Hardiness: USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F)
Sun Exposure: Full Sun
Bloom Color: Pale Pink Medium Blue Dark Blue White/Near White
Bloom Time: Blooms repeatedly
Foliage: Evergreen Aromatic
Other details: This plant is attractive to bees, butterflies and/or birds Flowers are fragrant Drought-tolerant; suitable for xeriscaping
Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline)
Patent Information: Non-patented
Propagation Methods: From softwood cuttings From semi-hardwood cuttings From hardwood heel cuttings By simple layering By stooling or mound layering
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On Jun 21, 2011, cloverlymd from Silver Spring, MD wrote:
'Arp' has good scent and flavor, and is reliably hardy in the Washington-Balto. suburbs. In my experience it needs to be replaced after 5-7 years as it begins to suffer significant winter damage when it gets big/old enough.
On Apr 10, 2011, plants4u from Puyallup, WA wrote:
In October of 2010 I planted a #1 size pot of 'Arp' rosemary in a large planter along with some ornamental cabbage. The end of November brought us a severe cold snap that plunged our area into low single digit temps. for 2 to 3 nights. Amazingly this cultivar was unscathed by this freeze that has caused much damage to plants around our area. Plus one for 'Arp'.
About 10 years ago bought a rosemary plant off the sale table just for the summer. It survived much longer than I expected then 2 harsh winters finally killed it. Replaced it with the 'Arp' strain which (according to the vendor) is more winter-hardy. So far it's doing very well. Pretty flowers and to me tastes the same.
On Oct 21, 2008, Spookycharles from Langley, WA (Zone 8b) wrote:
This hardy rosemary is by far the most reliable variety for western Washington winters. I have multiple 'Arp' plants and have never had notable winter damage on any of them even through nasty excessively wet and cold winters.
These are strong shrubs that do get large with time, take well to pruning and are incredible as a culinary rosemary. I have found that some 'Arp's are inclined to grow at more of an angle than some other rosemary plants and, if left to their own devices, with age frequently take on more of a sweeping form than a ridge, upright one.
On Jun 9, 2007, aasalas from Lewes, DE (Zone 7b) wrote:
We love this plant, which grows beautiful in the sandy soil here in Lewes, DE. Ours is used as an informal hedge in front of our porch--running along the sidewalk--and almost everyone who walks by rubs the foliage, releasing the wonderful scent. This past year the plants bloomed exhuberantly, first from early November thru much of January, then again from late February through March (with some blooming even into April). Many neighbors in town commented on it! The soil where we planted them is almost pure, unamended sand, which was what was left after our house was built. Except for the first summer, we don't water them at all. The picture I've posted is a couple of years old; they are now at least two or three times that size (i'll try to remember to post a new shot soon). I show a view from a distance, because I don't think many people realize what a wonderful landscape plant this can be in the right place. Ours forms a wonderfully irregular, "beachy" hedge.
On Jun 27, 2005, PurplePansies from Deal, NJ (Zone 7a) wrote:
Many rosemarys do not winter well for me. I put arp in a very sheltered , well draining site with a cloche and it overwintered just fine. This winter also had a few severe (in the 10s and teens is severe to us) cold snaps. I recommend it for people who have trouble overwintering rosemary. It is a little slow to recover after winter damage but does just fine. :)
On Jun 5, 2005, Gindee77 from Hampton, IL (Zone 5a) wrote:
This is an annual here in zone 5 but it's worth getting each year for the uses it has in the kitchen. It can also be brought in to over-winter in the house, in a sunny window. It makes a great seasoning for Italian foods and is greatly aromatic in homemade potpourri.
This plant has been said to grow in the following regions:
Phoenix, Arizona Huntington, Arkansas Rogers, Arkansas , British Columbia Knights Landing, California Palm Springs, California Highland Acres, Delaware Atlantis, Florida Pembroke Pines, Florida Emmett, Idaho Hampton, Illinois Mount Vernon, Kentucky Cloverly, Maryland Forest Glen, Maryland Grosse Pointe Farms, Michigan Ramblewood, New Jersey Society Hill, New Jersey Albuquerque, New Mexico Rochester, New York Efland, North Carolina Lima, Pennsylvania Seven Oaks, South Carolina Germantown, Tennessee Austin, Texas Cloverleaf, Texas Copperas Cove, Texas Houston, Texas Rowlett, Texas Lindon, Utah Langley, Washington Puyallup, Washington Great Cacapon, West Virginia