Navaho Summerlong blackberry variety

Rating [ 5 ]

Fully thornless erect-growing cultivar with long period of harvesting and high yield

Plants are

Plants are thornless

Bushes have

Bushes have erect canes

Fruit weight is

Fruit weight is 5 g


Berries have a oblong shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Flowering on floricanes starts in the

Flowering on floricanes starts in the fourth week of May

Ripening date (regular) -

Ripening date (regular) - third week of July

Productivity is

Productivity is 4 kg per plant

Cold hardiness is

Cold hardiness is moderate

Country of origin

Country of origin - Switzerland

Current status

Current status - cultivated (actual)

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.

Useful Growing Guides

Useful Growing Guides:

Navaho Big And Early
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Navaho The Big Easy
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Reviews of the variety Navaho Summerlong


Markus Kobelt, the founder and breeder of the Swiss fruit tree nursery Lubera, talks about how you can see the difference between the BigandEarly and the Summerlong.

Review from [LIDIA ȘOM]


Review from [N. CLEGG]

I've trialed a lot of thornless blackberry cultivars and the best/most promising is the Navaho Summerlong as stated on this great site which knows its stuff.

The Summerlong is superior to the other Navaho types which I found to be quite late in ripening, prone to chlorosis, and flowers can be damaged by heavy showers or fail to open due to aborted pollination. Both the Navahos Bigandearly/Original can suffer badly from white drupelets from sun scorch. The canes in Bigandearly can break off from the base easily whilst the original suckers all over the place. Only ever seen this brittleness in Waldo previously.

The blackberry Navaho Summerlong suffers none of these problems(apart from the odd white druplet now and again which happens in just a few early ripening berries after rain shower then a sunny period.

It is very disease resistant and is the most compact season ripening blackberry I've ever seen- mid July to mid Sept or sooner and it is done whatever weather conditions. Best I've seen to date.

Review from [FRED]

I purchased the modern blackberry Navaho Summerlong early last year after grubbing out all my other thornless blackberries which ripened in late Aug.

The large white flowers were pretty to see and a bee magnet. It proved to be an excellent cropper of sweet firm berries of a good size in mid July onwards. It put out 3 more canes in mid summer. Now it is growing nicely with lots of shoots opening on the canes. Expecting a big crop of blackberries!

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