Common Calathea Pests (And What To Do About Them)

Calatheas are stunning houseplants known for their striking leaf patterns and vibrant colors. However, as much as we love these beauties, they can sometimes attract unwelcome guests. Yes, we're talking about pests! These pesky critters can cause quite a headache for plant lovers, but fear not—most pest problems are manageable with a little patience and know-how.

Today, we're diving into some of the most common pests that target Calatheas and how to handle them. From spider mites to fungus gnats, we'll cover everything you need to know to keep your Calathea healthy and thriving. So grab a cup of tea, settle in, and let's get started on pest-proofing your leafy companions.

Spider Mites

Spider mites are tiny, sap-sucking pests that can be a nightmare for Calathea owners. These minuscule arachnids are hard to spot with the naked eye, but their presence becomes evident when you notice fine webbing on your plant or leaves that look speckled and discolored.

Spider mites thrive in hot, dry conditions. If you've got your Calathea near a heating vent or in a sun-drenched spot, you might be inadvertently creating a spider mite paradise. So, what's the game plan to evict these pests?

• Increase humidity: Calatheas love humidity, and spider mites do not. Consider using a humidifier or placing a tray of water near your plant to raise the moisture level in the air.
• Wash the leaves: A gentle shower for your plant can help dislodge spider mites. Use lukewarm water and be sure to spray both sides of the leaves.
• Neem oil: This natural pesticide is effective against spider mites. Spray a diluted neem oil solution on your Calathea, making sure to cover all leaf surfaces.

Keep an eye on your plant and repeat treatments as necessary. With persistence, you can restore your Calathea to its former glory.

Aphids

Aphids are small, soft-bodied insects that suck the sap from your plants, causing leaves to curl and yellow. They can also leave behind a sticky substance called honeydew, which can attract mold and other pests.

These little guys have a way of multiplying quickly, so early detection and action are vital. Here's how to tackle an aphid invasion:

• Manual removal: Sometimes, you can simply wipe aphids off with a damp cloth or rinse your plant with water to wash them away.
• Insecticidal soap: This is a safe and effective way to deal with aphids. Spray your Calathea thoroughly, focusing on the undersides of leaves where aphids like to hide.
• Introduce beneficial insects: If you have access to ladybugs or lacewings, they can help control aphid populations naturally.

Regularly inspect your Calathea to catch any new aphid colonies early, and you'll keep these pests in check.

Fungus Gnats

Fungus gnats are more of an annoyance than a serious threat to your Calathea, but they can still be a nuisance. These tiny black flies are often seen buzzing around the soil surface, where their larvae feed on organic matter and roots.

Fungus gnats thrive in moist environments, which means overwatering could be the culprit. Here's how to manage them:

• Let the soil dry out: Fungus gnats need moisture to breed, so allowing the top layer of soil to dry between waterings can disrupt their life cycle.
• Sticky traps: Place yellow sticky traps near your Calathea to catch adult gnats.
• Natural predators: Consider using beneficial nematodes, which are small worms that can help control fungus gnat larvae in the soil.

By reducing moisture and using natural controls, you can effectively manage fungus gnat populations.

Thrips

Thrips are slender, winged insects that can cause significant damage to your Calathea by feeding on its leaves. They leave behind silvery streaks and can cause leaves to curl and become discolored.

These pests can be a bit trickier to control, but it's not impossible. Here's what you can do:

• Isolation: Keep affected plants away from others to prevent thrips from spreading.
• Prune damaged leaves: Remove leaves that are heavily infested to limit the thrips' food source.
• Insecticidal soap or neem oil: Regular applications can help reduce thrip populations. Be sure to treat both the tops and undersides of the leaves.

With consistent care and monitoring, your Calathea can bounce back from a thrip infestation.

Mealybugs

Mealybugs are small, white, cottony insects that can cluster on the stems and leaves of your Calathea. They suck sap from the plant, leading to weakened growth and yellowing leaves.

These pests are often brought in on new plants, so always check new additions to your collection. Here's how to handle mealybugs:

• Manual removal: Use a cotton swab dipped in alcohol to gently remove mealybugs from your plant.
• Neem oil: As with other pests, neem oil can be effective in controlling mealybugs. Spray thoroughly over the plant, paying close attention to the affected areas.
• Encourage beneficial insects: Predators like ladybugs and lacewings can help manage mealybug populations naturally.

Regular monitoring and quick action are essential in keeping mealybugs at bay.

Scale Insects

Scale insects are small, oval pests that latch onto the stems and leaves of your Calathea, forming hard, shell-like coverings. They feed on sap, weakening your plant and leaving behind honeydew, which can attract mold.

Scale can be a bit stubborn, but with the right approach, you can manage them effectively:

• Manual removal: Gently scrape off scale insects with your fingernail or a soft brush.
• Horticultural oil: This suffocates scale insects and is less harmful to beneficial insects. Apply thoroughly to affected areas.
• Regular inspection: Keep an eye on your plants for any new scale insects and remove them promptly.

With persistence, you can rid your Calathea of these pesky scales.

Whiteflies

Whiteflies are small, moth-like insects that tend to swarm around plants when disturbed. They feed on the underside of leaves, causing them to yellow and drop prematurely.

These pests can be quite annoying, but here's how you can manage them:

• Sticky traps: Place yellow sticky traps near your Calathea to catch adult whiteflies.
• Insecticidal soap: Spray affected plants, focusing on the undersides of leaves, where whiteflies congregate.
• Encourage natural predators: Ladybugs and lacewings can help control whitefly populations.

Consistent treatment and monitoring will help keep whiteflies under control.

Broad Mites

Broad mites are extremely tiny pests that can cause severe damage to your Calathea. They feed on the sap, leading to distorted and stunted growth, and are often hard to detect without a magnifying glass.

If you suspect broad mites, here's what to do:

• Isolation: Immediately separate affected plants to prevent the spread.
• Neem oil or miticides: These can be effective against broad mites. Be sure to cover all parts of the plant thoroughly.
• Boost humidity: Mites dislike high humidity, so consider increasing the moisture around your plant.

Regular checks and prompt treatment can help protect your Calathea from these hard-to-spot pests.

Leaf Miners

Leaf miners are larvae that burrow into leaves, leaving behind distinct trails. While they don't typically cause severe damage, their presence can be unsightly and indicate other pest issues.

Here's how you can address leaf miners:

• Remove affected leaves: Prune away leaves with visible trails to reduce the number of larvae.
• Neem oil: This can deter adult flies from laying eggs on your plant.
• Encourage natural predators: Parasitic wasps can help control leaf miner populations.

By managing leaf miners, you can keep your Calathea looking its best.

Final Thoughts

Dealing with pests on your Calathea can be a bit of a challenge, but with the right strategies, you can keep your plants healthy and vibrant. Regular inspections and early interventions are crucial in managing any pest problem.

At Cafe Planta, we’re all about helping you succeed with your plant care journey. Whether you're in the market for new houseplants or need advice on tackling pest issues, we’re here to help. Feel free to reach out to us by email or send us a message on Instagram. Let's grow together and keep those Calatheas thriving!