The Best Way to Get Rid of Spider Mites on Cannabis at Time of Harvest

A spider mite is your worst enemy if you’re growing cannabis plants indoors.

And the plants are ready to flower.

Spider mites can attack the plants any time.

However, the flowering phase is the worst.

Because your yields become useless.

And there’s nothing you can do if the infestation is severe.

But, there are ways to prevent the attack.

And also prevent it, if you catch it in time.

So, today I’ll show you the best way to get rid of spider mites.


Quick Top 5 Best Way to Get Rid of Spider Mites on Cannabis:

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What are spider mites?

As the name suggests, spider mites are closely related to spiders.

Spider mites also belong to the Arachnid family.

Spiders usually mind their own business and hunt for other pests.

But spider mites make it their life’s mission to suck everything from plants.

They have the sharpest teeth you can imagine.

And these tiny buggers pierce the leaves and wreak havoc.

How to identify spider mites?

The biggest problem a cannabis grower encounters is the inability to identify spider mites.

When spider mites suck the leaves, they leave tiny white marks.

But these marks or speckles are so small that they are almost unnoticeable.

Don’t confuse the white spots with Powdery Mildew, though.

That’s totally different.

Once you grow several cannabis plants, you’ll become an expert at identifying these pests.

But until then, you have to look for a few signs.

It’s recommended that you get a magnifying lens to investigate the plants.

A simple jeweler’s loupe will do.

If you look closely, you’ll see that the white marks are concentrated in specific areas.

The underside of the leaves will also have webbing.

However, if the leaves are already revealing webbings, it means that it’s too late!

And you have to act immediately!

The signs are very easy to ignore in the beginning.

But within a short period of time, you’ll witness a full-blown infestation.

Therefore, it’s best to investigate the leaves frequently.

Your only weapon is time.

Because the faster you catch these critters, the better your chances.

Some leaves will also have green dots on them.

These dots are the mites’ gut contents.

If you see white speckles and green dots together, you can be 100% sure that they are spider mites.

A magnifying glass will show you that the pests are oval in shape.

There will be hundreds of them on a single leaf.

Spider mites work from the bottom to the top.

So, look for the lower leaves to detect problems first.

As the population increases, the leaves will begin to yellow.

Place a white paper below the plant and shake the leaves.

If you see tiny insects falling on the paper, it’s a classic sign that the plant is in trouble.

How to prevent spider mites?

They say prevention is better than cure.

So before we talk about how to get rid of the mites, let’s understand how to prevent them.

You can’t really prevent spider mites from entering your indoor grow room.

But, you can do your best.

Here are a few steps you can take:

Don’t be a pest carrier!

First, you need to make sure that you change your clothes before entering the grow room.

It’s very easy for mites to enter your room while clinging on to you!

If you’ve touched other infested plants, take a shower before tending to healthy plants.

It might seem too much, but you have to do it to outsmart the mites.

Also, if you’re getting plants indoors, make sure that they’re clean before moving them.

It’s better to deal with one plant than treating the entire crop!

All this holds true for even clones.

If you plant clones, spray them with soapy water until you’re sure they are clean.

Maintain cleanliness

Another important thing to remember is to maintain cleanliness in the grow room.

Mites love dead material such as leaves and stems.

They will cling on to them and infest your next crop.

So, clean your room after every single harvest.

There are no exceptions.

If you have pets, try your best not to let them enter the room.

Increase the ventilation

The best way to reduce heat is to increase the ventilation in the grow room.

Install some powerful fans to increase the airflow.

This not only reduces the temperature, but it also creates such a strong breeze that it prevents the mites from multiplying further.

Nurture the plants

Spider mites generally attack weak plants.

Therefore, feed your plant well and make it robust so that the mites don’t latch on to them.

Consider growing organically so that you don’t have to worry about nutrient schedules.

Understand the life cycle

It’s imperative to understand the life cycle of the spider mite.

They thrive in very specific conditions where there is high heat and low humidity.

When humidity goes below 50%, the mites complete their full life cycle.

This takes only about a week.

And that’s why it’s so difficult to detect these pests.

You can reduce the heat and increase the humidity to deter them to an extent.

If growing outdoors, take extra precautions because the temperature rises in summer.

How to get rid of spider mites

Even if you try everything and prevent them, spider mites have a way of getting things done.

If you see white specks, the first thing you can do is water the plants.

Use plain water and wash the plants thoroughly.

Focus on the undersides of the leaves and soak them with water.

For better results, mix some liquid soap and spray the plants.

The mites will slip on the soap and fall.

Although you won’t be able to get rid of all of them, it’s a good start.

You can reduce the population if you keep spraying continuously for at least ten days.

Spray until you see no mites.

However, some infestations are so severe that mere soap water won’t cut it.

For such situations, use commercial remedies such as:

The Best Way to Get Rid of Spider Mites on Cannabis

Azamax is an insecticide meant to kill spider mites, fungus gnats, thrips, aphids and other pests.

With azadirachtin as the main ingredient, Azamaz is natural.

This insecticide kills pests by starving them.

Use one tablespoon per gallon until the population of the mites reduces.

Crop Control is a powerful solution to keep insects under control.

You only need to mix a half ounce with one gallon of water.

Spray the plants with the solution.

Repeat the process for at least a week for great results.

Crop Control contains essential oils like peppermint, thyme, garlic, and clove.

It's completely natural, and you don't have to worry about smoking chemical-laden buds.

As the name suggests, Mite Massacre destroys mites.

Spider mites are most dangerous to cannabis plants because they become immune to anything you spray.

However, Mite Massacre prevents the bugs from becoming immune.

It comes with a two-stage procedure to kill all the pests.

In the first stage, it suffocates the mites.

And in the second, it penetrates the bodies of the mites.

It also destroys the eggs so that the mites never return!

It is prepared with a soap blend that contains unique fungicidal and pesticide properties.

Mite Massacre is also natural and non-toxic.

So, spray away to your heart’s content.

But you only need a half ounce to create a gallon of spray.

Smite is made with a micronization technology that’s patented.

Smite is a concentrated solution of plant oils.

The plant oils are compressed to less than a micron in size.

Heavy oils such as Peppermint, Rosemary, Cottonseed and Geranium are effective to ward off the pests.

Not only is it non-toxic, but the extract ensures that the mites don’t come back.

Many growers use traditional methods to get rid of spider mites.

From using earthworms to other beneficial microorganisms, growers experiment a lot.

If you don’t want to use commercial pesticides, you can use other ways.

And one of the most common ways is to use ladybugs.

Ladybugs are natural predators that feed on a host of pests.

The larvae start feeding almost as soon as it’s born.

Aggressive and ferocious, the larvae feed on aphids, spider mites, scales, and thrips.

Now, you’re probably wondering where to get ladybugs.

If growing outdoors, luring ladybugs into your garden shouldn’t be a problem.

While growing indoors, however, you can purchase them on Amazon!

Yes, you get live larvae that can be set free on the plants as soon as they arrive.

NS killer is an organic insecticide meant to eradicate spider mites.

Since it’s completely safe to be used, you can mix it with the feeding water.

Just mix the insecticide along with the nutrients.

It can be sprayed even when the plants are flowering.

It’s best to stay away from chemical-based insecticides when the plant is flowering.

Once the plant goes too far into the flowering stage, it’s not possible to remove the spray.

NS killer is organic and can be used even around pets and children.

There are several ways to get rid of spider mites.

But make sure that you detect them early.

If the infestation is too severe, it can take weeks for the plant to recover.

If in doubt, use NS killer as a preventative method even if you can’t see the mites.   

Last update on 2021-03-25 / Affiliate links / Images from Amazon Product Advertising API

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