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Growing Geraniums (Annual)

Growing Geraniums (Annual)

Pinto Mix Hybrid



Zonal Geraniums (Pelargonium x hortorum) are popular flowering annual plants. They are commonly grown as container plants and in the landscape. They were developed as hybrids of several Pelargonium species.

How To Grow

Zonal geraniums can be sown indoors 10 to 12 weeks before the last expected frost in spring. Plant the seed 1/8 to 1/4 inch deep and maintain trays at 70 to 75 degrees. Expect germination in 7 to 21 days.

After the last frost in spring, harden seedlings off and plant in full sun in fertile, moist, well-drained soils. In hot summer climates, plants appreciate some shade in the afternoon.


Remove faded flowers regularly to ensure strong repeat blooming.

Fertilizer Recommendations

Zonal geraniums are moderate to heavy feeders and benefit from regular fertilization. Use full rates of  ALGOplus Flowering Plant 4-6-7 liquid fertilizer or Neptune Fish & Seaweed Fertilizer 2-3-1.

Common Problems

Geraniums are usually not seriously troubled by pest and disease problems when they are properly sited and culture is good. Aphids and whiteflies sometimes attack plants. Leaf spot and grey mold (botrytis) are occasional problems. Use 70% neem oil or insecticidal soap to control insect pests. Root and crown rot can be a problem if plants are grown in soils that are heavy and consistently wet.

Serenade biological fungicide can be used as a preventative to reduce the potential for disease infection.

Alternative Products

Other summer annuals include marigold and petunia.

Product Recommendations

Zonal geraniums combine well in the landscape with annual foliage plants like dusty miller or Fireworks fountain grass.

Geranium Facts

The genus name, Pelargonium, derives from the Greek word "stork" (pelargos) and is a reference to the beak-shaped fruit produced by the plants.

Growing Tips