Blackberry (Rubus) Loch Ness The Blackberry Loch Ness is easy to grow and ideal for smaller gardens. This self-fertile Rubus produces firm, glossy-black conical fruits on its short, upright thornless canes. Known for being a heavy cropper; the Blackberry Loch Ness can yield up to 3.6kg (8lb) of fruit per bush, which can then be harvested mid-August until the first frosts. This superb Blackberry will certainly provide tasty fruits for making jam or adding to desserts. Container has grown rather than field-grown, to provide stronger and more efficient plants – Height: 2m (6’) Spread: 2.5m (8’).