On Sat, 16 Apr 2016 16:50:28 -0400, S Viemeister
> wrote:

>On 4/16/2016 4:15 PM, Je?us wrote:
>> On Fri, 15 Apr 2016 17:54:09 -0400, Dave Smith
>> > wrote:
>>> Unfortunately, the previous owner had planted a row of black
>>> walnuts near the garden. They were doing very well and after a few
>>> years the garden failed and I discovered that black walnuts are toxic
>>> too gardens.
>>
>> Are they? I wonder if they make the soil acidic or what.
>>
>Their roots produce a substance called juglone, which is toxic to many
>(but not all) plants.

Oh, I see. Thanks for that, Sheila. They are not at all common around
here.