Stachytarpheta urticifolia (Blue porter weed, Blue rat's tail, Nettleleaf velvetberry)

Stachytarpheta urticifolia Photo/Illustration: Bob Cook

(Based on 1 user review)

Rate this plant

Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11
Botanical Name: Stachytarpheta urticifolia stak-ih-TAR-fet-ah ur-tiss-ih-FOE-lee-ah Common Name: Blue porter weed, Blue rat's tail, Nettleleaf velvetberry
This pest-free perennial blooms best during warm months. It is strange how these small blue flowers attract butterflies more than large-blooming, showy neighbors. Blue porter weed gradually reseeds nearby for a fresh batch of new plants. Mix with other species of Stachytarpheta for a variety of leaf shapes and colors ranging from purple to coral.
Noteworthy characteristics: Attracts butterflies and bees; self-sows. Invasive in some areas, including Florida.
Care: Provide average garden soil in full sun to partial shade.
Propagation: By seed or from stem cuttings.
Problems: Infrequent.
Height 1 ft. to 3 ft.
Spread 1 ft. to 3 ft.
Light Full Sun to Part Shade
Moisture Medium Moisture
Maintenance Moderate
Characteristics Attracts Butterflies
Bloom Time Early Fall; Early Summer; Late Summer; Summer
Flower Color Blue Flower
Uses Beds and Borders, Suitable as Annual
Style Xeric Bed
Seasonal Interest Summer Interest
Type Perennials

Plants you might also like

Ruellia brittoniana 'Purple Showers' Ruellia brittoniana 'Purple Showers'
(Mexican petunia, Common ruellia, Wild petunia)
(6 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This three-foot-tall evergreen shrub bears many tubular, blue or purple, petunia-like flowers on dark stems over a long period. Each flower lasts for just one day. It is a fast grower that may self-seed aggressively. Use in a border, container, or at waterside. Can be grown as an annual in cooler areas.

Salvia chamaedryoides Salvia chamaedryoides
(Germander sage, Mexican blue sage)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This choice species boasts narrow, downy sage-green leaves and true sky-blue blossoms from summer to fall. It has woody stems and forms a beautiful specimen 12 inches tall by 18 inches wide.

Trachelium caeruleum Trachelium caeruleum
(Blue throatwort)
Be the first to rate this plant
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This species bears dome-shaped flower heads several inches across that are crowded with tiny, tubular amethyst or white flowers that look somewhat like the blooms of an allium. It has lance-shaped, toothed leaves in hues of cordovan purple or deep green brushed with plum highlights. It blooms over a long season. Though it is a perennial, blue throatwort performs wonderfully as an annual and blooms summer to fall. Plants grow to about 3 feet tall and wide.

Sedum ‘Autumn Joy’ Sedum ‘Autumn Joy’
(Stonecrop)
(12 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant is as dependable and adaptable as they come. Its flowers bloom from August into November; they open pink and mature to a copper befitting of autumn. It is 2 feet tall and wide, with succulent stems and leaves. 'Autumn Joy' looks great with ornamental grasses.  

Salvia 'Indigo Spires' Salvia 'Indigo Spires'
('Indigo Spires' sage)
Be the first to rate this plant
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'Indigo Spires' sage is a vigorous hybrid prized for its 12- to 15-inch-long, twisting spikes of dark violet flowers. It is a non-stop bloomer from early summer through fall. Blooming can be further encouraged by pinching stem tips early in the growing season and deadheading the spikes once they fade. 'Indigo Spires' quickly grows to 4 feet high, and can be grown as an annual where not hardy.