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Step 1: Importance of Temperature

  • Proper Ambient Temperature   0:33
  • Why it is important     0:54
  • Proper Water Temperature for your plants  2:39
  • What is Thermal Shock and how it can affect your plants   3:18
  • Why you want to avoid Temperature fluctuations    4:20

In this video, we'll explore the perfect ambient and water temperatures that plants crave. We'll uncover the true importance of temperature and why it's crucial to steer clear of extreme temperature changes. So, let's dive right in! 

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If you want your garden to thrive, there are three key factors to keep in mind when deciding where to locate it. 

These factors are: 

One of the most important factors to consider is ambient temperature. 

Plants thrive in a specific temperature range. You want your room temperature to fall inbetween these temperatures at all times

Photosynthesis is a process by which plants use sunlight to produce their own food, and it is dependent on a range of environmental factors, including temperature. 

Temperature plays a critical role in plant growth and development, as it affects the metabolic processes that occur within the plant. 

These processes include photosynthesis, the uptake of nutrients, and the production of enzymes that aid in growth and development.

When the ambient temperature consistently remains below the optimal range for plant growth and development, which is typically between 18-26 degrees Celsius (65-80 degrees Fahrenheit), the plant's metabolism slows down, and its ability to photosynthesize is reduced. 

This means that the plant is not able to produce enough energy to sustain healthy growth and development.

At temperatures below the optimal range, the plant's metabolism slows down, and their ability to take up and use nutrients effectively is reduced. 

This can lead to stunted growth, delayed development, and reduced crop yield. Additionally, low temperatures can also damage plant cells and cause them to die, leading to plant death.

On the other hand, if the ambient temperature is consistently too high, it can also have negative effects on plant growth and development. 

High temperatures can lead to the denaturation of enzymes within the plant, which can affect their ability to carry out essential metabolic processes.

High temperatures can also cause the plant to lose moisture rapidly through transpiration, leading to wilting and scorching of the leaves.

Ambient Temperature

Water Temperature

Another crucial aspect to consider is the water temperature. 

The water in your hydroponic system needs to be kept at a specific temperature to ensure that the plants can absorb nutrients and grow properly. 

The optimal water temperature range for most plants is between 18-23 degrees Celsius.

Placing a hydroponic system directly on concrete or any other cold, hard surface can cause a phenomenon called "thermal shock." This is because concrete and similar materials have a high thermal conductivity, meaning they can rapidly transfer heat away from the water in the system. As a result, the water can become too cold, too quickly, which can be damaging to the plants.

When the water temperature drops too low, the plant's metabolic processes slow down, and nutrient uptake can be disrupted. This can lead to stunted growth, wilting, and even death in extreme cases. Cold water can also increase the risk of root rot and other diseases, which can further harm the plants.

To prevent thermal shock and maintain a consistent water temperature between 16-22 degrees celsius, it's recommended to place your hydroponic system on a level surface that is not directly in contact with cold materials like concrete. You can also insulate the base of the system or use a mat or other material to create a barrier between the system and the floor.

By taking steps to maintain the proper water temperature, you can help ensure the health and success of your hydroponic garden.

Cold Water Temperature

Extremely cold water can stunt plant growth in hydroponics because it slows down the plants' metabolic processes. When plants are exposed to very cold water, their roots become less active, and they absorb fewer nutrients. This can result in slower growth, smaller yields, and weaker plants that are more susceptible to diseases and pests.

Furthermore, cold water can cause stress to the plants, which can also impact their growth. In response to the stress, plants may produce less chlorophyll, which can cause leaves to yellow and stunt overall growth.

Overall, it's important to maintain a consistent water temperature in hydroponic systems to ensure optimal plant growth and health.

 Avoid temperature fluctuations

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Extreme fluctuations in ambient temperature and water availability can be harmful to plants because they disrupt the plant's ability to maintain homeostasis, which is the stable internal environment necessary for healthy growth and development.


When ambient temperature fluctuates greatly, plants may struggle to regulate their internal temperature, leading to stress and damage to the plant's cells.

IN ADDITION Extreme fluctuations in water TEMPERATURE also affect the plant's ability to absorb nutrients, leading to nutrient imbalances and deficiencies. This can ultimately lead to reduced growth and yield, as well as increased susceptibility to disease and pests.

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Overall, plants thrive in stable environments with consistent air and water temperatures , and extreme fluctuations or temperatures to low or to high  can be detrimental to their health and productivity.