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How To Build A Grow Room In A Shed? – Grower’s Guide

Many farmers are interested in cultivating their plants indoors. However, planting indoors requires thorough plans and preparations, arranging the grow room and all the necessary equipment.

Indoor growing has proved to be an effective and organized method for minimizing the cost of farming.

How to build a grow room in a shed

Compact design and strategic planning, with suitable equipment, will create an efficient and cost-effective grow room.

Did you know that you can build an efficient grow room in your shed? Creating the perfect grow room would require you to consider salient points.

Factors to consider when building grow room in a shed

Grow Room Design

The design and structure of your grow room are crucial to the performance of your plants. A detailed drawing and sketch will ensure that you construct the shed in an organized approach.

Utilizing every space available to erect your grow room should be the priority of your plan.

Before purchasing all the equipment needed in the grow room, the design needs to be implemented to accommodate all the equipment. Electricity consumption in the shed should also be considered.

This would help prevent any sort of fire outbreak. Also, incorporate the plumbing system in your blueprint for ease of water distribution on the farm.

Endeavor to avoid including excessive materials that can infest the farm with pests and anything that may be harmful to the crops.

When building your grow room, it is recommended that you list all the items that will be needed.

Light Leaks

Planting crops indoors with the provision of artificial lighting is the principal purpose of growing plants indoors to produce their food.

Therefore, the room setup must be designed in such a way that the rays of the sun are not allowed inside.

This is achieved using light leaks and opaque tapes to seal every grow room area to prevent light penetration from outside.

You can confirm if you have sealed off every leak by turning off the grow lights, this will aid you to see any place that is not sealed correctly.

Reflective Surfaces

Every grow room needs reflective surfaces to increase the effect of the light on the plants.

Reflective surfaces help to enhance the productivity of the plants when the position and arrangement are made appropriately.

Some reflective surfaces that you can use include:


This is the most effective reflective surface accessible in the market. They have the efficiency of reflecting over 95% of light rays that fall on them.

Mylar is produced in varying forms; however, the form made from aluminum has a more reflective effect.

Mylar is usually placed flat on the walls of the grow room and then held firmly by tapes. This way, they reflect more light rays.

Ensure that you do not touch them often; they easily tear when there is much contact.

White Paint

Using this reflective surface in your grow room can be a better substitute if you intend to save money.

Though the market price is low, it reflects about 85% of light. White paint has the advantage that no hotspot is formed because it does not have light-absorbing qualities.

Emergency Blankets

Emergency blankets are another type of reflective surface to incorporate into your grow room. They are the most affordable reflective surfaces you can purchase.

The reflection of the light efficiency of emergency blankets is 70%.

However, this reflective surface forms a hotspot due to its light-absorbing properties, and this can cause deformation in the plants.

Ensure that the walls are flat before placing the emergency blankets to limit excessive light leakage.

Grow Lights

When constructing an indoor shed for your plants, you need to provide light, which is vital for the plant to survive.

This is an integral aspect of the building of grow rooms. The grow lights are different from the usual household lights; the lights used to grow plants are expected to offer a full spectrum.

Some grow lights to choose from when building a grow room include:

  • Compact Fluorescent Lights (CFL): These lights are mainly used when you are cultivating seeds. They do not provide enough light necessary to support the full growth of plants.
  • High-Pressure Sodium (HPS) Lights: The HPS lights offer enough light intensity in the orange spectrum, and they are more effective during the flowering stage of plants.
  • Metal Halide (MH) Lights: This light is recommended for use during the vegetation phase. It produces sufficient light in the blue spectrum.
  • Light-emitting Diode (LED) Lights: This is the best grow light available in the market. It is suitable for every phase of growth, flowering, and vegetation, in plants because they produce an adequate quantity of light. LED lights are also energy efficient. This grow light does not produce heat inside the grow room because it does not become hot when in use.

The installation and positioning of the grow lights when building the shed is vital to the plant’s growth. You can use a hood to concentrate the lights’ rays on the plants directly.

When using metal halide and High-pressure sodium lights, it is advised that you use hoods with coolers because they tend to heat up fast.

Electrical Timer

This equipment helps to turn on and off lights at the set time automatically. Probably, you may have your mind engrossed in other things and forget to turn off your lights.

The electrical timer can help you do that. This helps to regulate the hours of light required by the plants in each phase of their growth.

Ventilation System

At some point, you will need to circulate the air is the grow room to remove the excess heat. It is crucial to integrate a suitable ventilation system that regulates the CO2 in building your growing shed.

This helps to maintain the humidity and clean air within the shed. It also reduces the risk of your plants having disease occurrences. Some components of a standard ventilation system include:

  • Oscillating Fan: This aids in the distribution of air in the room to prevent the generation of hotspots within the shed that may affect the growth of the plants.
  • Carbon Filter: Some plants discharge smells that can be unfriendly. Using a carbon filter will help limit or possibly prevent such a smell.
  • Exhaust Fan: To enhance plant growth and clean air in the shed, it is necessary to introduce fresh air into the grow room. Installing an exhaust fan will help release the air within the shed every 3 – 4 minutes, maintaining fresh CO2 in the shed for plant growth.
  • Air intake: An air intake valve or suction pipe is required for an adequately ventilated grow room. This is to replace the old air discharged by the exhaust fan.

Thermometer, humidity meter, and pH meter

These meters help to measure the temperature, humidity, and PH level within the shed. You must have these measuring devices when considering building a grow room so that you can regulate the parameters.

Water Supply

 There should be channels for accessible water flow to reach all the plants in the grow room.

The water supplied to the plants should also be carefully monitored; the water should not contain excess minerals as this can damage the plants.

You can add certain chemicals to boost the acidity or alkalinity of the water as it may be required. If the water is too acidic, you can use lime.

When high in alkaline, you can add phosphoric acid to the water to regulate the PH level.

Why should you build your grow room in a shed?

Are there any benefits of arranging your grow room in a shed? Yes, of course, there are reasons why building a grow room in a shed is beneficial to you. Some of them are:

  • Available storage: An additional storage room is the most glaring advantage of growing your plants in a shed. Some sheds can have extra spaces to store both your garden materials and equipment and other objects. If you can even store your barbecue items in the shed. This extra space to keep things creates more room for your garage and living space.
  • Increased property value: The worth of your home increases in value with an extra storage room. So, if at any time you would want to sell your house, ensure you maintain the shed properly, this will prove to be a good investment.
  • Space for activities: A shed can also provide extra space for other activities. For instance, you can do your barbecue there.
  • A summerhouse: Another benefit of having a shed is that it could serve as an extra room for guests during the summer period.

Building a grow room in a shed – conclusion

If you need to build a shed grow room for your plants, you can be certain to construct a productive one when you follow the steps outlined above.

Integrating the listed equipment will optimally enhance the growth of plants.

However, it is advised that you use the LED lights and the aluminum form of Mylar in your shed; they are more appropriate.

Also, you need to ensure that you maintain good hygiene and a cleanliness routine in the grow room. Avoid littering the shed with materials that can inhibit the growth of the plants.

Disinfect the walls of the room. This also helps to control pests, insects, and diseases.

Similarly, try not to use carpets in the grow room. This breeds mold and dust that can harm you and the plants.

You can use a hard floor that will be easy to maintain, even with water spills. When building your grow room, ensure proximity from the site to a good water supply and constant electricity supply.