Just bought some H.arborescens 'Compact Marino' today.. I needed to fill in a large planter with a fragrant purple ... similar to ageratum in color and size... when the nursery called to say they couldn't fill the rest of my order. I was hoping for evergreen and never even thought to ask about that before I purchased them. Annuals? Hope to keep them going for a while. Anyone know if they survive well enough year to year? This is zone 8...near Austin, TX.

Thanks, FFR