How to Grow Caltha

Caltha are herbaceous perennials that are also commonly known as the Marsh Marigold. They consist of stunning heart-shaped or rounded lush green leaves whilst embellished by an abundance of yellow cup formed flowers between March and May, sometimes lasting long into the summer. They are best suited to flower beds and borders within low maintenance or wildlife gardens. You should expect to see Caltha grow to an approximate height of 25cm (10”) and a spread of 45cm (18”).

Caltha are best planted in moist, wet and waterlogged loam based soil and so thrive in areas near ponds, lakes and damp woodland. When you are growing Caltha, ensure that the soil does not dry out, as they tend to succeed in full sun or part shade. During conditions of drought they will lie dormant and lose their leaves, but should recover for a following flowering season if kept watered.

Caltha are low maintenance plants and the care level is incredibly easy if planted in moist areas. Ensure that you check the levels of moisture in the soil surrounding your Caltha and water thoroughly during dry conditions. Once the flowering period is over, cut back leaf growth and allow fresh foliage to push through.

It is possible to propagate Caltha by seed towards the end of the flowering period. When ripe, these can be collected and planted in seed trays. Alternatively, you can propagate via division in late summer or early spring.