Giant Arrowhead flowers
(Photo courtesy of NetPS Plant Finder)
Height: 3 feet
Spread: 5 feet
Hardiness Zone: 5b
Other Names: Hooded Arrowhead, California Arrowhead
This native wetland plant features upright, arrowhead shaped green leaves; spreads by tuberous runners into a large colony; racemes of white flowers in late summer; an excellent pond or container plant
Giant Arrowhead features dainty racemes of white cup-shaped flowers with yellow eyes and a crimson blotch rising above the foliage from late summer to early fall. Its attractive textured pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.
Giant Arrowhead is an herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.
This plant will require occasional maintenance and upkeep, and should be cut back in late fall in preparation for winter. It has no significant negative characteristics.
Giant Arrowhead is recommended for the following landscape applications;
- Water Gardens
- Container Planting
- Bog Gardens
Planting & Growing
Giant Arrowhead will grow to be about 3 feet tall at maturity, with a spread of 5 feet. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 10 years.
This plant does best in full sun to partial 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 native to parts of North America. It can be propagated by division.
Giant Arrowhead is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. With its upright habit of growth, it is best suited for use as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. It is even sizeable enough that it can be grown alone in a suitable container. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.