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Ants are on your marigolds mainly because they are attracted to the tiny, sweet secretions produced by the plant or by pests living on it.
This natural connection between ants and marigolds can sometimes be surprising, but it’s a common garden occurrence.
If you’ve found yourself wondering, “Why are ants on my marigolds?” you’re not alone.
In this post, we’ll explore why ants are on your marigolds, the relationship between ants and the plant, and how you can manage ants if they become a problem.
Why Are Ants On My Marigolds?
Ants are on your marigolds primarily because of a fascinating natural relationship involving nectar and plant pests.
1. Marigolds Produce Extrafloral Nectar
Marigolds produce not just the regular nectar inside their flowers but also extrafloral nectar from glands located on their leaves and stems.
This nectar is a sugary secretion that ants find irresistible.
Even though it’s not meant to attract pollinators, this nectar serves as a food source for ants and other insects.
So, when ants appear on your marigolds, it’s often because they’re feasting on this sweet extrafloral nectar.
2. Ants Protect Honeydew-Producing Pests
Another reason ants are on your marigolds is that they farm and protect honeydew-producing pests like aphids, whiteflies, or scale insects.
These tiny insects secrete a sticky, sweet substance called honeydew which ants love.
In exchange for honeydew, ants protect these pests from predators and parasites.
So, if your marigolds are hosting aphids or similar insects, ants will be there to harvest the honeydew.
3. Ants Use Marigolds as Pathways
Sometimes ants are on your marigolds simply because the plants provide great pathways to other parts of your garden.
Ants establish trails along stems and leaves as safe highways between their nests and food sources.
Marigolds with dense foliage make perfect ‘roadways’ for ants to move around.
So even if the ants aren’t feeding directly on the marigolds, you may still see them on the plants frequently.
Are Ants On Marigolds Harmful To Your Plants?
You might be worried that ants on marigolds mean the plants are in trouble.
Here’s what you need to know about ants’ impact on your marigolds.
1. Ants Themselves Don’t Usually Damage Marigolds
Generally, ants do not directly harm marigold plants.
They don’t eat leaves, flowers, or roots.
So, ants on your marigolds are harmless in and of themselves.
However, their presence can signal other issues.
2. Ants Can Encourage Pest Infestations
The downside of having ants on your marigolds is their association with sap-sucking pests like aphids that do harm your plants.
By protecting these pests, ants indirectly promote infestations that cause leaf curling, yellowing, and stunt growth.
So, if ants are farming honeydew-producing insects on your marigolds, those pests might be damaging your plant health.
3. Ants Can Interfere With Natural Pest Control
Beneficial insects like ladybugs, lacewings, and parasitic wasps naturally control aphids and whiteflies.
But ants guard the pests aggressively to secure their honeydew supply.
This protection reduces the effectiveness of natural predators and slows pest control efforts.
Thus, ants on marigolds can indirectly make pest problems worse.
How To Manage Ants On Your Marigolds
If you’re wondering how to get rid of ants on your marigolds, there are several friendly and effective methods to consider.
1. Check For And Control Honeydew-Producing Pests
Since ants stick around for the honeydew pests produce, controlling these pests is critical.
Regularly inspect your marigolds for aphids, scales, or whiteflies.
Use insecticidal soap or neem oil to reduce pest populations safely.
Removing pests will discourage ants from congregating on your marigolds.
2. Use Barriers And Ant Deterrents
To protect your marigolds from ant invasions, create physical barriers.
Applying a sticky barrier like Tanglefoot around plant stems stops ants from climbing the plants.
You can also use natural deterrents such as sprinkling cinnamon, coffee grounds, or diatomaceous earth around your marigolds.
These substances disrupt ants’ trails and discourage them from settling.
3. Encourage Natural Predators
Certain insects and birds eat ants or the pests they protect.
Encouraging ladybugs, spiders, or birds in your garden can help keep ant and pest populations under control.
Planting a variety of flowering plants alongside marigolds helps attract beneficial predators that balance the ecosystem.
4. Avoid Over-Fertilizing
Over-fertilizing marigolds can increase sap and nectar production, indirectly encouraging ants and pest insects.
Stick to recommended fertilizer doses to avoid creating an overly attractive environment for ants.
5. Use Ant Baits Carefully
If ant populations near your marigolds become overwhelming, ant baits placed away from plants may help reduce their numbers.
Baits attract worker ants that carry poison back to the colony.
However, avoid spraying broad insecticides directly on marigolds, as they might harm beneficial insects.
Are Marigolds Effective At Repelling Ants?
Many gardeners grow marigolds because they are believed to repel pests.
So, does this include ants? Let’s clear this up.
1. Marigolds Have Mixed Effects On Ants
While marigolds have natural pest-repelling properties, they are not particularly known as ant repellents.
In fact, the extrafloral nectar attracts ants rather than repels them.
So planting marigolds alone won’t keep ants away from your garden.
2. Marigolds Can Deter Some Other Pests
Marigolds emit a strong scent that repels some insects like nematodes, aphids, and certain beetles.
This scent can help reduce pest pressures but doesn’t stop ants that are drawn to the nectar or honeydew producers.
So while marigolds are great for pest control, they are not an ant deterrent specifically.
3. Companion Planting Helps Overall Garden Health
Marigolds are often used in companion planting to lure beneficial insects and improve garden health.
But if you have persistent ant problems on your marigolds, you may need additional ant control measures beyond planting marigolds.
So, Why Are Ants On My Marigolds?
Ants are on your marigolds because the plants produce extrafloral nectar that ants love, and because marigolds often host honeydew-producing pests like aphids that ants farm for their sugary secretions.
Ants benefit from the nectar and honeydew, and in return, they protect these pests from their natural enemies.
While ants themselves don’t directly harm marigolds, their relationship with harmful pests can affect plant health.
To manage ants on your marigolds, focus on controlling aphids and other pests, use physical barriers like sticky bands, and encourage natural predators in your garden.
Remember, marigolds alone won’t repel ants, so combining strategies is key to keeping your garden healthy and ant-free.
Understanding why ants are on your marigolds helps you take the right steps to enjoy the vibrant beauty and pest-repelling benefits of these cheerful flowers without the unwanted ant visitors.