Martha Washington geraniums have showy, large flowers and are used as pot plants. Scented geraniums ( Pelargonium species) have small or large leaves that may smell like roses or lemons and are grown as herbs. Related species: Pelargonium x peltatum, the ivy-leaved geranium, has pendulous branches loaded with flowers and excels in window boxes and hanging baskets. Zonal geraniums are also grown as standards-a single stem is trained to the desired height with a bushy globe of flowers and leaves above it. They will bloom through the winter in sunny windows. They're classics in containers, by themselves or mixed with other plants. Group three or more together for color impact in flower borders or along walks and pathways. Uses: Zonal geraniums provide pockets of color in any sunny spot. Seeds germinate in seven to ten days at 70 degrees to 75 degrees Fahrenheit. Seed-grown varieties should be started 10 to 12 weeks prior to garden planting. Make cuttings eight to ten weeks prior to planting out for husky plants. Plant after all danger of frost has passed and the soil is warm. Incorporate a slow-release fertilizer into the soil at planting time. How to grow: Zonal geraniums benefit from full sun and moderate to rich, well-drained, moist soil. Plants from four-inch pots transplanted to the garden in spring will reach up to 18 inches tall and wide by the end of summer. Flower clusters (umbels) contain many individual flowers and give a burst of color. Description: Zonal geraniums are upright bushes covered with red, pink, salmon, white, rose, cherry-red, or bicolored flowers on long stems held above the plant.
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