Thornless Blackberry

I bought a thornless blackberry plant early this year from Wilkinson shop. but now found there are thorns growing on the vines?

Am I cheated?

anyone have the thornless blackberry plant? what is your one look like please?

afraid so,i was given a cutting last month,no thorns

I think sometimes the thornless bit is grafted onto a normal bramble root, so you can get some thorny suckers from a thornless variety (I do on my massive thornless bush). Perhaps the thornless bit has died and only the bramble bit is alive?

CORRECTION - I looked this up an wikipedia and it looks like its not grafted, it's the plant reverting back to its natural condition - apparently the inside of the stem is genetically thorny and the outside is genetically thornless!

savbo

I have just cut off  the thorny branches and left the roots, hoping something thornless come out next. I might have killed it off, not sure! wish I read your post before cutting it. thanks everyone

No thorns at all on my 2 thornless plants,but the branches are very weak,you can`t bend them round to be tied pointing anywhere else

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If my thornless one starts to grow thorny stems I shall cut them off too I think 

Don't

Just let them grow for a year and next year they'll grow thornless.
If you cut them back now they will produce nore thorny shoots as you will be stressing them.

Cut them back in the Autum/Winter when they have died back.

Thanks for that Stompy.

So far they are both OK (one moved from my Dad's garden and cut back hard so just has this year's growth, and one bought for £1.99 in Aldi in the Spring, which has growths on it about 6-8ft long)
I'll know what to do if they revolt