Become a Succulent and Cacti Expert -
- Learn to identify and grow many different succulents and cacti
- For the enthusiast or commercial grower.
- Start a business or further your career prospects
- Study anytime, from anywhere and at your own pace
Lesson Structure
There are 8 lessons in this course:
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Introduction
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Review of the system of plant identification
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Physiology
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Information sources
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Culture A.
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Planting
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Staking
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Mulching
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Soils
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Feeding
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Pruning etc.
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Propagation
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Methods of propagating cacti & succulent plants
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Propagation of selected varieties
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Using Cacti & Succulents
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Culture B.
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Pest & Disease
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Irrigation
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Greenhouse growing
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Cacti developing your plant knowledge.
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Succulents developing your plant knowledge.
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Special Project
Aims
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Develop knowledge of botanical naming conventions and their application in understanding the horticultural potential of cacti and succulents.
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Evaluate needs then select or improvie growing media for cacti and succulents
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Propagate different types of cacti and succulents
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Explain a range of uses for cacti and succulents
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Manage growing conditions for cacti and succulents
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Explain the cultivation of a range of cacti.
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Explain the cultivation of a range of succulents.
What is a Succulent?
The Oxford Dictionary defines a succulent as
“having thick, fleshy leaves or stems, adapted to storing water”. Other definitions also include roots. Some definitions on the other hand only include leaves, which excludes many plants that botanists generally considered as succulents, such as cacti and other stem succulents.
Defining succulents is further complicated as the degree of succulence varies. The thicker the plant's structure is and the more water it contains, the more succulent it is. Some plants are very succulent while others are barely succulent.
Cacti are succulents who are members of just one particular botanical family. Other succulents belong to a wide range of other families. They all share succulent characteristics; but cacti have other characteristics that set them apart.
How then Do Succulents Conserve Water?
Different succulents have different mechanisms. The root hairs on most flowering plants, including succulents, will die off during times of drought, and regrow when the soil becomes moist again. The thing that is different about most succulents, is that their root hairs can regrow much faster than other plants. After rain, succulent root hairs may grow back and begin absorbing water and nutrients within 24 hours.
Plants have stomata on the surface of their leaves and stems. The stomata can open to allow carbon dioxide to enter the plant. Carbon dioxide is needed for photosynthesis. The stomata are also involved in transpiration. When they are open, the stomata allow water vapour to escape. In most plants the stomata are open during the day. In many succulent plants, on the other hand, the stomata are closed during the day and open at night, reducing the loss of water. In these plants the uptake and fixation of carbon dioxide occurs at night. Carbon dioxide is stored in form of malic acid until it is released during the day for photosynthesis. Plants with this carbon fixation pathway are known as CAM plants.