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Alternanthera, Purple Knight

Short Description

Bold masses of dark metallic leaves.

Full Description

Vigorous, fast growing plants up to 3' across. Use as mid-border hedges, accent plants or instant spots of deep rich color. Annual. Ht. 3'.
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Item # Product
Item#: 33829A
Order: 1 Pkt. (12 Seeds)
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Product properties

Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun, Part Sun

Height The typical height of this product at maturity.

18-36 inches

Spread The width of the plant at maturity.

24-36 inches

Ornamental Use Ways in which the product may be used in the garden for ornamental effect.

Beds, Borders, Cut Flowers

Life Cycle This refers to whether a plant is an annual, biennial or perennial. Annuals complete their life cycles in one year; biennials produce foliage the first year and bloom and go to seed the second year; perennials can live for more than two years.


Sow Method This refers to whether the seed should be sown early indoors and the seedlings transplanted outside later, or if the seed should be sown directly in the garden at the recommended planting time.

Indoor Sow

the burpee




since 1876


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Full Sun, Part Sun
18-36 inches
24-36 inches
Ornamental Use
Beds, Borders, Cut Flowers
Life Cycle
Sow Method
Indoor Sow
Bloom Duration
8 weeks
Flower color
Alternanthera, Purple Knight is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Great Hot-Summer Filler This is a beautiful, vigorous plant that fills in areas of the summer garden and provides a lovely, dark reddish-purple contrast. Thrives in the heat and humidity of our Delmarva Peninsula summers.
Date published: 2017-10-13
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