Zonal geraniums are more accurately called ‘Pelargoniums’. In the North of England there can be frosts late in May. In Scotland and on high ground keep your thermometer handy whenever frost is threatened.
After a few good years I got over keen this weekend and lost some good growth and suffered several set backs after an air frost last night.
The zonal is named for the distict ands of colour around the leaf. On this example 3 distinct shades are obvious even though it is a black and white image. These distinctive colours and patterns are quite sought after and some varieties are grown for the leaf shade alone.
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