How to Cool a Small Greenhouse - Krostrade

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How to Cool a Small Greenhouse

Tired of figuring out how to cool a small greenhouse when the temperature rises? The primary purpose of having a greenhouse is to protect crops from extreme heat and cold, as well as unwanted pests. However, as the days become hotter outside, the temperature inside your greenhouse could increase, too.

When left uncontrolled, this could lead to a low-quality crop and increases your plants’ susceptibility to insects and pests. It’s essential to make sure that the temperature inside your greenhouse remains stable. While some crops may survive the hot environment, others will surely wilt.

Read on to learn more about how you can cool your greenhouse.

How to Cool a Small Greenhouse

What Are Some Ways to Cool Your Greenhouse?

Naturally, the amount of cooling you need would depend on where you live. If you live in a place where it especially gets hot in the summer, then you need a robust system that will help lower the temperature in your greenhouse. But if you live in a place where the climate is colder, then you might do away with a simple ventilation system.


Passive Ventilation

Passive or natural ventilation is one of the most popular methods used in cool greenhouses. This is mainly because of the fact that it’s a low-cost method of cooling greenhouses.

You don’t have to use expensive equipment to get the air inside the greenhouse and maintain its temperature at desirable levels. All you need is a vent to draw the air in and out to keep the coolness of the environment inside.

Natural ventilation relies mostly on the wind pressure to push air in and out of the greenhouse. Essentially, the cooler air goes in through the vents and replaces the hot air.

The hot air, in turn, is pushed out of the greenhouse through another vent. This effectively lowers the temperature inside the greenhouse by a few degrees.

People commonly use two types of passive ventilation: roof and side-wall ventilation. According to experts, roof ventilation is five times more effective than side-wall ventilation. But both types can be used in one greenhouse to maximize the cooling effect.


Active Ventilation

Active ventilation is more expensive than passive or natural ventilation. It uses fans to facilitate cooling inside the greenhouse. They can either be structured so the air will circulate inside the greenhouse, or they can be installed so they can suck cold air in and push hot air to the outside.

For maximum effect, the air should be pulled through the full length of the greenhouse to avoid leaving hot air packets. To ensure just that, it’s recommended to place the fans on a higher surface of the greenhouse.

This is a more effective method than placing the fans on the lower part. Ideally, in places where the temperatures are hotter in the summer, the fans should be placed at least 10 feet up the greenhouse.

Active ventilation is essential when natural ventilation can no longer control the heat inside the greenhouse. However, it’s also important to remember that active ventilation can require higher overhead and maintenance costs. Be sure to consider these before installing active ventilation in your greenhouse.


Evaporative Cooling

Another method for cooling greenhouses is evaporative cooling. This is more complex compared to other methods of cooling small greenhouses.

Being that, it will also require more utility and maintenance costs. In this greenhouse cooling method, the heat in the air is used to evaporate the water in plants and other wet surfaces.

The most common type of evaporative method used is the fan and pad method. Here, the system uses a pump that soaks the cellulose pad with water. The fans situated on the opposite side of the cellulose pads pulls the air inside through wet cellulose pads, thus, cooling the environment inside the greenhouse. This lowers the greenhouse’s temperature by at least 10ºF to 20ºF.

The efficiency of the evaporative cooling method primarily depends on the area where you’re currently situated. However, this type of process works best in areas where the climate is drier and more humid. Evaporative cooling can also be used in addition to natural ventilation.


What Temperature is Considered Too Hot for Greenhouses?

Ideally, your greenhouse should have an internal temperature of 80 to 85 degrees Fahrenheit. But you should also take the types of plants you’re growing into consideration.

In general, anything above 90 degrees Fahrenheit is considered too hot and can be damaging to your crops. Even though plants, like tomatoes, won’t survive in such an environment.


Where Should You Set Up a Greenhouse?

If you live somewhere in North America, the best orientation for a greenhouse is south or southeast to allow your plants to get as much early morning sun as they can. You can also choose to go for the east-facing orientation, especially when a southern exposure causes some glazing to take place.


Can I Put a Greenhouse in the Shade?

Your greenhouse’s ideal site should be one that gets full sun. It would be much easier for you to find ways to provide shade for your greenhouse rather than to offer it with solar-intensity light. However, this doesn’t necessarily mean that a shady site for your greenhouse won’t work.


Learn How to Cool a Small Greenhouse and Enjoy Greater Yields

Now that you know a little bit more about how to cool a small greenhouse, you can expect to enjoy better yield and excellent quality crops. If your plants show any signs of heat stress such as wilting, scorched leaves, or drying foliage, reassess your greenhouse’s cooling system as it might not be working anymore, or some parts are damaged. Keep these greenhouse cooling tips in mind to prevent any damages in your plants from happening in the future.

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How to Start an Avocado Farm: 4 Things to Remember

How to Start an Avocado Farm: 4 Things to Remember

Are you interested to learn how to start an avocado farm? Embarking on this journey requires time, effort, and commitment. Plus, you need to consider a number of factors including soil preparation, as well as weather conditions.

You’re probably aware that avocado trees or Persea spp, are originally from Mexico. This explains why one of the famous Mexican cuisines include avocado-based guacamole.

You can choose to grow avocado trees indoors or outdoors. If you plan to grow them in a hobby greenhouse or at home, all you have to do is to sow the seeds in pots. When they’re grown outdoors, avocado trees can grow up to 40 feet. You can al

Moreover, these trees thrive well in regions where the weather is mostly warm and sunny. However, don’t expect them to grow in areas that experience extreme temperatures during the summer and winter.


Avocado: The Superfood

Did you know that the global demand for avocados has been steadily increasing? Aside from the fact that its fruit is known for its full, buttery flavor and rich texture, it’s also packed with loads of essential nutrients that are good for your body.

A single serving of avocado fruit contains vitamin K, vitamin C, folate, potassium, vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin E, manganese, magnesium, iron, copper, zinc, and vitamin A.  It also has protein, fiber, and healthy fats. If you’re on a low-carb plant food diet, you’d want to incorporate avocados into your diet.


What are the Growing Requirements of an Avocado Tree?

Since avocado trees need to be grown in warm semi-humid climates, they only grow in U.S. Department of Agriculture (USDA) plant hardiness zones 8 to 11. However, it’s important to note that while avocado trees may be grown in those zones, they don’t always thrive well in areas that get extremely hot during the summer or frosty, chilly, or snowy in the winter. This implies that the ideal environment for an avocado tree should have moderate temperatures all-year-round.


What are the 3 Primary Groups of Avocado Trees?

If you’re planning to start an avocado farm, you need to know the 3 main groups of avocado trees: Guatemalan, West Indian, and Mexican. Each type has its own ideal growing range.


Guatemalan Avocados

A Guatemalan avocado is known for its hard skin that features plenty of warts.


West Indian Avocados

This type of avocado tends to flourish in warm climates. Unlike the Guatemalan avocado, a West Indian avocado has thin and shiny skin and could weigh up to 5 pounds.


Mexican Avocados

A Mexican avocado thrives well in tropical highland areas. Compared to the other avocado groups, the Mexican avocado is more tolerant of cold weather. In fact, it can manage to survive even when temperatures drop to 26˚F.

Moreover, this type of avocado produces smaller fruit that weighs less than a single pound and its skin has a distinct papery-smoothness to it.


Expert Tips on How to Start an Avocado Farm

Unless you’re willing to take on a long-term project, spend a considerable amount of money on planting, and wait for a period of 3 to 5 years for your first harvest, don’t get into avocado farming. However, if you’re willing to go through the whole nine yards to enjoy top yields for many years, check out this guide:


Tip #1: Plant them in areas where the temperatures are consistently cool

Be sure to plant your avocado trees in cool temperatures that can range between 68˚F to 75˚F on a daily basis to avoid fruit drop. However, when they’re flowering, or when they’re starting to bear fruit, the humidity levels shouldn’t go below 50% at midday.


Tip #2: They don’t like wind

In case you’re not aware, avocado trees have brittle branches that easily snap off. For this reason, it’s best not to plant them in areas that are mostly windy because wind can cause considerable damage to their fruit.


Tip #3: Most of them need proper irrigation

If your avocados are rain-fed, they need to have at least 1,000 mm rainfall spread out throughout each year. Before their flowering season, avocado trees require a drier season that lasts for about 2 months. On a weekly basis, avocado trees need about 25 mm water.

It’s extremely important to test the quality of irrigation water because if its pH and bicarbonates are really high, they trigger a build-up of free lime in the soil. You also need to remember that high levels of sodium and chloride can have a negative impact on your avocado plants.

Since the plant’s roots are shallow, the ideal way to apply water is via a micro-sprinkler or drip. This ensures an even distribution throughout the avocado tree’s root area.

Moreover, proper moisture control needs to be ensured in the root zone because this area tends to easily dry up.


Tip #4: Determine the soil’s suitability and prepare it accordingly

You can’t just plant an avocado seed on soil that hasn’t been prepared accordingly. To prepare the soil for planting, you need to dig soil profile pits throughout your farm. Make sure that the pits are 1.5 m deep.

Only a single put per ha is required. However, you need to dig more pits if the location is non-homogenous or hilly. Check the color of the soil, its texture, structure, patches, sitting water, concretions, hardpans, stones, and gravel.



Grow Your Avocado Trees in a Hobby Greenhouse!

Since avocado trees require specific levels of temperature and humidity, you’ll find it easier to grow them in a hobby greenhouse. The enclosed space allows you to customize the environment to meet the needs of your plants. What’s more, it protects them from strong winds and the constant threat of pests.

Learning how to start an avocado farm outdoors is great, but growing them inside a hobby greenhouse is even better.



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