Roses losing all their leaves

Hi. I just planted 5 rose bushes about 3 weeks ago. I watered them well as suggested with a transplanter liquid as directed. I watered them again after 4 days. I soon noticed all the leaves were disappearing from the roses I planted except one. I watered them again 5 days later and added some rose granular fertilizer. The stems are green but almost all leaves are gone with no sign of new growth. (no sign of bugs) My question is, did I over or under water these roses and have I made thing worse by adding a granular fertilizer in week 3. What causes total leaf loss. Over or under watering.??? One rose bush is doing fine and actually has a rose bud on it ready to flower. I have treated them all the same and they are in varying sunshine from 4 to 6 hours a day in different areas of the yard. Any help would be appreciated. Please reply here or to the email below.
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