How Do You Take Care Of Thornless Blackberries

Taking care of thornless blackberries is easier than you might think, and the reward is a steady supply of sweet, juicy berries without the scratchy canes.
 
Thornless blackberries are basically the same plant as regular blackberries, just bred to grow without those sharp thorns that make harvesting a pain.
 
This means you get all the delicious fruit with none of the bloody knuckles.
 
In this post, we’ll cover exactly how to take care of thornless blackberries so they thrive in your garden, from planting to pruning to harvesting.
 
Let’s get growing.
 

How Do You Take Care of Thornless Blackberries?

Taking care of thornless blackberries comes down to a few key things: sunlight, soil, water, pruning, and a little patience.
 
These plants are perennials, so once they’re established, they’ll come back year after year.
 
Let’s break down each part of thornless blackberry care so you can get it right from the start.
 

1. Give Them Full Sun

Thornless blackberries need at least six to eight hours of direct sunlight every day.
 
The more sun they get, the more fruit they’ll produce, and the sweeter those berries will taste.
 
If you plant them in partial shade, you’ll still get some berries, but the harvest will be smaller, and the fruit may be more tart.
 
So pick a spot in your yard that gets plenty of sunshine throughout the day.
 

2. Plant in Well-Draining Soil

Thornless blackberries don’t like sitting in soggy soil.
 
They prefer loamy, well-draining soil with a pH between 5.5 and 6.5.
 
If your soil is heavy clay, mix in some compost or aged manure to improve drainage and add nutrients.
 
You can also plant them in raised beds if your ground stays wet for too long after rain.
 
Good drainage is one of the most important parts of taking care of thornless blackberries because wet roots lead to root rot, and root rot kills plants fast.
 

3. Water Consistently

Thornless blackberries need about one to two inches of water per week, either from rain or from you.
 
The key is consistency.
 
Don’t let the soil dry out completely, but don’t drown them either.
 
During hot, dry spells, you’ll probably need to water them every few days.
 
A good rule of thumb is to water deeply once or twice a week rather than giving them a light sprinkle every day.
 
Deep watering encourages strong root growth, which makes your thornless blackberries more drought-tolerant over time.
 

Pruning and Training Thornless Blackberries

Pruning is where a lot of people get confused, but it’s actually pretty simple once you understand how blackberries grow.
 

1. Understand the Two Types of Canes

Thornless blackberries produce two kinds of canes: primocanes and floricanes.
 
Primocanes are the new canes that grow in the first year.
 
Floricanes are those same canes in their second year, and that’s when they produce fruit.
 
After a floricane finishes fruiting, it dies and won’t produce again.
 
So you need to cut those dead canes out to make room for new ones.
 

2. Prune After Harvest

The best time to prune thornless blackberries is right after you finish harvesting.
 
Cut back the floricanes that just fruited all the way to the ground.
 
Leave the new primocanes alone because they’ll be your fruit producers next year.
 
This keeps your patch from getting overcrowded and helps prevent disease.
 
If you skip pruning, your thornless blackberries will turn into a tangled mess, and your harvest will shrink year after year.
 

3. Train Them on a Trellis

Thornless blackberries grow best when they’re trained on a trellis or fence.
 
This keeps the canes off the ground, improves air circulation, and makes harvesting way easier.
 
A simple two-wire trellis works great.
 
Just weave the canes through the wires as they grow and tie them loosely with garden twine if needed.
 
Training also helps you see which canes are primocanes and which are floricanes, so pruning becomes much less of a guessing game.
 

Fertilizing and Mulching Thornless Blackberries

Feeding your thornless blackberries at the right time gives them the energy they need to produce a big crop.
 

1. Fertilize in Early Spring

Apply a balanced fertilizer, like a 10-10-10, in early spring just as new growth starts to appear.
 
Don’t overdo it with nitrogen because too much nitrogen gives you lots of leaves and very few berries.
 
If you’re not sure how much to use, follow the label instructions based on the size of your plants.
 
A soil test can also tell you exactly what your thornless blackberries need.
 

2. Mulch to Retain Moisture

Spread a two to three inch layer of mulch around the base of your plants.
 
Straw, wood chips, or pine bark all work well.
 
Mulch helps the soil hold moisture, keeps weeds down, and keeps the roots cooler during hot summer days.
 
Just keep the mulch a few inches away from the canes themselves so you don’t encourage rot.
 

Pest and Disease Care for Thornless Blackberries

Thornless blackberries are pretty tough, but they can still run into a few problems.
 
Watch for aphids, spider mites, and spotted wing drosophila, which is a small fruit fly that lays eggs in ripening berries.
 
Good air circulation from proper pruning and trellising goes a long way in preventing disease.
 
If you see signs of fungal issues like rust or anthracnose, remove affected canes and dispose of them in the trash, not the compost pile.
 
You can also apply a fungicide labeled for blackberries if problems persist, but always follow the instructions carefully.
 

So, How Do You Take Care of Thornless Blackberries?

Taking care of thornless blackberries means giving them full sun, well-draining soil, consistent water, and regular pruning.
 
It’s really not complicated once you understand their growth cycle.
 
Plant them right, train them on a trellis, feed them in spring, and prune out the old canes after harvest.
 
Do that, and your thornless blackberries will reward you with buckets of sweet fruit every summer for years to come.
 
Hope this post has helped you learn how to take care of thornless blackberries so you can enjoy a thorn-free harvest season after season.