here in Bartlesville, clarify something for me please. I have uncovered what I believe to be a Hilmalaya Blackberry patch that has been smothered in a dense wooded area. Your instruction read as follows: Spring--cut canes back to 24 inches. I did not do that this spring as all canes are now first year growth. Next spring does that mean to cut all bushes back to 24 inches? This fall all of the canes are new and I plan to let them grow and clean up the patch next fall per your directions. Is that correct? Hopefully the girls will get to pick some berries one day. Thanks, Bob Korthase
Some pruning should be done every spring to keep the plants from becoming tangled and to improve their ability to bear. Prune trailing blackberries in the spring for good growth habits. Prune each main cane back to 3-4’. Then cut back side branches to about 12”, leaving five or six buds on each. Erect and semi-erect varieties should be tipped or cut back to 3-4’ in midsummer. This forces lateral branches to emerge from buds below this point.
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm
The white on the plants is Seven Dust, to treat the Japanese beetles.
Blackberry plants do not fruit the same year they are planted. Primocanes appear in the first year and remain into the second year when they become floricanes, which produce flowers and fruit.
This article will help you with Japanese Beetle issues.
https://www.gardeningknowhow.com/plant-problems/pests/insects/japanese-beetles.htm
Canes are in good condition and I don't see any insect damage. The damage is on my thornless variety primacanes grown in hot and humid central Virginia. Images show the progression.
That appears to be a severe calcium deficiency! This can be resolved quite easily, though.
DOLOMITIC LIME will provide, both, calcium and magnesium to the plant. Adding IRON SULFATE will help acidify the pH of the soil from treatment, as well as provide sulfur, iron, and is a good preventative for fungal infections.
This article will help you to care for Blackberry plants: https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm
I think they are thimble berries because they are quite large and look like a thimble
I have a trumpet bush/tree that has since collapsed and I have cut it down. Now the runners are everywhere. How do I get rid of this dilemma?
As my first attachment shows, I cut off the old part of this shrub, which only produced a very few scrawny berries this year. I was advised to prune that part off. But should I cut it it all the way down to the trunk? The Traveler blackberry must be different from the old ones we had before they died out. They gave tons of berries (every other year would be an “off” time for them) and we could wait until spring to cut off the dead canes. That seemed fine for them. But this shrub has had 2 sections, the tall side that stands about 6’ in height but has never borne berries, and the other part that spread outward but did produce a few berries. This Drought we are currently dealing with in S. Indiana has everything shriveled, not just the berry shrub. So disappointing. — The second picture shows blossoms on the 6’ part of the shrub. Should I expect any fruit anymore this season, even if it’s only a handful?
If you have applied all other care to no avail, then the last explanation will be a disease. Unfortunately, blackberries have many diseases, and most of them do not show symptoms except for lack of production.
This article will explain in more detail: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm
How big a container and what mix of growing materials
This article should help:
https://www.gardeningknowhow.com/edible/fruits/blackberries/container-grown-blackberries.htm
I'm a senior and I've tried every way to hack, poison, damage, and anything else to these big nasty blackberry bushes. They quickly grow back; if I battle them myself I get poisoned by the unavoidable thorns, very badly., I can't afford to hire some company to do it over and over. I am partially disabled. Isn't there a trick of putting heavy objects, lots of lumber, right ON THE BUSHES. SO THEY CANT GET AIR? Hey, like a big order of gravel!? does THAT WORK? DOES this also work for rose bushes? Round up is now categorized as causing cancer. ---it's so darn stupid to use, I can't even get the system to work! Also, the spray gets in the wind and blows back on you. PLEASE LET ME KNOW. THANKS! in Eugene Oregon
It sounds like you are dealing the the invasive Himalayan blackberry. Covering blackberry will force the roots to grow outside the lumber or gravel area. It will not kill them. Links to articles on control follows: https://www.gardeningknowhow.com/edible/fruits/blackberries/invasive-blackberry-control.htm
https://ask.extension.org/questions/450490