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Begonia (Semperflorens / Wax Begonia) is the most reliable and versatile annual bedding plant available, producing a non-stop carpet of small, cheerful blooms in shades of red, pink, and white from late spring until hard frost. Thriving in zones 9–11 as perennials but grown as annuals everywhere, wax begonias are uniquely tolerant of both full sun and deep shade — making them the first choice when you're unsure of a site's light conditions. The waxy, glossy foliage (green or bronze) resists disease and drought better than most annuals. A single flat of begonias planted in May will still be blooming vigorously in October with almost no maintenance.
Start wax begonias from seed indoors 12–14 weeks before last frost (seeds are tiny — surface sow and don't cover), or buy transplants. Plant outdoors after last frost in moist, well-drained soil with organic matter. Space 8–10 inches apart. Water at the base; begonias are susceptible to botrytis in humid conditions with wet foliage. Fertilize every 4 weeks with a balanced fertilizer. Deadheading is optional — modern varieties are largely self-cleaning. In fall, take 3-inch stem cuttings before frost to overwinter on a windowsill. Begonias are not drought-tolerant; in containers, check moisture daily in summer heat. Bronze-leaved varieties tolerate more sun than green-leaved types.
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Begonia (Semperflorens / Wax) grows across 11 USDA hardiness zones. Explore the catalog for any of them: