Well if it's facing east it will get the sun in the morning. What you need to take into account are the buildings, trees around the garden. During the summer the sun raises high in the sky so will more than likely higher surrounding buildings, It winter it's very low... You can probably find out the times and degrees of sunset and sunrise but it probably won't mean that much. Draw a plan of the garden with major obstructions and then you'll be able to see what casts a shadow, when. HTH's On the other hand you could just ask the vendor??