Rubus fruticosus

What are Blackberries?

Blackberry plants grow stems covered in vicious backwards-pointing thorns, to deter grazing animals. They do a good job of deterring humans too, so spiky clumps of blackberry can deny access to large areas when they get established. The stems, or canes, can grow up to 7 metres long, arching out and forming large tangles.

The tasty blackberry fruits are the easiest key to identification! Clusters of blackberries begin to develop in November and ripen from late summer into autumn.

Blackberry is one of those supremely successful weeds that employs several different methods of spreading itself, enabling it to quickly grow into a huge clump.

  1. Blackberry plants form a dense root system of rhizomes, which expands underground.
  2. Blackberry stems can 'layer', or take root wherever they touch down on the ground.
  3. Birds love succulent blackberry fruit, which is packed with seeds. Once eaten, these seeds travel by 'airfreight', meaning they can be deposited some distance from their parent plant.

How to Control Blackberries

Blackberry leaves have a waxy outer layer that prevents weedkillers from penetrating into the leaf, which dramatically reduces weedkiller effectiveness. Complete control of blackberry with herbicide can be achieved by adding a penetrant to a weedkiller application.

Yates Zero Tough Heavy Duty Weedkiller is the easiest solution to kill blackberry, as the formulation already contains a penetrant. Zero Tough is extremely effective at controlling blackberry, roots and all. It's purpose-designed to kill the toughest, most invasive weeds and grasses (including ivy, gorse & bamboo).

Alternatively, use Yates Zero Super Concentrate Weedkiller and add Yates Zero Pulse Penetrant into the mix before spraying. Zero Pulse Penetrant improves the spread, adhesion and absorption of weedkillers by waxy-leafed or hard-to-wet plants, allowing the weedkiller to work to its full potential.

Pro Tip: If you keep blackberry plants for a berry harvest, covering the fruiting canes with bird netting is a win/win. It prevents birds from spreading seed far and wide, plus you end up harvesting all the berries.


Recommended Products

Yates Zero Pulse Penetrant

Improves the penetration, spread and adhesion of Yates Zero Weedkillers on difficult to kill weeds with waxy or hard to wet surfaces.

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