Can You Spray Roundup Around Blueberry Bushes

You can spray Roundup around blueberry bushes, but you have to be extremely careful because blueberry roots are shallow and sensitive.
 
Roundup, or glyphosate, is a non-selective herbicide, meaning it can kill or damage almost any plant it touches.
 
So if you’re wondering whether you can spray Roundup around blueberry bushes without harming them, the short answer is yes, but only if you do it the right way.
 
In this post, we’ll look at when spraying Roundup around blueberry bushes is safe, when it’s risky, and how to protect your bushes while still getting rid of weeds.
 
Let’s dig in.
 

Can You Spray Roundup Around Blueberry Bushes Safely?

You can spray Roundup around blueberry bushes safely if you keep the spray away from the bush itself.
 
The danger isn’t just the leaves you can see above ground.
 
Blueberry bushes have shallow, fibrous roots that spread out just under the soil surface, often reaching well beyond the drip line.
 
If Roundup soaks into the soil and reaches those roots, it can weaken or even kill your blueberry bush over time.
 
Roundup works by being absorbed through green leaves and stems, then traveling down to the roots to stop growth.
 
That’s why spraying it directly on your blueberry bush is a bad idea.
 
But spraying Roundup around the base of the bush, on weeds growing nearby, can work if you take precautions.
 
The key is making sure the herbicide never touches the blueberry plant itself or the soil right around its roots.
 

1. Timing Matters When You Spray Roundup Around Blueberry Bushes

The best time to spray Roundup around blueberry bushes is when the bushes are dormant, usually in late winter or early spring before new growth appears.
 
During dormancy, the blueberry bush isn’t actively taking up nutrients or water the way it does during the growing season.
 
This lowers the risk of accidental absorption through the roots.
 
Avoid spraying Roundup around blueberry bushes during flowering or fruiting, since the plant is most vulnerable then.
 
Also skip spraying on windy days, because drift can carry Roundup onto your blueberry leaves without you even realizing it.
 

2. Shield the Blueberry Bush Before You Spray

Before you spray Roundup around blueberry bushes, cover the base of the bush with a bucket, cardboard, or a plastic shield.
 
This physical barrier keeps the spray from landing on the blueberry plant or the soil directly around its roots.
 
You can also use a piece of plywood held between the sprayer and the bush as you work.
 
Spray low and close to the weeds so the mist doesn’t drift upward onto the blueberry foliage.
 
This simple step makes a huge difference when you spray Roundup around blueberry bushes.
 

3. Use a Targeted Sprayer, Not a Broadcast Sprayer

When you spray Roundup around blueberry bushes, use a hand pump sprayer or a wand with a narrow nozzle.
 
This lets you aim precisely at the weeds instead of blanketing the whole area.
 
Broadcast sprayers throw herbicide everywhere, which is a recipe for disaster near shallow-rooted bushes like blueberries.
 
A targeted approach means less Roundup ends up in the soil, and less chance of it reaching your blueberry roots.
 

4. Avoid Spraying Roundup Around Blueberry Bushes in Hot Weather

Heat makes herbicide more volatile, meaning it can turn into vapor and drift onto your blueberry bush.
 
Spraying Roundup around blueberry bushes in the middle of a hot summer day raises the risk of vapor drift and leaf damage.
 
Early morning or late evening on a calm, cool day is a much safer window.
 

5. Don’t Spray Roundup Around Blueberry Bushes Right After Rain

Wet soil makes it easier for Roundup to move downward toward the roots.
 
If you spray Roundup around blueberry bushes when the ground is saturated, the herbicide can leach into the root zone faster.
 
Wait until the soil has drained and the weeds are dry before you spray.
 

Risks of Spraying Roundup Around Blueberry Bushes

Even when you’re careful, spraying Roundup around blueberry bushes comes with real risks you should weigh.
 

1. Root Absorption Can Kill the Bush

Blueberry roots are shallow and spread wide, so they’re more exposed than the roots of deeper-rooted plants.
 
If Roundup reaches those roots, the bush may show yellowing leaves, stunted growth, or dieback over several weeks.
 
Sometimes the damage isn’t obvious until the next growing season.
 

2. Drift Can Damage Leaves and Fruit

A tiny amount of drift from spraying Roundup around blueberry bushes can cause leaf curling, spotting, or deformed fruit.
 
Even a light breeze can carry the mist further than you expect.
 

3. Soil Residue Can Build Up Over Time

Glyphosate binds to soil particles and usually breaks down, but repeated spraying in the same spot can leave residue.
 
Over years of spraying Roundup around blueberry bushes, that residue can affect soil health and beneficial microbes.
 

Safer Alternatives to Spraying Roundup Around Blueberry Bushes

If you’d rather not risk spraying Roundup around blueberry bushes at all, you have options.
 

1. Hand Pull Weeds Regularly

Pulling weeds by hand is the safest way to keep the area around blueberry bushes clear.
 
It takes more time, but there’s zero risk of herbicide damage.
 

2. Mulch Heavily Around the Base

A thick layer of pine bark, wood chips, or straw smothers weeds and keeps blueberry roots cool and moist.
 
Mulch also reduces the need to spray Roundup around blueberry bushes in the first place.
 

3. Use a Flame Weeder Carefully

A quick pass with a flame weeder can kill small weeds without chemicals.
 
Just keep the flame far from the blueberry canes and roots.
 

So, Can You Spray Roundup Around Blueberry Bushes?

You can spray Roundup around blueberry bushes, but only if you shield the bush, target the weeds precisely, and avoid spraying when the plant is actively growing.
 
Roundup can kill or damage blueberry bushes if it reaches their shallow roots or drifts onto their leaves.
 
If you’re not confident you can keep the spray contained, hand pulling and mulching are far safer choices.
 
With care and the right timing, spraying Roundup around blueberry bushes can be done without hurting your plants.