Answer: Sun and shade definitions are tricky because time of day is also important. The morning sun is cooler than the afternoon sun, so plants that prefer full sun to partial shade will do well there if the sun hits it all morning long. Plants needing shade to partial shade will also grow there if the soil is moist enough.
Plants that prefer full sun will often grow fine on both the south and west sides of the house, even though the west side receives only afternoon sun.
The west sun is too hot for plants that need shade or partial shade.
A qualifier to the above is if you have any trees or neighboring buildings that shade the areas; at that point a little experimentation is usually needed to see what will do best.
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