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Geranium (Zonal) is one of the most reliably cheerful bedding plants available, producing bold clusters of red, pink, salmon, or white flowers from spring through frost above scalloped, often zone-marked leaves. Perennial in zones 9–11 but grown as heat-loving annuals everywhere, zonal geraniums thrive in full sun with excellent drainage and moderate watering. They're among the best container plants available — perfectly proportioned for window boxes, patio pots, and hanging baskets. Unlike many annuals that fade in summer heat, zonal geraniums hit their stride in warm weather and continue performing until hard frost. They overwinter easily as cuttings on a bright windowsill, giving you a head start the following spring at no cost.
Plant zonal geraniums in full sun to partial shade in well-drained, moderately fertile soil or quality potting mix for containers. Space 12–18 inches apart. Water moderately and allow soil to dry slightly between waterings — geraniums are prone to root rot in consistently wet soil. Remove spent flower clusters at the base of each stem to encourage continuous blooming. Fertilize every 3–4 weeks with a high-potassium fertilizer (such as tomato feed) to promote flowers over foliage. To overwinter, take 3–4 inch stem cuttings in late summer, root in moist perlite or potting mix on a sunny windowsill, and keep nearly dry over winter. In spring, cut back leggy overwintered plants and resume regular watering to re-establish.
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