Black walnut/White Pine
 

"kate" wrote in message ...

kate wrote:
I am still wondering though how far the walnuts need to be from pines to
keep from harming the pines.

Kate

The problem from Black Walnut is not from the roots, but from the alliopathic compound (Juglans
IIRC) that is contained in the leaves and the hulls of the nuts. This compound leaches out into the
soil and prevents other plants from germinating or from growing well (or at all). Any other plants
that are much beyond the drip line of the Black Walnut trees should have no problem.

Bob Weinberger

Black walnut/White Pine
 

Bob Weinberger wrote:

"kate" wrote in message ...

The problem from Black Walnut is not from the roots, but from the alliopathic compound (Juglans
IIRC) that is contained in the leaves and the hulls of the nuts. This compound leaches out into the
soil and prevents other plants from germinating or from growing well (or at all). Any other plants
that are much beyond the drip line of the Black Walnut trees should have no problem.

Thanks - Juglone was the culprit mentioned, but the first mention was
the roots, as well as the leaves and hulls.Is it safe to assume that the
roots wouldn't extend further than the drip line?

Kate

Black walnut/White Pine
 

"kate" wrote in message ...

Thanks - Juglone was the culprit mentioned, but the first mention was
the roots, as well as the leaves and hulls.Is it safe to assume that the
roots wouldn't extend further than the drip line?

Kate

The roots can extend beyond the drip line, but unless it is a fairly dry site, it is not common for
Black Walnut roots to extend much beyond it.

Bob Weinberger

Black walnut/White Pine
 

"kate" wrote in message ...

So to complete my education (and thank you very much sir), would a young
(say 1-5 year old) black walnut pose no threat to white pines as long as
they were a few feet outside the drip line? Should I be concerned about
walnuts amid the pines in my micro forest in the making?

Kate

1-5 yr old Black Walnut pose little threat to established White Pine - I believe you said that the
pine were 15 years old. I would, however, leave about 20 feet between the pine and walnut stems to
give both room to grow over the years. Remember that, although the drip line of the walnut is only a
couple of feet or so in diameter now, it could easily be 30-40ft in diameter 20 yrs from now.

Bob Weinberger

Black walnut/White Pine
 

Before long, that white pine, if it's only 15' from the walnut- will overtop
the walnut and slow it's growth- so you may need to prune heavily the pine
on the side of the walnut until it develops a full crown.
--
Joe Zorzin
http://www.forestmeister.com

"Bob Weinberger" wrote in message
...

"kate" wrote in message
...

So to complete my education (and thank you very much sir), would a young
(say 1-5 year old) black walnut pose no threat to white pines as long as
they were a few feet outside the drip line? Should I be concerned about
walnuts amid the pines in my micro forest in the making?

Kate

1-5 yr old Black Walnut pose little threat to established White Pine - I
believe you said that the
pine were 15 years old. I would, however, leave about 20 feet between the
pine and walnut stems to
give both room to grow over the years. Remember that, although the drip
line of the walnut is only a
couple of feet or so in diameter now, it could easily be 30-40ft in
diameter 20 yrs from now.

Bob Weinberger