Portulacaria afra As yet I have not seen one bloom in Florida; this may be do to the fact that we do not allow our plants to become sufficiently dry. Portulacaria afra, also called Elephant plant or Small-leaf jade is relatively new in bonsai but one that almost anyone can grow because it is succulent. Since Portulacaria can withstand long periods without water they are excellent plants for beginners. Advanced students of bonsai like them because they adapt to any style and develop relatively fast. Since Portulacaria is native to South Africa, it will not be possible for most people to find large old specimens to collect but pre-bonsai are available from bonsai dealers that sell tropical plants. When looking at an untrained plant in a nursery it may be difficult for the beginner to visualize a finished bonsai in this tangled mess of branches; but after the unneeded branches are removed you can always find an interesting trunk line.
Cultivation Portulacaria will tolerate a variety of growing conditions. Like all tropicals it must be protected from long periods of cold temperatures below 40 degrees. It can be grown outdoors in full sun or indoor if give sufficient light. The plant will develop very fast when given proper care which includes heavy applications of fertilizer. Plants growing outdoors in full sun always need more fertilizer and water than those growing indoors. When removing branches, all cuts should be flush rather than concave since deep cuts may leave unwanted scars. It is not necessary to seal any of the cuts.
Indoors Everyone I have talked to that grows this plant indoors agrees that light is the limiting factor for a healthy plant. They can be successfully grown on windowsills or with artificial light. When growing near a window keep in mind that trees or other buildings nearby may affect the amount of light your plant receives. If you are using florescent grow lights it is important to place the light very close to the bonsai. Soil Portulacaria does not require any special soil mix; whatever you are using for your other bonsai will probably be satisfactory. Good drainage is always important.
Water Although the plant is a succulent it is not as particular about over-watering as most other succulents. If the soil you are using drains well you shouldn’t have any problems, always allow the soil to approach dryness before watering. Fertilizer No special fertilizer is required; any balanced formula will be satisfactory. When repotting I use a slow release fertilizer which can be mixed in the soil, this can be supplemented with liquid 20-20-20 as needed. Since these plants are such fast growers they will need to be fertilized more often than you do with your other bonsai to maintain a dark green foliage.
Styling This plant adapts to any style including cascades and forest plantings. Since it is succulent and most of the water is contained in the trunk and branches. It is not practical to style the tree with long horizontal branches as they tend to droop because of their weight. This characteristic makes them excellent plants for full cascades. This plant tolerates drastic pruning if you allow the soil to dry completely before removing large branches and roots.
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