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Zonal Geranium

Botanical Name
Pelargonium x hortorum
Hardiness
Tender annual
Height
12 to 20 inches
Width
12 inches
Flowers
Summer till frost: reds, pinks, white, coral, bi-colored, salmon
Light
Full sun
Soil
Moist, well-drained
Planting & Care
  • Space plants 8 to 12 inches apart
  • Deadhead to encourage continual bloom
  • Mulch to keep roots cool
  • Geraniums can be wintered indoors. Take 3 to 4 cuttings and root in moist vermiculite or a well-drained potting mix. I find setting the pot in a plastic bag left open increases the humidity to encourage rooting without leading to rot. Once rooted, they can be moved to their permanent container, placed in a sunny location and grow as a houseplant.
  • You can also bring the whole plant indoors and raise it like a houseplant. Grow in a bright, sunny window or under artificial lights and keep the soil moist. Don't be alarmed if the plant drops most of its leaves. It will soon send out new leaves more suited for its indoor location.
  • A third, but less successful method for overwintering geranium, is dormant storage. Place plants in a cool dark location for winter. In spring place them in a warm, sunny location. Prune back to four inches, water and wait to fertilize until new growth appears.
Problems
Bacterial leaf spot, black leg, botrytis blight, stem rots, rust, oedema
Varieties
  • Freckles - pink with dark rose centers, compact, 1991 AAS winner
  • Black Magic Series - chocolate colored leaves
  • Bulls Eye - dark green with light green edged leaves, 14-16"
  • Ivy Geranium - P. odoratissiumum
  • Scented Geraniums - P. odoratissimum, P. graveolens, P. tomentosum
  • Regal or Martha Washington - P. domesticum

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