Plant Hardiness Zones are created by finding the average low temperature within the area and grouping similar low temperatures into one of 11 specific zones. Plant Common Name. Planting a garden is an investment of both time and money. The Sunset zones, popularized and researched by Sunset Magazine, are derived from climate zones developed by the University of California Cooperative Extension. This means that the major influence on climate is the continental air mass; the ocean determines the climate no more than 15 percent of the time. Here is the description: ZONE 34. General Description. Zone 13, on the other hand, averages more than 11 months between killing frosts, when it gets them at all. Subscribe to our newsletter Click Here. The mild days and chilly nights during the growing season extend the bloom of summer perennials like columbines and Shasta daisies. Zone 12 averages about 8 months between freezes, 9 months between killing frosts of 28°F (–2°C) or lower. But it enjoys considerably more heat than Zone 24—enough to put the sweetness in ‘Valencia’ oranges, for example—but not enough for ‘Washington’ naval oranges, which are grown farther inland. through late Nov. Summers are hot and dry; rain comes in winter, when lows reach 28 degrees to 10 degrees F/-2 degrees to -12 degrees C. Plants from the Mediterranean and Near Eastern regions thrive here. One of the most favored areas in North America for growing subtropical plants, Zone 23 has always been Southern California’s best zone for avocados. Actually, the winters are so mild here that lows seldom fall below freezing. Hardiness zones provide a basis for communication for people from vastly different places to network gardening information. ZONE 2B: Warmer-summer intermountain climate. In years when snow comes late or leaves early, protect plants with a 5- or 6-inch layer of organic mulch. Just keep them well watered. Sunset zones were developed by the Sunset Publishing Corporation and although originally developed for the West, there are 51 zones to cover all fifty states and adjacent Canada and Mexico. 0 sur 5 Ajouter au panier; Terrier coloris Noix de Galle – Echeveau de laine belge – 100 grammes / 330 mètres – Teint à la main avec des plantes € 18,00. It can be so hot for so long that I wilt along with the plants. Winter temperatures are milder than in neighboring Zone 2a, minimums averaging from 12 to 22°F (–11 to –6°C),with extremes in the –10 to –20°F (–23 to –29°C) range. A lake for everyone, confessions of a pool crasher, and the BBQ king of California. Well, for me, July is usually like the dessicating blast from a furnace. These are considerably higher than the temperatures in neighboring Zone 18. Disclaimer: The information provided here was gathered from research literature published by other organizations. of Sunset Publishing Corporation. ZONE 22: Cold-winter portions of Southern California’s coastal climate. It is too hot, too cold, and too dry for fuchsias but cold enough for tree … It is too hot, too cold, and too dry for fuchsias but cold enough for tree … In this climate, gardens that include such plants as ornamental figs, rubber trees, and scheffleras can become jungles. Plants that grow well here, but not in much colder zones, include bougainvillea, bouvardia, calocephalus, Cape chestnut (Calodendrum), flame pea (Chorizema), several kinds of coral tree (Erythrina), livistona palms, Mexican blue and San Jose hesper palms (Brahea armata, B. brandegeei), giant Burmese honeysuckle (Lonicera hildebrandiana), myoporum, several of the more tender pittosporums, and lady palm (Rhapis excelsa). When temperatures drop below that, orchardists can lose even their trees. However each plant’s hardiness is not the only factor that will determine its success. 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