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Most people who try to overwinter rosemary (Rosmarinus officinalis) inside are familiar with powdery mildew, Erysiphe sp. Similar to the whitefly I discussed in the earlier post, this fungus is favored by the indoor conditions that are typically provided in attempt to overwinter rosemary. Read more »
Although rosemary (Rosmarinus officinalis) is one of the most popular plants at The Cloisters for its great ornamental value and colorful history, this plant does have its problems, which become especially evident when we bring it indoors during the winter months. Read more »
Medieval topiary was relatively simple and non-representational. Woody plants were trained to standards topped by balls, or to a characteristically medieval form known as an estrade, in which the plant was grown in tiers. Although these are rarely represented before 1400, many fifteenth-century artworks show estrades and other simple, geometric forms growing both in pots and in garden beds. The more ornate representational topiary known to the Romans was revived in Renaissance Italy; the Rucellai garden in Florence, created in the second half of the fifteenth century, included animals and human figures, as well as topiary temples and urns.
The practice of artfully clipping and training woody plants into formal or fanciful shapes can be traced back to imperial Rome and the Natural History of Pliny the Elder, who attributes the relatively recent invention of nemora tonsilia or “barbered groves” to one Gaius Matius, a Roman knight and a friend of the Emperor Augustus (John Boardman, The Oxford History of the Roman World, 2001). Read more »