Geranium ' Sprinter' (Pelargonium) is one of the most popular summer plants. They flower for a long time until the frost sets in. If you let them overwinter in a frost-free place, these geraniums will flower again the following year. stunning red/white flowers, very conspicuous. Fabulous in combination with Apollo. Geraniums are easy to grow from seed. About 10 to 12 weeks after sowing the first plants will flower.