Geraniums are just about the easiest of all plants to grow as long as you give them a sunny location in well-drained soil. Officially, they should be called pelargoniums, to distinguish them from the true geraniums, which are hardy outdoor perennials. They were classified as pelargoniums 2000 years ago, but it is taking us a while to get used to the idea.
There is a tremendous choice of more than 1000 varieties of geraniums, in upright and trailing forms. Flower colours range from deep red to pure white, and some cultivars even have variegated leaves. There is also a range of flower-head shapes -- from big, globelike pompons to more open clusters.
The most free flowering are the seed-raised 'Multibloom' varieties, closely followed by the zonal types(those with rounded leaves that open bear a maroon horseshoe marking).
Ivy-leaved trailing geraniums, which look so good in large pots and window boxes, are also very reliable. Martha Washington geraniums(with serrated edges to the leaves) have the showiest flowers, but a much shorter flowering period.
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