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Giant Arrowhead

Sagittaria montevidensis

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Giant Arrowhead (Sagittaria montevidensis) at A Very Successful Garden Center

Giant Arrowhead flowers

Giant Arrowhead flowers

(Photo courtesy of NetPS Plant Finder)

Height:  3 feet

Spread:  5 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  5b

Other Names:  Hooded Arrowhead, California Arrowhead

Description:

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

Ornamental Features

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.

Landscape Attributes

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 ideally suited for growing in a pond, water garden or patio water container, and 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 water, 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. 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 full sun to partial shade. As an aquatic plant, it requires a suitable water garden environment and will benefit from special planting and ongoing care practices; consult one of our in-store experts for further details and instructions. 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 water 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 grown in outdoor pots and containers, aquatic plants like this one will require a special growing environment that meets their requirement for consistent moisture.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Container  Bog  Water 
Applications
Flowers  Foliage Color 
Ornamental Features