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'Navaho' blackberry plants are winter hardy to zone 6 and tolerate the heat and humidity of Southern gardens. In hot climates, harvest fruit in the morning and refrigerate as soon as possible.
Although related to a blackberry species considered to be a noxious weed – the Himalaya blackberry (R. armeniacus) which is an aggressive invasive species [8] – marionberries are not invasive because they do not readily germinate to grow new canes from seed. [11] They are commonly pruned and trained on trellises. [8] [11]
The characteristics of Rubus allegheniensis can be highly variable. [8] It is an erect bramble, typically 1.5 metres (5 feet) but occasionally rarely over 2.4 m (8 ft) high, with single shrubs approaching 2.4 m or more in breadth, although it usually forms dense thickets of many plants.
Rubus ursinus is a wide, mounding shrub or vine, growing to 0.61–1.52 metres (2–5 feet) high, and more than 1.8 m (6 ft) wide. [3] The prickly branches can take root if they touch soil, thus enabling the plant to spread vegetatively and form larger clonal colonies.
Empetrum nigrum is a low growing, evergreen shrub with a creeping habit. [4] The leaves are 3–6 millimetres (1 ⁄ 8 – 1 ⁄ 4 inch) long, arranged alternately along the stem. The stems are red when young and then fade to brown. It blooms between May and June. [5] It is usually dioecious.
Rubus ulmifolius is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name zarzamora.It is native to Europe and North Africa, and has also become naturalized in parts of the United States (especially California), Australia, and southern South America.
The fruits are compound drupes which change from bright red to black at maturity. Each section (drupelet) of a blackberry contains a single seed. Second year plants die after bearing fruits, but regrow from the underground portion of the plant. There are many species of blackberries, which are edible and differ by size. [6]
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