Pruning black stems

Description of your first forum.

Pruning black stems

Post by Thomas A. Gra » Thu, 25 Apr 1996 04:00:00



I (sort of) finally found the time to prune my roses back for
spring growth.  I found that 2 of them, the canes are partially
black.  There would be a few inches of green, then black then
green then black agagin.  Should I just prune down just below the
lowest black section?  Normally I wouldn't give this a second
though (I'd just prune it) but in doing so this time, I would end
up pruning my currently 3-4' bush to 3-4" something.  Should I
just go ahead.  Thanks.

-- sylvia

 
 
 

Pruning black stems

Post by Kay Cange » Sun, 28 Apr 1996 04:00:00



Quote:

> I (sort of) finally found the time to prune my roses back for
> spring growth.  I found that 2 of them, the canes are partially
> black.  There would be a few inches of green, then black then
> green then black agagin.  Should I just prune down just below the
> lowest black section?  Normally I wouldn't give this a second
> though (I'd just prune it) but in doing so this time, I would end
> up pruning my currently 3-4' bush to 3-4" something.  Should I
> just go ahead.  Thanks.

You mean hybrid teas are supposed to be more than 4" tall after spring
pruning? What a strange concept!! I assume you don't live in zone 5.
Funny, they always seem to grow back.

Kay Cangemi
New York, USDA zone 5

 
 
 

Pruning black stems

Post by Leigh Anne Dea » Tue, 30 Apr 1996 04:00:00



Quote:
>I (sort of) finally found the time to prune my roses back for
>spring growth.  I found that 2 of them, the canes are partially
>black.  There would be a few inches of green, then black then
>green then black agagin.  Should I just prune down just below the
>lowest black section?  Normally I wouldn't give this a second
>though (I'd just prune it) but in doing so this time, I would end
>up pruning my currently 3-4' bush to 3-4" something.  Should I
>just go ahead.  Thanks.

>-- sylvia

**************************************************************************
Sylvia, I've experienced the same problem this year, and this only being
my third (but first real knowledgeable) year at growing roses I'm
horrified at some of the things I've felt I had to do.

For instance, amputation of a once healthy cane that fits your
description. It's not any kind of blight or canker.  I throw a temper
tantrum when I have to do this and I've had to it this year much more so
than last.  And, it's always on new bareroot roses who start out real well
then blouey - a cane begins to crater on me.  Next year I'm going begin
purchasing own-root stock.  My *** pressure can't take budded stock
anymore.

Leigh Anne
Houston

 
 
 

Pruning black stems

Post by Bugma » Tue, 30 Apr 1996 04:00:00


Quote:



> > I (sort of) finally found the time to prune my roses back for
> > spring growth.  I found that 2 of them, the canes are partially
> > black.  There would be a few inches of green, then black then
> > green then black agagin.  Should I just prune down just below the
> > lowest black section?  Normally I wouldn't give this a second
> > though (I'd just prune it) but in doing so this time, I would end
> > up pruning my currently 3-4' bush to 3-4" something.  Should I
> > just go ahead.  Thanks.

> You mean hybrid teas are supposed to be more than 4" tall after spring
> pruning? What a strange concept!! I assume you don't live in zone 5.
> Funny, they always seem to grow back.

> Kay Cangemi
> New York, USDA zone 5

Kay: I think that what Thomas Gray was refering was about pruning the
plants from 3-4' down to a few inches above the bud union. My
recommendation is that you should never cut into diseased or even dead
canes without sterilizing your cutting tools. If I find the blackened
canes that Thomas refered to I would go at least two inches below the
lowest blacken area and cut into healthy wood above a outward pointing
bud eye. If you need to go that low, so be it.

Thomas should also have told us where he has his rose Garden as very
often this makes a big difference as to how we answer a question.

 
 
 

Pruning black stems

Post by Domstcgd » Tue, 30 Apr 1996 04:00:00


I have the same problem--with an addition.. before the spots turn black,
they turn bright fuschia red.  And.. it seems to only affect the previous
years roses??

I have pruned these bushes approximately 3-4 times each?? What gives??
Everytime I get all the affected growth, my roses look nice and clean and
then 2 weeks later Poof!  Its back.

If anyone has any idea of what this is or why it's hapening, I would also
appreciate the info!

Kathleen
Zone 6 NJ

 
 
 

Pruning black stems

Post by PetRo » Wed, 01 May 1996 04:00:00


What the heck is all this sensitivity to removing dead canes? Dead is dead
- get the dead stuff out of the way to make room for the living. Miracle
Max, as best I can tell, has yet to take up rose growing.

 
 
 

Pruning black stems

Post by Bugma » Sat, 04 May 1996 04:00:00


Quote:

> I have the same problem--with an addition.. before the spots turn black,
> they turn bright fuschia red.  And.. it seems to only affect the previous
> years roses??

> I have pruned these bushes approximately 3-4 times each?? What gives??
> Everytime I get all the affected growth, my roses look nice and clean and
> then 2 weeks later Poof!  Its back.

> If anyone has any idea of what this is or why it's hapening, I would also
> appreciate the info!

> Kathleen
> Zone 6 NJ

Kathleen: I have no idea what this could be without having a specimen in
front of me where I can diagnose it for the pathogen.

Just guessing, I have seen black spot that starts that way but I
never seen black spot kill the whole cane. There is also
bacterial blast which can work really fast specially in the
winter and spring months following low temperatures and wounding
of the plants (pruning?) has taken place. Bacterial blast is the
only one which I know would turn a normal looking cane into a
black cane. This can be easily diagnose by the smell and by the
mushiness of the cane. Again, these are just guesses. Our plant
pathologists can very easily diagnose any rose disease with the proper
sample.

 
 
 

Pruning black stems

Post by David LaMo » Sun, 05 May 1996 04:00:00


Kay was concerned about hard pruning (to 3"-4")..sometimes it is necessary,
and a hard thing to do.  It will delay your first flush of roses a few weeks
THIS year, but it is VERY worth it.

If treated properly, all you will get is at least 4 new canes, fresh and
disease free (be sure to follow Bugman's advice), and a deeper root system.  
And next year, you will have lots of good 1-year canes to choose from.

When I rejuvanate rose bushes, I always prune away ALL disease, even do a
light root pruning, if I'm transplanting, put it in rich fresh soil, and in
no time, a whole bunch of new canes are starting up from where they should be
- just above the graft union.

The only problem is suffering through all the neighbors that think you are
really losing your mind and that the pruners should be taken away from you!

Show no mercy to disease.

Sharley

 
 
 

Pruning black stems

Post by PetRo » Mon, 06 May 1996 04:00:00


A thought occurred to me as I expressed it while working on a friend's
rose at the show that a "non-chemical" approach to disease control which
is not often mentioned but has value lies in the careful use of our trusty
secateurs.