Description

Giant Groundsel features bold spikes of yellow flowers rising above the foliage from early to mid summer. Its large serrated round leaves remain forest green in colour throughout the season.

Landscape Attributes

Giant Groundsel is an herbaceous perennial with a rigidly upright and towering form. Its wonderfully bold, coarse texture can be very effective in a balanced garden composition.

Giant Groundsel is recommended for the following landscape applications;

Planting & Growing

Giant Groundsel will grow to be about 3 feet tall at maturity extending to 6 feet tall with the flowers, with a spread of 3 feet. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 20 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in partial shade to shade. It prefers to grow in moist to wet soil, and will even tolerate some standing water. It is not particular as to soil pH, but grows best in rich soils. It is somewhat tolerant of urban pollution. This species is not originally from North America. It can be propagated by division.