Geranium is a big genus with about 422 species, including annual, biennial, and perennial flowering plants. A few species are even reliably drought tolerant in normal summer conditions. If keeping geraniums as houseplants, be sure to bring them indoors in late summer or early fall, when nighttime temperatures start to regularly dip below 55°F (13°C). Incredibly tough, pest and disease resistant, they give a lot and require very little. Rozanne is a plant that everybody can grow. But if you wait too long, you risk missing the cool night temperatures that encourage budding. Most hardy geraniums are ridiculously easy to grow. What are the best qualities of the hardy geranium? Growing hardy geraniums is a dangerous passion. All they require is a moderately fertile, well-drained soil. Included is a guide to choosing the right variety and zones for hardiness, how and where to plant, and how to deal with diseases and pests. unsung heros hardy geraniums are a group of perennials that are still awaiting the credit they are due. Geraniums may be grown as houseplants or as annual flowers. All they require is a moderately fertile, well-drained soil. The plants are also known with the following common names: Hardy geraniums The plant does not have stems but rather thick rhizomes (runners) just below the soil surface. The pelargoniums growing in a container on your patio are annuals, while tuberous geranium plants are perennials. Most of the Hardy Geraniums are … Her strong constitution and ability to adapt to a wide variety of conditions means there’s very little that can “go wrong”. You really don’t need green fingers to enjoy great looking results when growing Geranium Rozanne. They are so versatile – there are varieties that will grow in the most inhospitable places. Hardy geraniums forming low mounds of well-formed foliage and dainty flowers make superb flowering ground covers. Cranesbill Geranium is the name generally used to refer to the perennial geranium species. Learn all the information you will need to grow beautiful, hardy perennial geraniums. The flowering plants are also seen growing on the mountains of the tropics. About Tuberous Geranium Plants. A more sprawling plant, and one of the finest geraniums for the perennial border, is its hybrid offspring 'Ann Folkard' (zones 5 to 9), whose purplish magenta flowers with their dark eyes form a fine contrast with chartreuse leaves. There is a hardy geranium to suit most garden situations. A few species are even reliably drought tolerant in normal summer conditions. How to grow hardy geraniums Cultivation. Knowing how to grow geraniums outdoors begins with planting at the proper time. 'Ann Folkard' also blooms over a long period -- from spring to fall. carefree bloomers that add bright dots of color for most of the growing season, these plants weather a wide range of temperatures, flourish in a variety of light conditions and are happy in most soils. G. phaeum and G. nodosum are both perfectly happy in dry shade, while G. macrorrhizum and G. x cantabrigiense spread across the soil forming a thick ground cover so that there is no need for weeding. As a general rule, they tend to do best in early morning and afternoon sun, although some, such as Geranium sanguineum and Geranium pratense and their varieties thrive in full sun, providing there is adequate moisture in the soil. The familiar scented geraniums are actually not true geraniums; they are pelargoniums. The root structure is thick and wiry and helps store moisture and food supply to help the plant ‘winter over’ in cold or even snowy conditions. 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