Do Blackberries Send Out Runners

Blackberries send out runners, and that’s actually one of the main ways they spread and multiply in your garden.
 
These runners, often called trailing canes or stolons, are long stems that grow horizontally along the ground and root wherever they touch the soil.
 
So if you’ve ever wondered “do blackberries send out runners,” the short answer is yes, and understanding this growth habit is key to managing them successfully.
 
In this post, we’ll take a closer look at why blackberries send out runners, how to identify them, and what you can do to keep them under control.
 
Let’s dive in.
 

Why Blackberries Send Out Runners

Blackberries send out runners as a natural survival strategy, and here’s why that matters for anyone growing them.
 

1. Runners Help Blackberries Spread and Multiply

The main reason blackberries send out runners is to expand their territory.
 
In the wild, blackberries use these runners to colonize new ground quickly, forming dense thickets that can crowd out competing plants.
 
Each runner that touches soil can develop its own root system and grow into a brand-new plant, which is why a single blackberry patch can turn into a bramble jungle in just a season or two.
 

2. They’re a Form of Vegetative Reproduction

When blackberries send out runners, they’re reproducing without seeds.
 
This is called vegetative reproduction, and it’s a much faster way for the plant to spread than waiting for birds or animals to drop seeds.
 
The new plants are genetically identical to the parent, so if you have a blackberry variety you love, runners give you free clones of it.
 

3. Some Varieties Rely on Runners More Than Others

Not all blackberries send out runners to the same degree.
 
Trailing varieties, like many of the thornless types, tend to send out long runners that sprawl across the ground.
 
Erect varieties are more upright and self-supporting, so they don’t send out runners quite as aggressively.
 
Knowing which type you’re growing helps you predict how much runner control you’ll need.
 

How to Identify Blackberry Runners

If you’re trying to figure out whether your blackberries are sending out runners, here are the signs to look for.
 

1. Long Stems Growing Along the Ground

Blackberry runners look like long, flexible stems that grow flat along the soil surface rather than reaching upward.
 
They can stretch several feet from the main plant, and you’ll often find them sneaking into lawn areas or garden beds nearby.
 

2. New Plants Popping Up Far From the Parent

Another clear sign that blackberries send out runners is finding baby blackberry plants in spots where you never planted them.
 
These new shoots emerge from where a runner rooted itself, and they can appear surprisingly far from the original bush.
 

3. Root Nodes Along the Stem

If you lift a runner off the ground, you might notice small root nodes forming at the points where it touched soil.
 
These nodes are where the runner anchors itself and starts drawing nutrients to grow a new plant.
 

How to Control Blackberry Runners

Since blackberries send out runners so readily, keeping them in check takes a bit of effort, and here’s how to do it.
 

1. Grow Them in Containers or Raised Beds

One of the easiest ways to manage blackberries that send out runners is to plant them in containers or raised beds with barriers.
 
This physically stops the runners from spreading into unwanted areas and keeps the plant contained.
 

2. Install Root Barriers

If you’re planting blackberries in the ground, consider burying a root barrier around the patch.
 
A barrier at least 18 inches deep will stop runners from creeping outward, though you’ll still need to check for any that sneak over the top.
 

3. Regular Pruning and Digging

Routine maintenance is key when blackberries send out runners.
 
Cut or dig up any runners you spot before they have a chance to root firmly.
 
Spring and fall are good times to walk your patch and remove stray growth, and doing this consistently keeps the blackberry patch manageable.
 

4. Mow Around the Perimeter

Mowing the area around your blackberry patch is a simple but effective trick.
 
Since blackberries send out runners along the ground, regular mowing chops them up before they can establish new plants.
 

Do Blackberry Runners Affect Fruit Production?

Here’s a question a lot of growers ask: do blackberries send out runners at the expense of fruit?
 
The answer is generally no, but there’s a catch.
 
Runners are the plant’s way of expanding, and they don’t directly steal energy from fruiting canes.
 
However, if you let blackberries send out runners unchecked, the patch gets overcrowded, which reduces airflow and sunlight.
 
That overcrowding can lead to more disease and smaller harvests over time.
 
So while runners themselves aren’t the enemy, managing them keeps your blackberry plants healthy and productive.
 

So, Do Blackberries Send Out Runners?

Blackberries send out runners, and that’s simply part of how they grow and spread.
 
These runners are a natural survival mechanism that helps blackberries multiply through vegetative reproduction, especially in trailing varieties.
 
While they can be a nuisance if left unchecked, you can manage blackberries that send out runners with containers, root barriers, regular pruning, and perimeter mowing.
 
So embrace the runners or control them, but either way, now you know exactly why blackberries send out runners and what to do about it.