Rainmaster Petunia is a robust heirloom cultivar bred to handle both sun and sudden downpours, earning its name through reliable performance in unpredictable weather. These compact plants reach 18-24 inches tall and produce abundant blooms from early summer through fall, transforming gardens with continuous color from June through November. Starting from seed indoors 8-10 weeks before your last frost, you'll have flowering plants ready in about 84 days. This variety thrives in full sun with moderate water, resists deer grazing, and tolerates dry spells, making it a dependable choice for mixed borders, containers, or cottage gardens.
10
Full Sun
Moderate
10-11
24in H x 10in W
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High
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Rainmaster petunias flower prolifically across the entire warm season, handling both heavy rain and dry stretches without complaint. The compact 18-24 inch habit stays tidy without constant deadheading, while the deer resistance and pollinator appeal make these plants work harder in your garden. Direct sowing is possible in warmer zones after spring frost, though indoor starting gives you earlier blooms and more control over placement.
Rainmaster Petunia serves primarily as a landscape flowering plant, valued for continuous summer and fall color in garden beds, mixed borders, and containers. The deer-resistant nature makes it particularly useful in areas where wildlife pressure is a concern, while the compact growth habit suits both small spaces and larger drifts of color.
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Start seeds indoors 8-10 weeks before your last spring frost. Surface sow the tiny seeds and press them in lightly, as they require light to germinate. Cover with a humidity dome or light sprinkling of vermiculite to retain moisture. Keep the soil at 65-75°F and expect germination in 7-14 days. Transplant seedlings outdoors after hardening off once all frost danger has passed.
Transplant seedlings outdoors after your last spring frost once they have been hardened off by gradually exposing them to outdoor conditions over 7-10 days. Space plants 10 inches apart in full sun locations with well-draining soil.
In zones 8 and warmer, direct sow after the last spring frost into a finely raked seedbed. Surface sow and press seeds in lightly. Keep the seedbed consistently moist until germination occurs in 7-14 days, then thin or transplant seedlings to 10-inch spacing.
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