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Tree courses - Invercargill

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Acacias

  Become an expert on Acacias Acacias occur naturally mainly in dry tropical or mild temperate regions.  Authorities vary on the exact number of species that exist, but more are native to Australia than anywhere else. Other species are as wide spread as Africa, America and South East Asia. Some occur naturally in snow prone areas, and can withstand very harsh winter conditions. Acacias are mostly shrubs and trees. Some are very low growing and can be used effectively as ground covers. Growing Acacias in areas outside of their natural conditions can be somewhat unpredictable and variable. Some have adapted well as garden plants, or as windbreak or screening plants. Others have become weeds when transplanted beyond their indigenous area. Some have other uses and a number are even farmed commercially to produce products as diverse as extracts for medicines, oil for the perfume industry, edible food products, and timber products for fencing, furniture and building construction. This course attempts to develop your ability to both identify and use different Acacias.
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Arboriculture For Beginners

  All too often trees are the forgotten giants of our garden areas. A shrub or ground cover plant is far closer to the human eye than a tree, and these plants usually get most of our attention because they are so easily seen. With trees it often seems to be "out of sight, out of mind". Trees are in fact potentially far greater problems than shrubs. If a shrub blows over, it creates a bit of a mess and a gap in the garden bed. If a tree blows over, it can destroy half the garden, make a large hole in the roof of a house, or crush your new car. Trees, like people, can be hurt, they can get sick, and sooner or later they will die. They need to be fed and watered, and they do need "doctoring" if their life is to be extended to the fullest. Some trees, like some people, are hardier and never seem to become ill. In the same way, however, many trees have "medical" problems which no one seems to notice until it is too late!
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Eucalypts

  Learn about Eucalyptus : their identification, culture (propagation, soils, landscape uses, pests, feeding), and uses. Throughout the course you build both a knowledge of the group as a whole, and of the range of species you can identify. Eucalypts are today widely grown throughout the world, despite the fact that they are predominantly an Australian native plant (Note: There are only a small number of species which occur naturally outside of Australia). In many countries Eucalypts are used extensively as a forest tree, for land rehabilitation or even as an ornamental plant. There are more than five hundred different species of Eucalypts, varying from relatively low shrubby plants to massive tall trees. “They are not just ‘Gum trees’ as they are known in Australia. They are an important part of the natural landscape and grow all over the world. Learn all about this Aussie Icon from the experts.”- Tracey Morris Dip.Hort., Cert.Hort., Cert III Organic Farming.
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Growing Camellias

  Camellias are a hardy group of plants that are grown from cool temperate climates through to tropical regions. While many Camellia species are highly adaptable, the best results are generally achieved by choosing cultivars to suit the climate and conditions you are growing them in. Tea leaves are derived from the plant Camellia sinensis, a species that does well in tropical and sub tropical conditions. Other species, (eg. Camellia reticulata) does not adapt so well to warm climates, and is generally far better in a cool temperate climate. Camellia oleifera is another species grown as a commercial crop oil from this species is used commercially in china. The three most common ornamental species are: Camellia japonica mainly bred varieties from the original, smaller flowered species. Camellia sasanqua species from Japan, smaller flowers than C. japonica. Camellia reticulata species from China.
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Growing Grevilleas

  Develop your ability to select and cultivate appropriate varieties of Grevilleas in different situations. Grevilleas are a wide group of plants, all but seven species coming from Australia. They are widespread across Australia, occurring in both cool temperate, and hot tropical climates. There are around 250 species. About half of these are native to the south west corner of Australia. Known commonly as “Spider Flowers”; the Grevillea flower is more like a brush than a traditional flower. It has obscure petals, but is none the less very colourful. Flower colour varies greatly; and most hold their flowers for a long period. Grevilleas include both small to very large plants (from prostrate ground covers, through small and medium shrubs up to large trees). Their hardiness is variable according to species. The foliage is also variable ranging from small, entire leaves to lobed or pinnate leaves. All are arranged alternately on the stems and some have hairy undersurfaces.  Most have a medium to fast growth rate. “There are so many of these wonderful colourful plants in our gardens today. Not only are they striking to look at, they also attract birdlife. It really is worth getting to know them a little bit better.”- Tracey Morris Dip.Hort., Cert.Hort., Cert III Organic Farming.
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