTUs for your dollar.

Keeping the heat down at the plant level helps you save big on your heating bills. Why pay to heat the air above your plants when you don’t have to?  Insulate north-facing and any other solid walls with TekFoilTM Relective Insulation. Cover any unused fans-inside and out, if possible.


Just like your automobile, your greenhouse needs periodic maintenance to keep operating at maximum efficiency. Protect your investment by taking care of small problems before they become large problems.

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