August 2, 2007
Watering Bonsai Trees
Never water bonsai trees by a strict schedule, because bonsai trees are really outdoors plants. Outdoors, rain is not so predictable. Bonsai trees may need water even twice daily in hot weather. However, routine daily watering can result in permanent wet compost that grows harmful molds, fungus, and bacteria.
Bonsai trees should be checked daily and watered when needed. The surface of bonsai composts changes color when it dries, becoming lighter. This can take 12 hours to over a week, depending on a many factors, so inspect daily.
Do not assume that when it has rained on your outdoor bonsai tree, that it has had enough water. Many times, rains wet only the upper layers of compost, which is not enough – it will evaporate before it gets to the roots. Provide water when the top half inch of compost has started to dry, and this will vary according to bonsai trees’ individual differences..
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