Petunia integrifolia is a resilient heirloom petunia that brings summer color from June through November, reaching a modest 12-18 inches tall with a 10-inch spread. This variety thrives in full sun across hardiness zones 8 and warmer, blooming reliably about 91 days from seed to first flowers. Deer leave it alone, and once established, it tolerates drought well, making it a low-maintenance choice for gardeners seeking season-long floral abundance.
1
Full Sun
Moderate
8-8
18in H x 10in W
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High
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Petunia integrifolia offers an unusually long bloom window stretching nearly six months, from early summer through late fall, delivering consistent color when many annuals fade. The plant's natural drought tolerance and deer resistance eliminate two common garden frustrations, while its moderate water needs mean less fussing once it's in the ground. Seeds germinate quickly within 7-14 days when surface-sown with light, and the plant attracts pollinators throughout its extended season.
Petunia integrifolia is grown as an ornamental annual or tender perennial in cooler zones, valued for continuous garden color from early summer through late autumn. The flowers attract butterflies and other pollinators, making it a natural choice for gardens designed to support beneficial insects. Its compact, spreading habit suits containers, garden beds, and mixed borders where season-long blooms are desired.
No timeline data available yet for this variety.
Start seeds indoors 8-10 weeks before your last spring frost. Surface-sow the tiny seeds and press them in lightly; they require light to germinate. Cover the seed tray with a humidity dome or mist lightly with vermiculite to retain moisture. Maintain soil temperature between 65-75°F. Seeds typically sprout within 7-14 days.
Transplant seedlings into the garden after hardening them off gradually to outdoor conditions. Space plants 1 inch apart, though they'll need thinning as they mature. Plant outdoors after the danger of frost has passed and soil has warmed.
Direct sow is mentioned as an option in source material but not fully detailed for this variety.
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