I have a 15" - 20" deep planting bed on top of a long rock wall along the side of a bocce court that needs a refresh. It is "broken up" into 3 sunny sections based on the shade of 2 Meyer lemon trees below the rock wall. My thought is to plant 3 lavender plants (meaning actual lavender, not just lavender in color) in each of the left and right sections for a total of 6 matching lavender plants. I am in the East Bay of the SF Bay Area, Zone 9b. I think I should get lavenders that don't get any larger than 2 feet wide and tall to not obscure the view from the bocce court AND to not grow over into the bocce court. Please see photo for hint of what I am talking about. Please HELP me...which varietal of lavender should I try to get for the left and ride side in this 15"-20" deep planting bed? Thank you :)