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Browse Plants

Narrowed By:Zone: 11+ Flower Color: Blue+ Seasonal Interest: Fall
Displaying 1 - 6 of 6 listings   Sort By: Sort
Ageratum houstonianum Ageratum houstonianum
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

There are many cultivars available of this fast-growing annual. They are best used as bedding, edging, or container plants. Panicles of blue, pink, purple, or white flowerheads arise from oval, downy leaves in midsummer and continue until frost. They have a soft, fuzzy appearance and attract butterflies.

Browallia americana Browallia americana
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant produces distinct, 2-inch blossoms primarily in rich blue (but also in shades of purple and white), with dark eyes smudged white. It is suitable for sun and partial shade.

Plumbago auriculata Plumbago auriculata
(Cape leadwort, Cape plumbago)
Be the first to rate this plant
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This evergreen shrub, native to South Africa, has long, skinny stems and phlox-like pale blue flowers. It can be used as a shrub, climber, pot plant, or groundcover.

Ruellia brittoniana 'Purple Showers' Ruellia brittoniana 'Purple Showers'
(Mexican petunia, Common ruellia, Wild petunia)
(7 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)
(2 user reviews)
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)
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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.


Displaying 1 - 6 of 6 listings   Sort By: Sort