Giant Marsh Marigold (Caltha polypetala)

Giant Marsh Marigold (Caltha polypetala)

Giant Marsh Marigold is very similar to the regular marsh marigold, being one of the first plants to bloom in the spring, long before most marginals wake up. Bright yellow flowers with dark green glossy foliage welcomes water gardeners to a new pond season. This plant does well in full sun in cooler climates, or in partial to full shade in warmer climates. In cool climates it will grow spring through fall and possibly re-bloom during the season. In warmer areas it may wilt back when the summer is hot, but will begin growing again with the cooler weather in Autumn. It may be difficult to grow to grow giant or regular marsh marigolds in hot areas, whether in the humid Southeast or the dry Southwest U.S.--in these climates, they are likely to perform best in shade and the running water of a streambed.

All marsh marigolds may suffer in hot climates. especially in low humidity, but giant marsh marigolds are significantly more resistant to heat than regular marsh marigolds. In addition, giant marsh marigolds may grow significantly larger than regular marsh marigolds in shade or partial shade, and giant marsh marigolds are more likely to rebloom in Fall as the weather cools. We strongly recommend giant marsh marigold for warmer climates!

Some experts consider giant marsh marigold to be a subspecies of regular marsh marigold; either way, it is a great alternative!

Hardiness Zone: 3-9
Planting Container: We recommend a 2 gallon solid planting container or a medium planting bag. Also does really well in a 10" floating planting container.
Light Requirements: Full sun to part shade to shade; avoid full sun in hot, dry climates
Height: 6-12", up to 18-24" in partial shade - Spread: 18-24"
Water Depth: Moist Soil or water to 2" deep (Maximum water depth is for mature plants)

For planting instructions see our: Planting Instructions for Bog Plants Page.