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The Difference Between Indoor and Outdoor Hydroponic Systems

Hydroponics - Hydroponics is a method of growing plants in nutrient-rich water, without soil. Hydroponic systems can be used indoors, outdoors, or as a combination of the two. However, sufficient light must be provided indoors. If the natural sunlight is not adequate, special plant lights can provide additional light.

Sufficient humidity is also important. Make sure you know how much water your system needs during your setup time and how much you will need for watering and nutrient replacement during the growing season.  

Indoor hydroponics

Indoor hydroponics is especially useful for small spaces. Indoor hydroponic systems can be placed anywhere that receives adequate light and is free of pests and rodents.

When you install the hydroponic system indoors , make sure to provide your plants with enough light. This can be done with the use of special plant lights which will increase the amount of light that reaches the plant. 

You can also provide indirect light by placing a lamp or grow bulb close to the plants, but do not place them too close as this could cause problems.

When your small-scale operation is producing more than one crop at a time, it is important to ensure that you have sufficient ventilation for all of the crops. If you notice any dampness on the floor, you should remove it immediately and re-evaluate your ventilation strategy and you also need to ensure that there is sufficient space between each of your crops to ensure that they do not compete for water and nutrients.

Outdoor hydroponics

For outdoor systems, it is important that there is sufficient sunlight during the day so that photosynthesis can take place, but at night it is important to use only artificial light sources such as fluorescent lights or ultraviolet lamps. Because too much sun can burn leaves and buds. And always check that there are no dead branches or twigs blocking the light – they will impact on plant growth.

There is no need for additional humidity as long as there is enough water. The plants will still remain healthy with the proper amount of water and sunlight. 

Unlike indoor soil-based systems, the plants in an outdoor hydroponic system do not need to be watered as often as they would if they were grown in a soil-based system. 

It is important that the plant roots are not exposed to continuous flooding from the reservoir that contains the water used for growing. However, it is also important that the plants are not under too much stress from lack of water as well as from heat due to lack of shade. 

The plants should be thoroughly watered but also left enough time between watering so that their roots can develop properly.


There are two general types of hydroponic systems:

  • Indoor systems are used in places with available light, such as greenhouses, hothouses, or raised beds.
  • Outdoor systems are for areas where no artificial lights can be used. For example, if you have an apartment or home with a deck or patio, the system would be outdoors.

If you plan to use an indoor system, it is important to provide sufficient light to provide all the plants with adequate light requirements. However, it is also important to ensure that no lights are directly on the plants during the flowering period. This is because too much light can cause damage to the plants or cause them to grow too fast. If lights are not on during flowering periods, it is important to provide plants with plenty of fresh air, especially in winter months when there is less sunlight available.

When using an outdoor system outdoors in natural sunlight, it is also important to ensure that proper drainage is provided for all systems used outdoors in order to avoid waterlogged soils resulting from heavy rainfall or flooding events. If your area gets especially hot during the summer months, then you might want to choose a greenhouse style system that provides added humidity instead of growing your plants in soil-packed containers indoors during the summer months.

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