Answer: Your optimum fertilization amounts would be determined on the basis of soil tests. There is really no other way to make a precise recommendation. Your county extension can help you with the soil tests and interpreting the results.
For a rule of thumb, you would use a granular fertilizer for acid loving plants according to the label instructions for all but the euonymous and barberry. These last two would be fine with a general purpose complete fertilizer such as a granular 10-10 10 again according to the label instructions. Additionally you could provide them all with a top dressing of compost in late fall after frost and again in the spring.
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