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How & When To Prune Raspberry & Blackberry Bushes

How & When To Prune Raspberry & Blackberry Bushes - Nature Hills Nursery

Charlotte Weidner |

Whether it is to make jams and jelly, syrup, pies, and muffins, or just a handful on a bowl of breakfast cereal or in your smoothie, these delectable jewels right off the cane are a healthy fresh fruit that embodies summer itself!

The entire family of Caneberries, including Red and Gold Raspberries, Blackberries, and their cousins, like Black Raspberries, Dewberries, Salmonberries, Loganberry, Boysenberry and Thimbleberry, Marionberry, Blackcaps, Thimbleberries, Youngberry, plus a slew of other new hybrids - all produce delightful, healthy fruit!

Healthy Garden Jewels

bird it tree

High in Vitamin C, and folate, high in dietary fiber, and low calorie, these are high in bio-flavinoids and kid-friendly gems! Technically identified as aggregate fruits, these juicy, sweet-tart fruits form on woody, thorny branches called canes. There are erect, semi-erect, and trailing varieties, and some that are even thornless!

All have the Rose family’s well-known drifts of glorious white blossoms that are mildly sweetly fragrant, but some can have pink. They look like a cross between a strawberry bloom and an apple blossom and have a light sweet scent.

Plus these deciduous canes fill out in richly textured, deeply veined, pleated, and toothy lush green leaves to create lovely, if not prickly and heavily-armed, ornamental! They are both beautiful property division and privacy that feeds you! Not only is the fruit good for you, but the leaves of some varieties have been as tea.

The foliage is a vital caterpillar Host Plant for many butterfly and moth species. Plus you’ll have a love/hate relationship with local songbirds. Not only will you be providing them shelter and food, but you’ll be fighting them for the juicy berries. Luckily you can just plant one for them and a covered one for yourself!

But to keep your shrubs in check so they don’t outgrow your garden spaces, and more importantly, to keep those juicy treats appearing in the biggest, juiciest clusters, there are a few very important things to know about their care and pruning!

The Three Main Types of Canes

picking berries

The type of berry bush you have will determine when you can prune. Cane fruit plants can be broken down into three main types. Most brambles are perennial and each individual cane will bear fruit only once. Usually growing on a two-year cycle, the new shoots are called Primocanes, which are fall-bearing and last year's shoots are Floricanes.

Some members of the Rubus family bloom and fruit on those Primocanes, while others bloom and fruit on Floricanes. Others produce fruit on the tips of the Primocanes in the fall, then the bottom portion of the same Primocane will produce fruit in the 2nd season when it becomes the Floricane in summer - and these are called Everbearing.

Primocanes

A cane that comes from the roots in the spring is considered a first-year cane, Primocanes are the first or primary canes that appear in spring and fruits in autumn, also called fall-bearing. Sometimes only producing vegetative (non-fruiting) growth, sometimes these canes also produce fruit in the fall, on the branch tips.

Primocane varieties include:

  • Autumn Bliss
  • Polka
  • Royalty
  • September
  • Marion (Marionberries)

Floricanes

After winter, when new growth has begun, last year's canes that overwintered, are now called Floricanes. These bloom on last year's growth and are harvested in summer, hence their other name - summer-bearing.

Great Floricane varieties are:

  • Boyne
  • Cascade Gold
  • Triple Crown Thornless
  • Arapaho Thornless
  • Williamette

Everbearing

Everbearing cane shrubs have both Floricane and Primocanes on the same plant, allowing you to enjoy your first crop of berries in the summer (on last year’s Floricane) and then a second crop later that fall (on the Primocane branch tips)! Boysenberry bushes are one variety that has two great crops each year!

Some great Everbearing varieties include:

  • Prime-Ark® Freedom Thornless
  • Bristol Black
  • Fall Gold
  • Joan J
  • Bushel and Berry® Baby Cakes®

How to Prune Caneberry Plants

Pruning yearly means maintaining a vigorous, healthy plant that produces loads of big juicy berries! Take the ouch out of pruning your shrubs by having the right equipment.

  • Heavy Gloves
  • Long Pruning Shears
  • Hand Pruners
  • Long-Sleeved Shirt
  • Alcohol to Sanitize Your Shears
  • A few bandaids - just in case the thorns get you
pruning canes

Use clean and sharp garden shears to cut the two-year-old canes back to the ground. Removing the old canes keeps your plants clean, healthy, and easier to harvest. This way you are in a constant state of renewing new canes from the ground and removing the old wood that finished doing its job of making fruit.

Floricane Pruning

Berry plants that fruit on last year's canes (Floricane) can be pruned right after fully harvested. Those canes should be cut to the ground, leaving the new green shoots in place (Primocanes) that are already growing.

Fall trimming of the second-year Floricanes is useful for cleaning up the garden and promoting new shoots to grow the following spring. Removing these canes as soon as you are done harvesting will reduce the chance of disease overwintering with the plants.

Primocane - Spring Pruning

Spring cane pruning

Often spring pruning just involves pruning off anything that died back over the winter nipped off, winter or early spring, thin the first-year canes to four to six per plant, being sure to remove any that are damaged or diseased. Cut off the tips of the Primocanes once they have grown a few feet tall. Do this during the spring, before they start growing for 3 purposes:

  • To only remove the tips that fruited last fall on the everbearing varieties
  • To even up and encourage side shoots and larger fruit bringing uniformity to your plants
  • Improve fruiting and plant health

Pruning Everbearing Canes

Tipping or tip pruning is highly recommended. These produce a smaller amount of fruit on the tips of the Primocanes in the fall. For this type of berry, you should prune back the dead tips of the Primocanes after they produce in the fall, in addition to the trimming described above. Prune the tips back a couple of nodes below the dead portion of each Primocane.

How to Train Your Bramble

bramble raspberries

Different than pruning, there is also a bit of training needed, especially for young plants. Training involves positioning canes to make harvest easier, keep them from becoming tangled and allow sunlight penetration, and air movement. It also minimizes disease, removes dead branching, and helps prevent fungal issues.

Trellising is good for supporting new Primocanes and semi-erect varieties, especially with trailing varieties. Various trellising methods focus on separating Primocanes from Floricanes. Trailing varieties that are not trained or trellised can be allowed to ramble and spill over hillsides, retaining walls, and as a groundcover.

Branching that looks dead, or you suspect is diseased, remove it down to just past the living/healthy tissue. If you are unsure whether a branch is dead or not, perform a scratch test to see if the branch is still green beneath the bark. Snip the dead portion above it cleanly at a 45-degree angle. If the entire cane looks suspicious, simply cut that cane right to the ground and dispose of it.

Any time is also a good time to remove crossing branches or any cluttering/shading of the interior. Cutting out anything extra while securing new canes to a trellis or support.

Special Summer Treats!

We all love the big fat juicy summer gems that appear among thorny canes each year! Finding one of these delectable fruit bushes in the wild or while on a hike is a special treat. Having one or more growing in your own backyard only makes it better! Your pollinators and wildlife will agree!

Pick out your own backyard you-pick-it berry farm with one or more of the many fantastic fruiting cane bushes at NatureHills.com, or one of the many newer cultivars that are thornless and take the ‘ouch’ out of harvesting these incredibly healthy and delicious garden treats!

Let NatureHills.com and our #ProPlantTips for care help you keep your fruiting bushes looking, and producing, their berry-best!

Happy Planting!

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Frequently Asked Questions

How do you prune raspberry bushes for better fruit production?

Raspberries grow on a two-year cane cycle, so the key to better fruit production is removing spent canes promptly after harvest while leaving the new primocanes to develop and fruit the following season. In late winter or early spring before new growth begins, thin remaining canes to the strongest 4 to 6 per plant and cut them back to about 4 to 5 feet to encourage larger, more productive fruiting laterals. For everbearing varieties, you can cut all canes to the ground in fall for a single large summer crop, or selectively remove only the fruited tips for two smaller harvests. Keep up with annual pruning and training to trellises or support stakes to maximize sunlight penetration and airflow, which directly improves both fruit size and overall yield.

How do you prune blackberry bushes to keep them healthy?

Blackberry bushes grow on a two-year cane cycle, so proper pruning means removing the old fruiting canes (floricanes) at the base immediately after harvest while leaving the new first-year canes (primocanes) to overwinter and fruit the following season. In late winter or early spring, tip-prune your remaining canes back to about 4 to 5 feet to encourage lateral branching and larger fruit clusters. Throughout the growing season, remove any weak, damaged, or overcrowded canes to maintain good airflow and reduce disease pressure. Start by cutting out all canes that fruited this year, then head back the new growth in early spring before buds break for the best results next season.

When is the best time to prune raspberry bushes?

The best time to prune raspberry bushes depends on the type you are growing, but most pruning should be done either in late winter before new growth begins or immediately after the harvest season ends. Raspberries grow on a two-year cane cycle, so identifying whether your canes are first-year primocanes or second-year floricanes is essential before making any cuts. For most varieties, remove spent floricanes that have already fruited down to the ground after harvest, and save any late winter cleanup for shaping and thinning the remaining canes before spring growth kicks off.

When is the best time to prune blackberry bushes?

The best time to prune blackberry bushes depends on the type of cane, but a general rule is to remove spent floricanes (second-year canes that have already fruited) immediately after harvest in summer. New primocanes, which will produce next year's fruit, should be left in place and can be tipped back to encourage lateral branching. For most gardeners, a second light pruning in late winter or early spring before new growth emerges helps clean up winter damage and shape the plant. Focus your cuts on dead, damaged, or crossing canes first, then tip the remaining healthy canes back to about 4 to 5 feet to promote a strong, productive framework.

How do you prune black raspberries?

Black raspberries are pruned similarly to other caneberries, following a two-year cane cycle where first-year primocanes grow vegetatively and second-year floricanes fruit and then die. In summer, tip your primocanes at about 3 to 4 feet to encourage lateral branching and a stronger fruiting structure. After harvest, cut all spent floricanes down to the ground immediately, as they will not produce again. Each winter or early spring, thin remaining canes to the 4 to 6 strongest per plant and shorten laterals to 8 to 12 inches to maximize berry size and airflow.

How do you prune marionberry bushes?

Marionberry is a trailing blackberry hybrid that grows on a two-year cane cycle, meaning first-year canes (primocanes) grow vegetatively while second-year canes (floricanes) produce fruit and then die. After harvest, cut all spent floricanes down to the ground, as they will not fruit again. In late winter or early spring, thin your remaining primocanes to the healthiest 4 to 6 canes per plant and trim lateral branches back to about 12 inches to encourage bigger, more productive fruiting clusters. Train the remaining canes along a trellis or support wire to keep growth manageable and improve air circulation throughout the plant.

How far back should you cut raspberry canes when pruning?

When pruning raspberry canes, cut floricanes (second-year canes that have already fruited) all the way down to the ground after harvest is complete. For primocanes (first-year canes) on everbearing varieties, you can cut the top third of the cane back after the fall harvest to encourage a second flush of fruit, or mow the entire planting to the ground in late winter for one large summer crop. Always remove any weak, spindly, or damaged canes entirely, leaving only the strongest 4 to 6 canes per linear foot of row. Head into late winter or early spring to do your final cleanup before new growth begins.

How do you prune raspberry and blackberry bushes in the fall?

Fall pruning for raspberries and blackberries focuses on removing the spent floricanes, which are the second-year canes that have already fruited, cutting them down to ground level after harvest is complete. Leave the healthy first-year primocanes in place, as these will overwinter and produce next season's fruit crop. Thin the remaining primocanes to the strongest 4 to 6 canes per foot of row, and cut them back to about 4 to 5 feet tall to encourage lateral branching and bigger yields next year.

Should you cut back raspberry and blackberry canes after harvest?

Yes, you should cut back fruiting canes after harvest, but timing depends on the type you are growing. Most raspberries and blackberries grow on a two-year cycle, where new shoots called primocanes develop one year and fruit the next, so removing spent canes right after they finish fruiting keeps the plant productive and the patch manageable. After harvest, cut floricanes (the canes that just fruited) down to the ground to redirect the plant's energy into the new primocanes that will bear next year's crop. Prune out any dead, damaged, or crossing canes at the same time to improve air circulation and set yourself up for the best possible harvest next season.

How do you prune overgrown raspberry and blackberry bushes?

To tackle overgrown caneberry bushes, start by removing all dead, diseased, and old floricanes (second-year canes that have already fruited) by cutting them down to the ground. Thin the remaining primocanes (new first-year growth) to the strongest 4 to 6 canes per plant, spaced evenly for good air circulation. Do this rejuvenation pruning in late winter or early spring before new growth emerges, while the plant is still dormant. Once thinned, tip-prune the remaining canes back by 6 to 12 inches to encourage lateral branching and maximize your berry production.