Answer: Sometimes it is hard to decipher plant tags but the following usually holds true: If a tag says sun/part shade it means the plant will grow in full sun and will tolerate a few hours of afternoon shade. If a tag says shade/part sun it usually does best with full shade or with a few hours of morning sun and shade in the afternoon. You're right, afternoon sun is always more intense than morning sun so reserve those plants which will grow in either full sun or part sun for the hottest parts of your garden. Hope this clarifies things for you! If there is still confusion for some plants, Home Depot always has a copy of Sunset Western Garden Book on display. Check out the plant in the book to see which exposure ii likes best.
Good luck with your garden!
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