How to Prepare for Indoor Growing Emergencies

How to be prepared and prevent emergencies when growing indoor!
05 March 2021
15 min read
How to Prepare for Indoor Growing Emergencies

Contents:

Unlike growing outdoors, when growing cannabis indoors you are the one in charge of making sure every piece of equipment works properly, meaning that you are responsible for checking, controlling, and adjusting the lights, fan, exhaustion, and everything else. This happens because your equipment is responsible for maintaining a good growing environment, playing a vital role in the quality and yields so you need to be prepared for a power outage.

1. Precautions: Avoiding Electrical Emergencies

If you’re new to growing cannabis or you have grown outdoors before and are just starting to set up your grow tent don’t have basic electrical knowledge, you need to have in mind there are a couple of things you have to be aware of before you plug everything in.

 

Indoor growing emergencies: precautions

Make sure you know how much the circuit can handle before plugging everything in.
 

Apart from making sure everything inside your grow tent is proper, you should also make sure that the plugs you’ll be using can take the amount of power you need, so once you know how many plugs you’ll be using you will need to know how much power your equipment will need.

All electrical outlets in your house, office, or anywhere else are on a circuit, this means that the outlets in your grow room are on a circuit, so before calculating you will need to know which outlets belong to which circuit.

How To Identify Your Circuit Amperage

This can be quite easy to know because the circuit breaker panel should have labels on it but, if it doesn’t, you will have to figure it out yourself or hire an electrician.

 

Indoor growing emergencies: amperage

Once you've identified the circuit is quite easy to know the amperage, just look at the labels!
 

Once you’ve identified which circuits the outlets you’ll be using belong to, you need to see the amperage; The amperage should be on the label mentioned before, listed as either 10A, 15A, 20A, and so on.

How to Calculate Circuit Capacity

So now that you know which circuit you’ll use and the amperage, it’s just a matter of doing simple math, so if you’re using 220V outlets and your circuit is labeled as 15A it means that the circuit can handle 3300W.

To help you understand it better here’s the simple formula:

 

Outlet Voltage x Amperage = Max Wattage

220V x 15A = 3300W

 

If you don’t want to deal with math, here’s a quick table to make your life easier:

 

Voltage110220
Amperage101520101520
Max Wattage110016502200220033004400

 

Remember that this is NOT the maximum wattage that a single outlet can handle, this value is what the whole circuit can handle so if you need more power you can use an extension cord to connect some of the equipment to other plugs in another room, they should be on a different circuit. 

How to Calculate Your Power Consumption

Now that you know approximately how much your circuit can handle, it’s essential you calculate how much your growing equipment will need, this can be easily calculated by checking the label on your LED light for example.

What you’ll need to know is the voltage (120V or 220V) and the wattage (power consumption), in this example we’ll be using an LED light with a consumption of 100W at 120V, so once you have this information you just do the following:

 

Wattage ÷ Voltage = Amperage 

100W ÷ 120V = 0.83A

 

This means that this specific LED light only consumes approximately 0.83A, meaning that your circuit can still handle 14.17A (following our example of a 15A circuit) so you won’t have to worry if you’re only having one light in your grow tent but remember that for the best conditions possible you’ll also need a couple of fans and an exhaust fan so you will also have to take that into account and add them up.

 

Indoor growing emergencies: power consumption

How to calculate power consumption.
 

This is super important because if the total wattage in your circuit adds up to more than what your circuit can handle, your circuit may shut off to prevent even worse problems.

Also, have in mind that when you’re keeping your equipment on for more than 3 hours (aka continuous load) the wattage your circuit can take is 20% lower so make sure you always keep this in mind to avoid problems.

Overloading a circuit can cause a power outage, and as said before, your equipment is basically responsible for keeping your plants alive, so what to do when there’s a power outage?

2. What To Do When There’s A Power Outage?

When there’s a power outage either caused by overloading the circuit or caused by something else, the conditions in your grow room will start to change, your plant will not be getting light and if you’re growing in a hydroponic setup, your plant’s won’t be getting enough oxygen after a couple of hours.

Obviously, the best solution would be to have an alternative source of power but if you don’t have a backup generator or solar panels, what can you do to minimize plant stress?

What To Do When Lights Go Off

The most important thing when there’s a power outage is to make sure your plant gets some light during the light period (when the lights should be on), because a plant left in complete darkness can end up deteriorating and dying but giving it a minimal amount of light can slow that down.

 

Indoor growing emergencies: lights go off

When there's a power outage you should try to maintain your plant's light cycle with any type of light.
 

The plan is to help them maintain their light cycles so you can even do it with weak light such as a flashlight because, at this point, your objective is to prevent them from getting too stressed or dying.

So, if possible, hang a flashlight or any other source of light inside your grow tent to minimize stress.

Have in mind that if there’s a power outage your timer won’t work so you will have to remember to turn the flashlight on and off according to the light cycle your plants are.

Simple Tips To Fight Lack of Light During A Power Outage 

You don’t need to spend a lot when facing an emergency like this one, so here are a couple of things that can end up saving your crop when there’s a power outage.

  • Strong flashlight and a couple of battery packs;
  • Battery-powered lights of any kind (lantern, Christmas lights, etc.);
  • Solar-powered generator.

Humidity starts dropping

If you live in a dry place and the power goes out your humidifier will stop working and the humidity will start dropping and this can be very bad; Cannabis plants need a relative humidity of around 60-70% during the vegetative stage and 40-50% during flowering, so depending on the stage your plants are in, you’ll need to try to fix this.

 

Indoor growing emergencies: humidity

It's essential you try to maintain the humidity levels in your grow tent to avoid stress.
 

Just like with the temperature, there isn’t much you can do, you can fill a couple of buckets with water and place them inside your tent, spray your plants and inside of your tent with water, or even do both but this is just a temporary solution. 

Doing this can help your plants survive for a couple of hours but depending on how long it takes for the power to come back and how dry it is, it may not be enough; Unfortunately, there’s no easy solution other than doing this continuously or having a portable generator.

Simple Tips To Fight Low Humidities During A Power Outage

There aren’t any simple solutions when talking about humidity levels, you can solve this by having a battery-powered humidifier but if you don’t have one there’s not much you can do, unfortunately.

3. What If I’m Growing In Hydro or Aeroponics?

If you’re a hydro grower you’ll experience the problems cited above but the main issue will be a lack of oxygen, this happens because roots need oxygen to live.

Keeping the Nutrient Solution Oxygenated

Normally, you would have a couple of air stones oxygenating the water but when there’s a power outage, the air stones won’t work anymore and the roots will use the oxygen until there’s no more oxygen in the water.

Now, depending on how many plants you have in the reservoir, the oxygen can last for a couple of hours but if the power outage lasts more than 1-2hs and your plants start drooping, you will have to take drastic measures.

 

Indoor growing emergencies: oxygenation

Oxygen is vital for your plants to survive.
 

So, in the first place, drain all the water from the reservoir and then slowly pour it back in, this should provide a good amount of oxygen for another hour.

In second place, if the power doesn’t come back, you will have to drain the water again and change the water; Make sure you check the pH, PPM, and everything you usually do because despite being an emergency change of water, this is the same nutrient solution change you would normally do.

You can repeat these two steps until the power comes back, this is obviously quite exhaustive but it’s the only way to save your plants, also, depending on how cold it is, you may have to heat the water a bit.

Keeping The Nutrient Solution At The Right Temperature

As you may know, when growing hydroponically you need to adjust the temperature of the nutrient solution, which is usually around 20°C and when there’s a power outage, you may find it hard to do so.

If, for example, you’re in the winter season and your tap water is too cold, you will have to heat up a small amount of water to mix it in your nutrient solution because if the nutrient solution is below 13°C it can have a toll on your plants.

 

Indoor growing emergencies: temperature

When growing in hydro it's essential to adjust the temperature of the nutrient solution to avoid stunting root growth.
 

To try and fix this, heat up a couple of liters of water (in your fireplace or gas stove if possible) and slowly pour it into the reservoir with the cold water, using the thermometer to check the temperature, once it has reached around 20°C you’re all good to go.

By providing a nutrient solution with the right temperature, your plants may be able to survive for longer even if it’s cold, just remember that you should never feed your plants with hot water!

Simple Tips To Fight A Power Outage In Hydro

It’s quite hard to deal with a power outage for cheap when growing in hydro or aeroponics due to this kind of setup needing a lot of equipment, but here are a couple of things that could help you save your plants.

Battery-powered air pump

A battery-powered air pump comes with an airstone and will allow you to oxygenate your nutrient solution for up to 24hs with a pair of batteries, this way you won’t have to drain and change the water.

 

Indoor growing emergencies: power outage in hydro

Equipment that can help you save your plants in a hydro setup during a power outage.
 

Inverter 

An inverter allows you to connect it to your car’s battery, this way you can run up to 300w which should be enough for the basic things to keep your plants alive, the downside is that you will need a long extension cord to be able to connect your equipment to the inverter.

Gas-powered generator

A gas-powered generator would be the ideal choice but can be very expensive, this equipment also makes a lot of noise so it may not be what suits you better but it will definitely allow you to keep everything going as it should until the power comes back.

4. In Conclusion

Now that you know how to save your plants from a catastrophe, make sure you are extra cautious when plugging a lot of equipment in the same room, it may be a bit hard to calculate everything but it’s definitely worth it.

If you have basic electrical knowledge, feel free to help fellow growers, leave your tips in the comment section below!

 

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05 March 2021
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