Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) 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 Sun to Partial Shade Light Shade
On Nov 1, 2008, Oberon46 from (Mary) Anchorage, AK (Zone 5b) wrote:
I planted two of these in my pond in mesh baskets and sunk them to three inches over the soil line. They did fine all summer and for winter I sunk them into the water, one totally and one part way. I am not sure how they will do with our -20 weather. The ice is already (Nov 1) 5-8" thick. It will be March or April before I can see them or my fish again.
Helpful tip for those without wet growing conditions---
I've found a microclimate that provides great growing conditions needed by Corkscrew Rush: about 18" away from my air conditioning / heating unit! A pvc pipe directs the water from the ac unit to the plant keeping it moist and healthy all season without any additional watering.
An added bonus:
in the winter, the Rush continues to thrive (even spread) warmed by the heat given off from the gas exhaust of the unit!
On Feb 24, 2006, EAPierce from Idaho Falls, ID (Zone 5a) wrote:
A good local garden center here in SE Idaho carries this and classifies it as both a perennial grass and an aquatic, which is accurate. While it thrives best in wet, marshy conditions and standing water, it also lives and grows perennially in cold climates with alkaline, heavy soil, and tolerates drought. I planted a gallon-sized specimen last year in a semi-shady location, and it did just fine and even spread at a nice, easy pace. I also noticed that it stayed green underneath the snowdrifts this winter. I'm sure it's a great aquatic plant, but those with rock gardens might want to consider it as a nice accent. It's a truly unique grass- verra verra pretty stuff.
On Jun 10, 2003, Zanymuse from Scotia, CA (Zone 9b) wrote:
This plant adds visual interest to the pond with its contrasting texture and unique form.
This plant has been said to grow in the following regions:
Fortuna, California San Francisco, California Fountain, Florida Marietta, Georgia Idaho Falls, Idaho Byhalia, Mississippi Utica, New York Youngstown, Ohio Laflin, Pennsylvania Eagleton Village, Tennessee Lexington, Virginia Concrete, Washington Edmonds, Washington La Conner, Washington