Navaho Summerlong

Navaho Summerlong is a floricane-fruiting thornless blackberry variety, made by Lubera AG with Navaho and Loch Ness crossing. Stems are not too long, about 1,5-2 m in length, erect.
The flowers are very nice and attractive, slightly pink at first but opening up to pure white.
Fruit production begins mid to late July and lasts well into September (4-6 weeks). Summerlong bears 3-5 kg of fruits (and up to 10 kg on good soil with right fertilizer). Berries are average sized, slightly elongated, very sweet when fully ripe. Median weight is 5-6 g. The fruits are dark and shiny, and held away from the foliage.
One disadvantage of Navaho Summerlong is that it will throw up suckers over 1 m from the crown so you need to be ready to cut those down as soon as they appear. Without this regular pruning the plant can spread a large distance over a couple of years. Also Navaho Summerlong is poorly suited to heavy soils or containers (pots) as it is rather susceptible to root rot, causing loss of vigor and cane dieback like its parent plant Loch Ness from which it's a hybrid cross as the other Navahos.
Resistance to low winter temperatures is about minus 15 C.