permaculture

[Robyn Francis <erda@nor.com.au>]

While trees should not be planted onto the dam wall, you can safely plant
into original (undisturbed) soil either side of the wall.
BTW too much shade will reduce productivity - it's solar energy that drives
the system especially in the littoral zone (edges 0-5ft depth).
Perhaps some floating swamp gardens might be the go to help keep
temperatures cool in summer and make sure the dam has enough depth for a
deep cool water layer.

Robyn



On 7/2/05 4:41 AM, "Paul Wheaton" <paul@richsoil.com> wrote:

> Let me try a slightly different approach ...
> 
> Can somebody suggest a tree for zone 5 that would provide really wide shade?
> 
> 
> 
> --- Paul Wheaton <paul@richsoil.com> wrote:
> 
>> I'm preparing to dig several ponds this year to raise trout.  I'm on the 
>> west
>> slope of
>> the rocky mountains about 50 miles south of the Canadian border.
>> 
>> I know that one of the big rules is to never plant trees on a dam.
>> 
>> I also know that if you want the pond to be cool (which trout require) it 
>> is
>> wise to
>> plant trees on the south side of the pond.
>> 
>> What if the dam is on the south side?
>> 
>> I suppose one could plant a tree that has a lot of spreading habbit and 
>> plant
>> those at
>> the dam edges.  Any suggestions on what variety of tree that might be?
>> 
>> I suppose that would be a really good place to build a dock.
>> 
>> Any suggestions?
>> 
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