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Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) 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) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Full Sun
Danger: All parts of plant are poisonous if ingested
Bloom Color: Bright Yellow
Bloom Time: Mid Spring Late Spring/Early Summer
Foliage: Deciduous Shiny/Glossy-Textured
Other details: Requires consistently moist soil; do not let dry out between waterings Very high moisture needs; suitable for bogs and water gardens
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Propagation Methods: By dividing the rootball From seed; direct sow outdoors in fall
Seed Collecting: Allow pods to dry on plant; break open to collect seeds
On Mar 8, 2008, posyblossom from Athens, PA (Zone 5b) wrote:
Sends out runners and pops up in unexpected places. It can be a bit invasive but is easy to transplant or remove from areas where not wanted. It is a nice alternative to Daffodils for Spring and is able to re bloom numerous times but the blooms get smaller.
On Mar 7, 2006, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
A bright yellow native that can be seen in some small wilderness patches that is wooded and near water in early to mid spring. For me, they tend to last all year round with foliage while the flowers are among the earliest to bloom. They seem to dislike small non draining tubs that is crowded with other speces. I have at least one large speciment in a wooden half wine barrel dug in the ground along with a patch of yellow flag iris (warning- flag iris multiply so need to be divided every three or four years) , a golden alexander, and sensitive fern. The barrel flood for short periods of time, so Marsh Marigold do well in non draining container set in the ground. They will grow in sun or shade, with shade pereferable in hot climates.
On Apr 15, 2005, Happenstance from (Zone 10a) wrote:
An excellent, well behaved pond plant with clear very bright yellow flowers from March - October in Zone 10a. Large beautiful foliage, evergreen through the winter rainy season.
On Jul 17, 2004, vanislegirl from Courtenay
() wrote:
This plant is thriving here in my pond on Vancouver Island, West Coast of Canada (above Washington State). Beautiful, long lasting blooming time (weeks). Last winter it got down to -10 Celcius (14F) for about 5 days, the pond was frozen over and under a foot of snow - the marigold came back beautifully! I see we can't add a Canadian postal code but just wanted to let you know this plant does very well way up here!
On Sep 2, 2001, eltel from Macclesfield, CHESHIRE (Zone 8a) wrote:
Also known as Kingcup, Meadow bright, and May blob. An early spring, bright yellow, “buttercup” type flower for the bog garden or pool edge to depth of 6 inches. In my pool (which frequently freezes over in Winter) they produce a mass of flower from April/May onwards.
On Nov 2, 2000, jody from MD &, VA (Zone 7b) wrote:
There are about 10 species to this genus. They are all moisture loving plants. Grown best along ponds but are happy in any rich, moist/damp soil in full sun. They grow to about 18" and have the about the same spread. Flowers in early spring to mid summer, flower color is yellow or white. They spread by rhizomes but can also be proagated from seed. Hardy zones 3-8.
Regional...
This plant has been said to grow in the following regions:
Clayton, California Hanna City, Illinois Plainfield, Illinois Annapolis, Maryland Bellaire, Michigan (2 reports) Erie, Michigan Saint Helen, Michigan Isle, Minnesota Minneapolis, Minnesota Byhalia, Mississippi Coshocton, Ohio Salem, Oregon Athens, Pennsylvania Coopersburg, Pennsylvania Schwenksville, Pennsylvania Wilkes Barre, Pennsylvania
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