Mexican Petunia (Purple Showers) Plant Profile Botanical Name Ruellia brittoniana Bloom Time May to November Flower Color Purple, Pink, White Hardiness Zone 8–11 Native Area Mexico Click to see full answer. In respect to this, do Mexican petunias spread?Mexican petunia spreads naturally by both seeds — it can spew the small brown discs as far as ten feet — and rhizomes. Photo by Gretchen Heber. You can also propagate this plant via purchased seeds, cuttings, or division.Additionally, do Mexican petunias die in winter? A: Mexican petunia, Ruellia simplex, should grow perfectly well outdoors in the Atlanta area. It might not, however, be winter-hardy in north Georgia. The blue flowers are attractive in late summer through fall. The stems will die back to the ground after the first frost. Regarding this, what does a Mexican petunia look like? Cold-hardy in UDSA Zone 7 and southward, Mexican petunia grows 3 to 4 feet tall with attractive, purplish stems and narrow, lance-shaped leaves. Showy blue or purple flowers, beloved by butterflies and hummingbirds, appear from early summer through the fall.Do hummingbirds like Mexican petunias?It is a ‘Ruellia brittoncana’ or Mexican petunia. They resemble the petunia flower we are familiar with, but the two plants are NOT related. Butterflies and hummingbirds are attracted to the colorful blooms, which makes the plants popular with backyard gardeners.
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