Hardiness: 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) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Sun to Partial Shade
Danger: Handling plant may cause skin irritation or allergic reaction
Bloom Color: Purple
Bloom Time: Late Summer/Early Fall
Foliage: Grown for foliage Aromatic Smooth-Textured
Other details: Very high moisture needs; suitable for bogs and water gardens May be a noxious weed or invasive This plant is attractive to bees, butterflies and/or birds
Propagation Methods: By dividing the rootball By dividing rhizomes, tubers, corms or bulbs (including offsets) From herbaceous stem cuttings By simple layering By tip layering By serpentine layering By stooling or mound layering
Seed Collecting: N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On Jan 10, 2012, YngDons_Koi_pon from Mountain View Acres, CA wrote:
Im In Victorville Ca, & I Uprooted A Few Mint Plants From My Flower Bed & Transfered Them To my 4,000gal Koi Pond. I Put Some On Top Of The Water & Put A fine Net Around The Roots To Protect Them From The Fish & I Submerged Some Just To Test The Possibilities of New Pond Plants & They Did Better Than The Regular Pond Plants Still Green In The Cold Winter!
On Apr 5, 2010, akilgore42 from Spokane, WA wrote:
Found this growing wild in an untended part of my garden that receives a lot of water. It spreads easily due to sending out runners, therefore should be contained if you do not want it to spread. I transplanted some to a patio pot in the fall, and hope to keep it contained there. It has pretty purple flowers and the purplish leaves and stems have a lovely mint scent. I have dried some to make mint tea and hope to find more uses for it. I tried to grow some indoors, but I think it was too dry an environment. It loves growing outside next to a sprinkler in a spot that receives part sun/part shade.
On Mar 18, 2008, peachespickett from Huntington, AR wrote:
Planted this around our creek on our property here in Western Arkansas. Has spread slowly, only 5-6 feet in three years, probably due to constantly changing erosion and water levels, but looks great every summer. I've also grown it in a hanging basket, it just kept branching and branching.
A strongly scented perennial mint from Europe and Asia.
Has ovate to ovate-lanceolate, mid green (sometimes purplish), opposite, toothed, veined leaves which can be hairy or hairless. The stems are often purple. Bears tiny, densely crowded, purple, tubular flowers borne in whorls. The whole plant is heavily mint (sometimes almost sickly sweet) scented.
Likes boggy places or shallow ponds in poor soil with full sun to partial shade.
Can be invasive, best grown in a pot planted 6 inches below the water of a pond or just in a pot in a bog garden.
This plant has been said to grow in the following regions:
Phoenix, Arizona Huntington, Arkansas Mountain View Acres, California Thackerville, Oklahoma Briarcliff, Texas Lake Goodwin, Washington Spokane, Washington