Answer: Ideally the soil pH would be slightly lower (4.4) and the humus content would be very high, near 8%, but it sounds like you have done what you need to in order to accommodate the plants. This leads me to question a few other basic points which could be easily overlooked. If you are using a watering system, is it functioning properly so that those plants are receiving adequate water? Is it possible the neighboring plants have usurped the root run area for the new plants and are simply outcompeting them? Finally, did you determine what caused the original plants to die? It is possible that a disease or fungal infection is present and reinfecting the new plants. You might find the following discussion of blueberry diseases interesting. http://www.canr.uconn.edu/ces/ipm/fruit/htms/bluestem.htm#an... and
If you try again and still have problems, you might wish to contact your local county extension (678-7807) for a more specific identification of the cause of the problem. Once you have identified the cause you can begin to consider how to treat it and they should also have the most up to date recommendations on that.
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