![]() ![]() The wax-secreting glands on these and other edged forms of Show Auriculas are identical with those on the foliage of the plants, whereas that found on the flowers of Border Auriculas and Selfs are of a slightly different shape.įarina may occur on any part of the plant, or on several or all parts. The appearance of gray farina on the rare gray-edged Show Auriculas is caused by a thin overlay of white farina upon a green ground. Yellow farina is less commonly found, however. marginata and the underside of the leaves of P. In color, farina is either white or very pale yellow, as in the leaf edges of P. They are glandular in character and secrete an opaque wax, which in chemical structure in remarkably similar to the more common floral coloring pigments. This meal is formed by a multiplicity of microscopic hairs, shaped like slender, blunt-nosed rods. It is a phenomenon rarely found in Flora = s kingdom, being almost peculiar to the genus Primula. The word farina is taken from the Latin, and means flour, or meal, an apt description of its physical appearance. The information is probably still current, but if anyone has more up-to-date information, please contact the Webmaster or the Editor of the Primroses quarterly.Įxcerpt from the Primroses Quarterly, Volume 2, Issue 2 (October 1944) p.23: The Nature of Farina by Donald O’ Connell They are taken from early issues of our quarterly journal. The articles on the following two web pages try to explain what farina is. Another word is ‘meal’, which is just another word for flour! In some cases ‘paste’ is used, usually denoting a much thicker kind of white coating in the center of some Auricula flowers. The term ‘farina’ means flour, which is what the powdery coating looks like. In some species this powder is even fragrant! It even gives one of the species its name: Primula pulverulenta means ‘powdery primrose’. For example, it is a delightful (and required) embellishment of the Show Self and Edged Auriculas. In fact, to most Primula enthusiasts it enhances the appearance of the plant. This is not a kind of fungus such as powdery mildew, but is a substance produced by healthy plants. When they have finished blooming in the house it is best to plant them directly into the garden, or summer them outdoors in their pots and move back to the house at the end of the summer.Many species of Primula exhibit a white or yellowish powder on their leaves and even flowers. Another way to prolong bloom is to give regular doses of half-strength fertilizer solution. To prolong indoor blooming, primroses should be kept in a cool environment. These are thirsty plants and they like having cool roots. Daytime temperatures must remain below 80☏. Primroses may be grown indoors if you are able to provide them with cool night temperatures of 50-60☏, high humidity, filtered sun and moist soil. Primroses need to be planted so that their crown is right at soil level and at least six inches apart. ![]() They should be planted in a cool, partly shady area in the garden with rich, well-draining, slightly acid soil (pH 6.5). They are quite tolerant of being transplanted, even when they are in bloom. May go dormant in climates with hot, humid summers. They appreciate full sun in the spring, but must have semi-shade as the temperatures warm. ![]() Primroses prefer cool temperatures, a rich humus soil (lots of compost and leaf mold) and partial shade. ![]()
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