Sharppa:

I have always considered morning sun to be superior to afternoon sun for a couple of reasons. Many fruiting plants, particularly those like grapes and berries, benefit from quick drying of overnight dew or rain showers to help control fungal diseases. I also believe, but cannot prove, that morning sun provides more light in the beneficial UV spectrum, while afternoon sun has more IR light, which is mostly heat. This could be a debatable point, and we may see it debated.

As for trellis materials, there are any number of options, including hardwood, steel pipe, plastic pipe, and on and on. The beauty of an installation depends on how carefully it is planned and executed, although with fruiting plants beauty is not normally the primary consideration. While the common green fence post may not be aesthetically perfect, it is hard to beat for practicality and ease of installation. Raspberries often require minimal support if they are kept pruned down to 4 feet or less, which is better for productivity as well.

Don Yellman, Great Falls, VA

sharppa-
I too like morning sun for the reasons that Don mentioned... though, perhaps it's because he taught it to me!

If you look at my "My Page", you'll see how I make my trellises out of iron pipe.

-Glenn

Don's right as usual. Drying off the dew makes a big difference in fungus control. Also, during the summer months, the trees will be able to use the sun better as the stomates close when temps get around 90 and above.

Morning sun will help with frost protection as it will warm the plants sooner after a frost event.

Ditto, for morning sun.