Answer: Decisions, decisions! Salem Rosemary is a good upright variety of rosemary, with narrow dark green leaves and pale blue flowers. It is one of the most reliable growers in our climate, and can even be grown as a hedge. When planted in the ground, Salem can reach up to 5 feet in height, and get to be about 4 feet across, so make sure to give it plenty of room. Pinch the tips back periodically to keep the growth fresh and the bottom of the plant from becoming too woody.
Tuscan Blue is an upright rosemary that has strong vertical growth, thick, fleshy, dark green leaves, and beautiful blue-violet flowers. Tuscan Blue makes an excellent container plant, or can provide a strong vertical accent in your perennial border?just make sure it has good drainage, and plenty of air circulation.
Spice Islands stands very erect and grows to about four feet and is covered with dark blue flowers in late winter and early spring.
Arp rosemary grows to about 5' and is a Texas native so you know it will grow well in your garden.
I think I would choose Arp for the pillars and Tuscan Blue for under the window.
Whichever you choose, you're sure to enjoy the aroma these plants provide. Best wishes with your garden!
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