Alan, the high-sky sun is from around 10AM to 2PM (there is not too much difference in intensity in that period) but the air is much warmer in the 12-2 part making it overall the most stressful period for plants not happy in heat. So, shading in that period alone would be the ideal I would say, or maybe until 3PM. The number of planting spots with such shade is few however; it is much more common to find a spot with morning but no afternoon sun and so I think that is why people talk about afternoon shading. I had some currants in a spot with only morning sun and they were very happy. I also had some ribes in a spot with more shade and they were not happy there. Given my good luck with my morning sun planting I have put in a new ribes planting this spring which gets sun from morning to noon. Scott zone 6/7 Maryland |
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