![]() ![]() The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse. ![]() The most effective temperatures are between +5 to +12☌, even if germination has started. After this cooling-period the sowing may not be immediately exposed to high temperatures. The sowing is kept moist, and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. The temperature below it usually keeps in the optimum range of –4 to 0☌. It is beneficial to cover the sowing with snow during the cooling-period. It is not so important if the temperature is higher or lower during the cooling period, but the cooling period has to be prolonged because the synthesis of the germination inducer, hormon-like acid, slows down or comes to a standstill. Colder temperatures of –5☌ are only advantageous for most species of the Ranunculus family. After this period the sowing must be kept at a cold temperature (between –4 and +4☌) for another 4–6 weeks. The sowing must be kept warm (about +18 to +22☌) and moist for the first 2–4 weeks. (1) Cold-germinators are still referred to as frost-germinators, although this isn’t quite correct. (does not correspond to the number of plants!): Perennial Plants of the Year/North America.Providing the proper treatment for optimum germination.Storage and Sowing of GOLD NUGGET SEED®.Recommended growing techniques for Lupins.Jelitto: My Recollections of 50 Years in the Seed Trade Pest and Diseases: Slugs, snails, root weevil, root rot, botrytis and powdery mildew can all affect primroses. Possible cut flower or rock garden plant. Divide older plants after they finish blooming.Īdditional qualities: Attracts hummingbirds, bees and butterflies. Maintenance: Remove yellowing leaves whenever present. Primula vulgaris is often sold along with pansies as color spots and treated as annuals, but have the potential to be a short lived perennial given the right conditions. Primula malicoides (fairy primrose) and Primula obconica (poison primrose) are delightful early spring annuals. The majority of primroses are perennial in the Portland area. Some species such as Primula japonica and Primula veris are wetland dwellers while others such as Primula auricula are mountain species perfect for the rock garden. They thrive in fertile, well-drained, acidic soil with regular water (except Primulaauricula like alkaline soil). Origin: Around 400 species are found mostly through out the Northern Hemisphere.Ĭulture: Primroses are woodland dwellers that prefer morning sun, dappled sun or full shade. Drop in to see what is new and blooming! Varieties We will have a rainbow of colors and types. ![]() Clusters of purple flowers, paler at the margins. Here at Portland Nursery we will be carrying a wide range of Primroses this spring. Adrian is an evergreen, perennial, alpine auricula, up to 20cm tall, with rosettes of light green leaves. These types are often grown in pots since they need sharp drainage and lime. Please see our plant list to see which varieties we currently have available. They also have distinctive thick leaves with a powdery coating on the underside. Swallowfields' Auricula Collection Here at Swallowfields we have just over 100 types of auricula in our collection, many of which are available for sale. This includes Primula auricula which has small clusters of flat topped flowers in a unique range of color. The third group is evergreen and heralds from mountainous areas. This group includes the common primroses sold as color spots. Primula vulgaris and Primula veris) bear bunches of flowers on 6-8” stems and bloom winter and/or early spring. They are often short lived, prefer damp soil and reseed. Primula capita and Primula japonica) show off their flowers in tiered clusters of 6-8 blooms on 1-2 ½ ‘ stems. The many types of primroses are divided into three basic categories. Other species such as Primula japonica and Primula veris reseed and create naturalized drifts in the shade garden. Some species such as Primula marginata are more diminutive and perfect for rock gardens or trough containers. Primroses combine fabulously with spring bulbs, evergreen grasses and dusty miller. An explosion of color in every shade of the rainbow, primroses primarily prefer cooler temperatures and therefore bloom early spring through May. The name Primula is derived from the Italian word for spring primavera. Primroses have been a vibrant addition to the spring, woodland garden and containers for over a century. ![]()
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