The Marsh marigold scientific name is Caltha palustris and is also known as caltha cowslip. Marsh marigold belongs to the buttercup family (Ranunculaceae). Actually the marsh marigold has no petals. Rather, each cluster of flowers is made of 5 to 9 sepals, which resemble petals, surrounding many stamens and pistils. The waxy deciduous foliage is rich green and each of the leaf is heart-shaped, kidney-shaped, or rounded with 2 lobes. You can sow the marsh marigold seeds in the late fall or early spring.


Marsh Marigold Plants Info

The botanical name:   The botanical name is Caltha palustris

The common names:  The common names are caltha cowslips, marsh marigold, cowslip, cowflock; in Great Britain the plant is known as mollyblobs, mayflower, pollyblobs, may blobs, water blobs, horse blob, water bubbles, gollins, and the publican. 

The plant type:   The plant is perennial, herb, wildflower.

The mature size: The mature size is 1–3 feet tall, 1–1.5 feet wide.

The sun exposure: The plant prefers partial, shade.

The soil type: The plant does well in loamy, moist soil.

The soil pH: Acidic (6.8)

The blooming time: The blooming time is spring.

The flower color: Yellow.

USDA Hardiness zones: USDA Three to seven.

The native area: The plant is native to North America.

Plant toxicity: The plant is toxic to humans and pets.



Marsh Marigold Plant Care

Marsh marigolds plant can easily be grown alongside other bodies of water such as streams, and the plants are often the first pond plants to bloom in early spring. These low-maintenance buttercup blossoms actually come up from April to June.

Furthermore, the marsh marigold plants are pretty hardy, and pests don't really bother them much. Most times the plant suffers from fungal diseases like powdery mildew and rust. These can be easily taken care of with fungicides or milk spray.


Light requirement: The plant will bloom consistently in part sun to full shade, an unusual feature as most flowering plants for water gardens prefer full sun. For best results they should be in a south-facing or west-facing direction. Find an especially shady afternoon spot in zones six to seven, protecting the plant from extremely high temperatures will actually welcome the plant to bloom into summer and maintain healthy foliage.

Soil requirement: Give the marsh marigolds plant a rich, moist, or boggy soil that is damp to fully submerge in water. If you’re planting them in a rain garden, position it near the center of the lowest spot.

Water requirement: General, plant in a slow-draining area. Adding a glorious yellow aesthetic to the edges of a pond or between the rocks near waterfalls, the marsh marigold plant is native to marshes, swamps, stream margins, and wet meadows in Newfoundland and Alaska south to Nebraska, Tennessee, and North Carolina. Still, the marsh marigolds plant can survive drought by going dormant and returning the following year.

Temperature and humidity requirement: You can plant the marsh marigold in any moist or boggy area like the woodlands, a rain garden, or near a body of water. Where summers are extremely hot, or in areas of direct sunlight, the marsh marigold plants can go dormant after blooming. Be expecting the foliage to wilt and die, and also look forward to the following spring’s show.

Fertilizer requirement: The marsh marigold plants don't really need much in the way of fertilizer, but if you actually insist, you can fertilize with an all-purpose fertilizer.


Marsh Marigold Propagation

One of the best ways to propagate marsh marigold is root division. Make sure you wear a glove to protect your skin from toxins from the plant. Divide in early spring when the foliage emerges and then replant immediately and water the roots well.


Growing Marsh Marigold Plant from Seed

Collect the marsh marigold seeds off the plant towards the end of its bloom period and then sow them when they ripen. Make sure you don’t allow them to dry out. Start store-bought marsh marigold seeds in spring. It may take roughly 3 years for the seed-started marsh marigolds to actually mature and start blooming. 

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