Damon Mcknight
Blackberries are a perennial, semi-deciduous shrub that produces edible berries from late spring to early autumn. They are native to Australia and thrive in areas with high rainfall, particularly in bushland, forests, and along water bodies. Blackberries are also considered invasive in some regions due to their ability to form dense thickets. They are typically grown in home gardens and require full sun, slightly acidic soil, and regular watering. The berries are a tasty treat, often used in jams, pies, and other desserts, while the young leaves can be used in herbal tea blends.
| Characteristics | Values |
|---|---|
| Season | Late spring to early autumn |
| Regions | Victoria, Tasmania, Sydney Basin, areas with a cool winter |
| Rainfall | Grows in areas with over 760mm annual average |
| Soil | Rich, well-drained, slightly acidic (pH 5.5-6.5) |
| Sunlight | Full sun |
| Watering | Regular |
| Fertiliser | Animal manure, blood and bone, or complete fertiliser |
| Mulching | Organic, e.g. pea straw or lucerne |
| Growing structure | Trellis or growing wire |
| Spacing | 1m apart |
| Plant crown | At soil level |
| Harvest | November to April |
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What You'll Learn
Blackberry varieties in Australia
Blackberries are part of the Rubus genus, which also includes raspberries. They are perennial plants that grow in brambles. In Australia, blackberries are an aggregate of up to 20 micro-species, which all look very similar but react differently to herbicides and control measures. European blackberries (Rubus fruticosus aggregate) are a group of introduced species from Europe that are now considered invasive weeds in Australia. They grow in wetter areas where rainfall exceeds 700 mm and are highly invasive, quickly infesting large areas. They have been declared a Weed of National Significance due to their adverse impacts on agriculture, tourism, and native ecologies.
Despite being considered a weed, blackberry plants are also used for fruit and honey production. Blackberry foraging is a popular activity in Australia, and the fruits are used in jams, pies, purees, and crumbles. The young leaves are also used in herbal tea blends, and the young shoots can be eaten raw.
There are several blackberry varieties available in Australia, including both thorned and thornless types. Popular thornless varieties include 'Chester', 'Waldo', and 'Thornfree', which are heavy croppers and have big, sweet berries ideal for eating fresh or cooking. These varieties are self-fertile and can be planted against a trellis or taut wires to increase fruit yields.
Blackberries prefer a slightly acidic soil with a pH between 5.5-6.5 and require full sun and regular feeding. They should be planted in full sun, in rich, well-drained soil, and spaced about 1.5 meters apart and 10 cm deep. To encourage branching, prune the growing tips in summer, and cut out old canes in winter as they fruit on last year's stems.
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Ideal growing conditions
Blackberries are a sprawling, semi-deciduous shrub that produces delicious berries from late spring to early autumn. They can be highly invasive and are considered weeds in Australia. However, some thornless varieties like 'Chester', 'Waldo', and 'Thornfree' are popular and heavy croppers. Here are the ideal growing conditions for blackberries:
Soil and Sunlight:
Blackberries thrive in full sun and well-drained, rich soil with a pH between 5.5 and 6.5. Slightly acidic soil is preferable, and you can increase acidity by adding compost, manure, or powdered sulphur if needed. Before planting, prepare the soil by mixing in well-rotted animal manure, blood and bone meal, or a complete fertiliser. Space the plants about 1 metre apart, with the plant crown at soil level.
Watering and Mulching:
Blackberries require regular watering to keep the soil moist. They benefit from mulching in spring to conserve moisture during the hotter months and keep the roots cool. Spread an organic mulch like pea straw or lucerne around the plants.
Support Structures:
Blackberry canes need support as they grow, so it's best to plant them near a trellis or two rows of taut wire along a fence or between sturdy posts. Tie the canes to the support as they grow, and cut off any excess growth.
Pruning and Maintenance:
Blackberries fruit on second-year canes (floricanes). Once fruiting is finished, remove these canes by cutting them down to ground level. Retain the young canes (primocanes) that emerge during spring, as they will fruit the following year. Remove any runners or 'suckers' at the base of the plant, as they can be replanted elsewhere or discarded. Protect the canes from extreme heat, heavy winds, and birds by covering them with a net.
Climate and Rainfall:
Blackberries grow well in areas with cool winters and a climate that receives adequate rainfall (over 760 mm annual average). They are less likely to thrive in moderate or heavy shade or extremely dry conditions.
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How to plant and grow blackberries
Blackberries are sprawling shrubs with arching, prickly or thornless canes that produce edible berries from late spring to early autumn. They are easy to grow and produce a bountiful harvest. Here is a guide on how to plant and grow blackberries.
Location and Timing
Blackberries require full sun and well-drained, slightly acidic soil with a pH between 5.5 and 6.5. They should be planted in a sunny spot, about a metre apart, with the plant crown at soil level. You can improve soil acidity by adding compost, manure or powdered sulphur. The best time for planting is late February or early March, or during the winter when bagged, bare-rooted plants are available in stores.
Support and Maintenance
Blackberry canes need support from a growing structure like a trellis or taut wire. Tie the canes to the structure as they grow. Fruit forms on two-year-old canes, which should be removed once fruiting has finished. Young canes that emerge during spring should be left as these will fruit the following year. Remove any runners or 'suckers' around the base of the plant. Regularly water blackberry plants to keep the soil moist and spread mulch to help conserve soil moisture and keep the roots cool.
Propagation
To propagate blackberries through tip layering, dig a small hole near the plant within reach of a flexible, current-season cane tip. Bend and bury the tip of the cane into the hole, firming down the soil. You may need to use a U-shaped peg to hold the tip in place. Water regularly and roots should form within 8-12 weeks. You can then dig up and plant the new roots in a different location.
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Harvesting blackberries
Blackberries are a delicious treat, but their bushes can be a little tricky to manage. They are sprawling, semi-deciduous shrubs with arching, prickly or thornless canes that produce berries from late spring to early autumn. They are best harvested when fully ripe, for maximum sweetness. The berries are bite-sized and have a sweet-tart flavour. They can be eaten fresh off the cane, or used in baking and jams.
Blackberry bushes can be highly invasive, growing into a dense thicket of canes with many suckers at the base of the plant. They are best planted in full sun, with well-drained, slightly acidic soil. They require regular feeding and watering to keep the soil moist. They also need support, such as a trellis or wire construct, as the canes can grow up to 7 metres long and need to be tied up. They are self-fertile, so you only need to start with one plant. They grow well in cooler climates and are often found in areas with high rainfall, such as Victoria and Tasmania.
When harvesting blackberries, it is important to protect your hands and arms from the thorns, which can be quite savage. It is also a good idea to wear gloves, as the berries can stain your hands. Pick the berries by gently rolling them off the stem into your hand. They should come off easily when they are ripe. If they are still firm and do not come off easily, they are not yet ripe and should be left for a few more days.
To get the best yield from your blackberry bushes, it is important to prune them regularly. The canes only fruit in their second year, so once they have finished fruiting, they should be cut down to ground level. The young canes that emerge during spring will fruit the following year. These canes should be tied to the trellis or wire as they grow, and any excess growth should be cut off.
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Uses of blackberries
Blackberries are a versatile fruit with a range of culinary and medicinal uses.
Culinary Uses
Blackberries are commonly used in desserts, sauces, and beverages. They are a popular ingredient in pies, jams, smoothies, and salads. They can also be eaten raw or cooked, and are often used to make syrups, jellies, and preserves. Blackberries are a good source of vitamins, minerals, fiber, and antioxidants, making them a nutritious and tasty addition to any diet.
Blackberries can be stored unwashed in a breathable container in the refrigerator for up to a week. For longer-term storage, they can be frozen in a single layer on a baking sheet before being transferred to a freezer-safe container.
Medicinal Uses
Blackberries have a long history of medicinal use, dating back to ancient times. In traditional medicine, blackberries were used to treat various ailments, including children's diarrhea and ulcers. While scientific evidence for these remedies may be lacking, blackberries have been found to contain high levels of anthocyanins and other phenolic compounds with antioxidant properties.
Other Uses
Blackberry bushes can also serve as a hiding spot for rabbits, an important food source for both colonists and indigenous peoples.
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Frequently asked questions
Blackberries are in season in Australia from November to April.
Blackberries grow in areas with a cool climate and slightly acidic soil. They can be found in Victoria and Tasmania, particularly in bushland, forest plantations, along streams, and on grazing land.
Blackberries are perennial, semi-deciduous, prickly, and invasive plants that can grow up to 7 meters long. They have a main vertical root that grows up to 1.5 meters deep and numerous secondary roots that grow horizontally and then vertically down. Blackberry plants produce white or pink flowers in spring and summer, which develop into the blackberries.
To plant blackberries, prepare the soil by digging in well-broken-down animal manure, blood and bone, or complete fertilizer. Plant the blackberries in full sun, 1 meter apart, with the plant crown at soil level. Provide a trellis or wire construct to support the canes as they grow. Keep the plants well-watered and consider mulching in spring to conserve moisture in summer.
Yes, blackberries can be highly invasive in Australia, forming dense thickets of canes with many suckers. They are considered weeds in some parts of the country. However, the varieties available in nurseries are typically not classified as weeds.
