What if you see ants on your peony: friend or foe?

TL;DR: Ants on peonies

Ants on peonies are almost always innocent. They come for the sweet nectar droplets the plant secretes. They eat no leaves and do no damage to flowers. Stronger: ants eat other pests (aphids, small bugs). Leave them alone. They vanish on their own once the bloom opens.

Why do ants sit on peonies?

Peonies produce nectar droplets around the flower buds. This is natural. The droplets attract insects: ants especially. Ants are cheap garden workers walking 24/7 hunting for sugar.

They never eat the leaves or the petals. They just wander around hunting those sweet saps. Sometimes they feel rough, so you think they damage. But they do not.

Stronger even: ants are careful hunters. They eat aphids, small bugs, tiny beetles that eat your plants. This is why gardeners tolerate ants: they prevent worse pests.

Are ants harmful to peonies?

Almost never. Ants are not plant eaters. They are pure insect eaters, which you want. What you do see:

• Many ants on flower buds (they hunt nectar)
• Sometimes a single leaf with some insects - but they eat the insects, not the leaf
• No holes in leaves from ants
• No wilting from ants

These are all good things.

But: if you have thousands of aphids on your plant, ants work together with those aphids. They "milk" the aphids (eat their sweet secretions) and protect them from predators. This is harmful to your plant. But this rarely happens on peonies.

Why is your peony slower to bloom when ants are on it?

This is really an old myth. Peonies do not bloom slower because of ants. They bloom slowly because:

• The bud is not ripe yet (some peonies bloom late in May/June)
• Too little warmth in spring
• Peony is young (early years many peonies do not bloom)
• Heavy bloom last year - this year plant rests

Ants have NOTHING to do with this. They even help.

What does a healthy peony bud look like?

Healthy:

• Large, tight, green bud
• Some nectar (sparkles) on it
• Ants walk on it
• Bud feels firm
• In a few weeks the bud bursts open

Unhealthy:

• Bud turns brown or grey
• Bud feels soft (rot)
• Bud falls off without opening
• This is usually botrytis (fungus), not ants

What should you do? Step-by-step

Step 1: Accept the ants

First step: nothing. Leave the ants alone. They do not harm your plant.

Step 2: Wait until the bloom opens

As soon as the peony begins to flower, the ants disappear. They have no interest in open blooms (no nectar anymore). This is completely normal.

Step 3: Check for real pests

Look carefully at your plant. Do you see serious aphid plagues (lots of grey things clustering on leaves)? You must handle that. Do you see brown/grey buds? That is botrytis, not ants. Both are separate problems.

Step 4: Ensure good circulation

Peonies enjoy air circulation. Prune out old stems in spring. This helps against fungi (botrytis) and gives ants less space to work. But ants themselves are not the problem.

Step 5: Accept what wild plants do

Peonies are semi-wild plants. They need insects to reproduce. Ants, bees, butterflies - that is how nature works. Your garden needs that.

Frequently asked questions

I read somewhere that ants block the bloom?

This is more true than you think. Some gardeners gently wash ants off young buds before they open. But this is optional and not necessary. The bloom opens fine with ants on it.

Does ant poison help?

No. And you do not want it. Ant poison also kills other insects that protect your plant. Ants are not the problem.

How long until the bloom opens?

This varies per cultivar and weather. Usually 1-2 weeks from "bud visible" to "bloom open." Ants only come in this period.

My peony bloomed better last year than this year. Is that because of ants?

No. Peonies alternate bloom. Heavy year last year = rest year this year. This is natural. Ants have nothing to do with this.

Frequently asked questions

Are there peonies without ants?

No, all peonies produce nectar around flower buds. All peonies thus have ants. This is normal.

Can I wash ants off with water?

Yes, you can gently spray the bloom. But this can damage the bud. Better: just accept that ants are there for a while.

Which peony varieties have the least ant trouble?

Actually none. All peonies have equal nectar. The nectar is part of their normal growth process. You cannot prevent this.

Discover your own garden design

At [gardenworld.app](https://gardenworld.app) you can upload your front yard and see where your peonies fit best - with room for natural garden insects. A healthy garden has ants.