Checking Houseplants for Pests After Bringing Them Indoors

Oct 20, 2026

You spent all summer watching your houseplants thrive outdoors. They soaked up the sunshine, enjoyed the fresh air, and maybe even doubled in size.

Now that fall has arrived, it’s time to bring your plant babies back inside. But before you find them a cozy spot near the window, do one important thing. Check for uninvited guests.

We’re talking about houseplant pests. Those tiny hitchhikers that can sneak indoors on your favorite plants and spread to the rest of your collection.

At The Botanical Bar, we know how frustrating pests can be. The good news? A little inspection and preventative care can go a long way.

Here’s how to protect your indoor jungle this fall.

Why Houseplants Can Bring Pests Indoors

When houseplants spend time outside, they’re exposed to a completely different environment.

Fresh air and natural light can encourage healthy growth, but outdoor conditions also expose plants to insects that may not be present inside your home.

Some pests hide beneath leaves. Others gather around stems or live in the soil.

Once you bring your plants back indoors, certain pests can reproduce and spread to nearby houseplants.

That’s why we recommend inspecting every plant before bringing it inside, even if it looks perfectly healthy.

If you’re still preparing for the seasonal transition, start with our guide: How to Transition Your Outdoor Plants Indoors This Fall.

Step 1: Inspect the Undersides of Leaves

Start by checking the underside of your plant’s leaves.

Many common houseplant pests prefer sheltered areas where they’re less likely to be disturbed.

Gently lift each leaf and examine the surface.

Look for:

Tiny moving dots
Fine webbing
White cotton-like clusters
Small brown bumps
Sticky residue
Yellow or silvery spots

Use your phone’s flashlight or a magnifying glass to make small pests easier to see.

Pay extra attention to plants with dense foliage, including pothos, philodendrons, and monsteras.

Step 2: Check Stems, Leaf Joints, and New Growth

Pests don’t always stay on the leaves.

Some prefer the areas where leaves connect to stems, while others gather around tender new growth.

Take a close look at these areas:

Leaf joints: Check for cottony white clusters that may indicate mealybugs.
Stems: Look for raised brown bumps that could indicate scale insects.
New leaves: Inspect for distortion, unusual spotting, or tiny insects.
Growing tips: Watch for aphids and other pests that feed on soft new growth.

If you see something suspicious, don’t panic. Identifying the problem is the first step toward addressing it.

Step 3: Inspect the Soil and Pot

Don’t forget what’s happening below the foliage. Examine the soil surface and the area around the pot’s drainage holes. Small flying insects hovering around damp soil may be fungus gnats.

Although adult fungus gnats are mostly a nuisance, their larvae develop in moist potting mix and can damage tender roots when populations become large.

Also look for unusual soil movement, mold, or signs that the potting mix has stayed excessively wet.

A few insects around your plants don’t automatically mean you have a serious infestation, but they’re worth investigating.

Five Common Houseplant Pests to Watch For

1. Spider Mites

Spider mites are tiny and can be hard to spot without magnification.

Signs include fine webbing, tiny pale dots on leaves, and speckled foliage.

2. Mealybugs

Mealybugs often look like little pieces of white cotton.

You’ll usually find them tucked into leaf joints, along stems, or beneath foliage.

3. Scale Insects

Scale insects can appear as small brown or tan bumps attached to leaves and stems.

Because they don’t resemble typical insects, they’re easy to overlook.

4. Aphids

Aphids are small, soft-bodied insects that commonly gather on new growth.

They may cause curling leaves, distorted growth, and sticky residue.

5. Fungus Gnats

These tiny, dark flying insects are commonly associated with consistently moist potting soil.

If you notice little flies hovering around your plants when you water, fungus gnats may be the cause.

For more on identification and treatment, read our 5 Common Houseplant Pests and How to Prevent Them.

When Should You Separate a Houseplant From Your Collection?

One of the best ways to reduce the risk of pests spreading is to keep returning outdoor plants separate from your established indoor collection.

Ideally, place them in a different room for about two weeks while you monitor for pests.

During this time:

Inspect leaves and stems every few days.
Keep plants from touching one another.
Watch for new damage or insect activity.
Clean fallen leaves and debris.
Treat identified pests when necessary.

If you discover an active infestation, keep the affected plant isolated until treatment is complete and follow-up inspections show no remaining activity.

A plant that looks healthy on day one may reveal a problem several days later.

What Should You Do If You Find Pests?

First, identify the pest before choosing a treatment. Different pests respond to different control methods, and not every spray works for every insect. For some infestations, gently rinsing the foliage can remove some pests. You may also need to prune heavily affected leaves, manually remove insects, or use a product specifically labeled for the identified pest.

Always follow product instructions and test sprays on a small area of foliage first. Avoid treating plants in direct sunlight, and be especially careful with sensitive or fuzzy leaves.

Keep Your Leaves Clean

Regular leaf cleaning makes it easier to spot early warning signs and remove dust and debris.

Our Organic Houseplant Care Spray is one of our favorite Botanical Bar plant-care essentials for keeping foliage clean and glossy.

Made with ingredients including neem oil, peppermint oil, and castile soap, it’s a convenient addition to your regular leaf-care routine.

For active infestations, confirm that any pest-control product you use is appropriately labeled for the pest and application. Leaf cleaning alone may not eliminate an infestation.

Don’t Forget to Adjust Your Watering Routine

After you bring plants indoors, they may get less light and grow more slowly. That means they may not need water as frequently as they did outside. Excessively moist soil can also create favorable conditions for fungus gnats. Check the soil before watering and make sure your containers drain properly.

If your plant needs fresh potting mix, explore our Organic Potting Mix for Houseplants, made in-house at The Botanical Bar.

For more seasonal advice, read our Essential Fall Houseplant Care Tips.

Your Fall Houseplant Pest Inspection Checklist

Before introducing your plants back into your indoor collection, make sure you’ve completed these steps:

Inspect the tops and undersides of leaves.
Check stems, leaf joints, and new growth.
Examine the soil surface and drainage holes.
Remove dead leaves and debris.
Clean foliage where appropriate.
Separate returning plants for observation.
Reinspect regularly before placing plants near your other houseplants.

A few extra minutes of attention can help prevent a much bigger headache later.

Frequently Asked Questions

Should I spray my plants before bringing them indoors?

Not every plant needs a pesticide treatment. Inspect first, identify any pests, and choose a treatment appropriate for the plant and pest. Routine cleaning may be sufficient when no infestation is present.

How long should I quarantine houseplants?

Approximately two weeks is a practical initial observation period. Continue isolating plants longer if you discover pests or ongoing damage.

Can houseplant pests spread to other plants?

Yes. Several common pests, including spider mites, mealybugs, aphids, and thrips, can move between susceptible plants.

Why are tiny flies appearing around my houseplants?

Small flies around damp potting soil may be fungus gnats. Inspect the soil moisture and confirm the insect’s identity before selecting a control method.

Keep the Uninvited Guests Out of Your Indoor Jungle

Bringing your plants indoors for fall should be exciting, not stressful. With a little inspection, patience, and consistent care, you can help protect the plants you’ve spent all summer growing.

Remember, healthy plant care isn’t about being perfect. It’s about paying attention and learning what your plants need.

At The Botanical Bar, we’re here to make plant parenthood a little easier. Ready to give your houseplants some extra attention this season?

Shop our Organic Houseplant Care Spray, refresh your soil with our Organic Potting Mix, or explore our full Plant Care Collection.