Evergreen Thornless blackberry variety

Rating [ 4 ]

This trailing blackberry has attractive lacy leaves and produces small sweet fruit in late summer and autumn

Botanical designation

Rubus subgenus Rubus 'Evergreen Thornless'

Originated from a cross of

Originated from a cross of Rubus laciniatus

Variety denomination

Variety denomination - 'Thornless Evergreen'

Plants are

Plants are thornless

Bushes have

Bushes have trailing canes

Fruit weight is

Fruit weight is 4 g

Shape

Berries have a rounded shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Flowering on floricanes starts in the

Flowering on floricanes starts in the first week of July

Ripening date (regular) -

Ripening date (regular) - fourth week of August

Soluble solids

Soluble solids - 15.0%

Acidity

Acidity - 1.2%

Cold hardiness is

Cold hardiness is excellent

Heat tolerance is

Heat tolerance is moderate

Country of origin

Country of origin - United States

Current status

Current status - obsolete or rarely used


The cultivar named Evergreen (also known as  Oregon Thornless) was grown commercially for many years before it became obsolete. This trailing blackberry has lacy leaves and produces small, sweet fruit in late summer.
Evergreen is a wonderfully ornamental plant grown on a trellis with very pretty white (pinkish) flowers in July and small berries from 3 to 6 g in the late summer and beginning of autumn. Harvest season ends at the middle of October. Bushes are very vigorous and thornless, but numerous replacement stems often have thorns. Fruit are firm and sweet, have good aroma. Blackberry Evergreen Thornless (Oregon Thornless) often used as decorative fence like maiden grapes. Great for growing in a big container and very hardy. Winter and disease resistance are great, Evergreen can be cultivated without shelters.

Diseases resistance

What diseases is blackberry Evergreen Thornless resistant to?

Evergreen Thornless has very good resistance to diseases such as Septoria Leaf and Cane SpotVerticillium Wilt
Diseases susceptibility

What diseases is blackberry variety Evergreen Thornless vulnerable to?

Evergreen Thornless is quite prone to diseases such as Crown GallOrange RustFire blightSpur Blight or Purple Blotch (Didymella Applanata)Stamen blight
Useful Growing Guides

Useful Growing Guides:

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Reviews of the variety Evergreen Thornless

Review from [WANDER VAN LAAR]

Rubus fruticosus 'Thornless Evergreen' (Braam 'Thornless Evergreen', Doornloze Braam)
Thornless Evergreen. Doornloze Braam met diep ingesneden blad en purperrode twijgen, Hoogte: 200 cm., Standplaats: zon, Plantafstand min. 1.25 cm., Rijptijd: half augustus - half september. Bijzonder: groenblijvend en lage soort. Moet goed rijp geplukt worden anders valt de smaak tegen. 
 

Review from [GUEST]

Oregon Thornless or Thornless Evergreen gives big crops each year of medium sized firm fruits from mid Aug until Oct. Being a natural occurring form of the invasive cut leaf evergreen blackberry or Rubus laciniatus, it retains its thornlessness in the outer layer only, so take care not to damage its roots and remove any thorny suckers you see. There seems to be widespread variability in sold forms of Thornless Evergreen regarding fruit size, flower colour etc.

The Everthornless clone of it (retains thornlessness from its roots) has never gained wide popularity outside of commercial plantings other than Oregon U.S as it is prone to rust and is rarely offered publicly; plus it retains thorns on the bottom two feet of the plant! Some Thornless Evergreen variations sold could be this Everthornless type crept into the mix by mistake. But to most the Thornless Evergreen is still superior for the amateur fruit grower.

Highly recommended for its attractive appearance. Great for growing in a big container and very hardy. Relatively cheap and easy to find too in most garden centres.


Review from [M.DAVISON]

I've come to the conclusion that Oregon Thornless and Thornless Evergreen blackberry plants are not the same cultivar after growing both. The Oregon has small fruits and ripens end of Aug onwards, whilst the Thornless Evergreen is mid Aug onwards or even sooner with much larger fruits and more attractive pinkish flowers.
I have never seen thorny suckers from the Thornless Evergreen in 10 years of growing it, but the Oregon became a thorny mess after just a few years from planting, so I had it removed. I don't know why these are referred to as the same plant? So confusing!

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