Wild Blackberry fruit not ripening

[Daca]

Hello,

I have some wild blackberry fruit that is not ripening well for 4 years now.


I have enclosed 3 pictures. Fourth picture is cultivated blackberry that is ripening well on the same land.
Wild blackberries stay like this till the end of the year, no progress once they reach the stage on the pictures.


Welcoming any ideas as well as insights if there is any way to try to correct it.

 

[Anniekay]

Are you pruning the wild blackberries in fall or early spring, or at all?.

 

[oneeye]

Blackberries need a period of cold temperatures, called the chilling requirement, to produce fruit. The amount of cold required varies by variety. They also need a lot of Sunlight to grow well and produce fruit. If Blackberries don't get enough water during the fruit set they will not produce well.

 

[gary350]

Blackberries are crazy plants they will grow in terrible soil and no amount of fertilizer or water makes them grow better. Better soil helps them grow a little bit better. Get some good soil toss it into the plants by the shovel full, several wheel barrels of better soil will help. Plants love full sun all day, hot blistering 100° sun 14 hours every day. My berries are very near 1" diameter. At the other house my berry patch was 5 ft wide 20 ft long lawn mower keeps runner plants cut down. Where we live now I made a mistake growing plants around a power line pole.

Are you sure your plants are blackberries and not black raspberries? When you pick a berry if stem stays attached to the berry it is a blackberry but if stem stays attached to the plant it is a raspberry. Blackberry and raspberry are in the same family and taste the same and grow the same according to what I read online the only different is the stem.

If you make 12" long cuttings in Dec. put rooting powder on cutting you can grow new plants in pots to be planted next summer.

In TN Cumberland Black Raspberries grow wild they are extremely hard to find. I found my plants 47 years ago and every time we move to another house I take raspberry plants with me. Berries are very large with few seeds. I like to pick berries when they are still a tiny bit red color tart berries make the best wine. I get 15 gallons of berries every summer and I made 28 gallons of wine this year.

 

[Meadowlark]

Is there any difference in how much direct sunlight the wild ones get vs the cultivated one?

 

[gary350]

Is there any difference in how much direct sunlight the wild ones get vs the cultivated one?

I have never grown thornless blackberries they probably like full sun and 100° hot weather too. I think everyone at the farmers market grows thornless.