Dennis Hundscheidt s Tropical Garden

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1 Tropical, Subtropical and Warm Climate Gardening ISSUE 40 COMPOST TEA DANGER PLANTS HUNDSCHEIDT S GARDEN IMPACT PLANTS URBAN TREES $10.95 AUD ISSN WATERWAYS rocks & riffles EDIBLES squash & granadilla WORLD EVENTS garden events FEATURE collector orchids Issue 40 STG 1

2 Dennis Hundscheidt s Tropical Garden Located in the Brisbane suburb of Sunnybank, Dennis Hundscheidt s tropical garden is one of Australia s most widely known and adored gardens, drawing huge crowds whenever it opens. Landscape Architect and Registered Horticulturist Arno King met with Dennis to discuss the garden; provide some tips for readers; and to discuss Dennis plans for the future. 12

NON-NATIVE SPURFLOWERS PLECTRANTHUS Common to cottage gardens and modern

largely native to the southern hemisphere Australia, Africa, Madagascar and

Some of these plants are suited to dry desert conditions while others to warm

Some species have been used for aeons as medicinal plants or as edible plants

3 NON-NATIVE SPURFLOWERS PLECTRANTHUS Common to cottage gardens and modern designs throughout Europe and northern America is a group of plants that are largely native to the southern hemisphere Australia, Africa, Madagascar and into India, Indonesia and the Pacific Islands. Some of these plants are suited to dry desert conditions while others to warm humid climates. Some species have been used for aeons as medicinal plants or as edible plants while some are purely ornamental. In issue 29 editor Paul Plant investigated a range of Australian native species and here we look at some of the common non-native species. 24

Elkhorns & Staghorns the non-natives In addition to the

there is a further fourteen species which occur in Africa,

many of these species can be grown in the subtropics.

4 Elkhorns & Staghorns the non-natives In addition to the Australian species of Platycerium featured in Issue 39 there is a further fourteen species which occur in Africa, South America, southeast Asia and Papua New Guinea in predominantly tropical areas. Heather Knowles continues her investigation, noting that many of these species can be grown in the subtropics. Some struggle, however, and grow much better in the tropical areas of Australia and in other countries. 32

environmental horticulture URBAN TREES THEIR VALUE IN CARBON DIOXIDE SEQUESTRATION Source Text by Prof. Francesco Ferrini. www.georgofili.world/detail.aspx?

01 02 It is now well known that trees sequester and store CO 2 by fixing carbon in permanent forms of biomass.

However, the overall net balance of a patch of vegetation in equilibrium with the surrounding environment can be considered stable in time.

In this regard, the peri-urban forests, city parks and gardens, serving as CO 2 sinks, play a vital role in combating the rising levels of atmospheric carbon dioxide.

5 environmental horticulture URBAN TREES THEIR VALUE IN CARBON DIOXIDE SEQUESTRATION Source Text by Prof. Francesco Ferrini. Printed with permission GEORGOFILI WORLD, Accademia dei Georgofili, Italy. Readers are invited to subscribe to the newsletters on their website It is now well known that trees sequester and store CO 2 by fixing carbon in permanent forms of biomass. The amount of gas exchange between a tree and the atmosphere changes depending on the age and health status of the tree itself. However, the overall net balance of a patch of vegetation in equilibrium with the surrounding environment can be considered stable in time. This balance, however, is altered by man through factors such as an increase in fossil fuel emissions and the relationship between crops and the utilisation of biomass. In this regard, the peri-urban forests, city parks and gardens, serving as CO 2 sinks, play a vital role in combating the rising levels of atmospheric carbon dioxide. For these reasons, some managers of urban green areas around the world are considering whether tree planting in urban areas can be financed through the carbon market. Carbon Trading is a market based mechanism for helping mitigate the increase of CO 2 in the atmosphere. Carbon trading markets with standardised rules of trade are developed to bring buyers and sellers of carbon credits together. It is now an internationally accredited market and somewhat preferred by the buyers. The biggest concern about the projects which plant trees in urban areas and the question we should answer is whether these projects are cost-efficient investments.» 50

6 subtropicalia produce vegies TOOTHACHE PLANT 60

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