While they look pretty at first glance, maybe it slipped your mind that bonsai trees go through the same motions as other regular plants. They need proper sunlight, water, and maintenance, or they will suffer from neglect, such as yellowing. When that happens, don’t panic. What you need to do are the following:

Flush Fast

Before making corrections regarding any imbalance, you must cleanse the bonsai’s soil. Use distilled water to water your bonsai. Pour it into the pot, so it collects in the tray. Let the water run off the sides of the pot and collect in the tray until it has completely soaked all of the soil.

Let this dry before watering or adding new nutrients to correct any imbalance. Cleaning your soil will remove toxins and mineral salts that may be contributing to the malnutrition and discolouration of your bonsai.

Fix It with Fertilizer

There are several ways to correct imbalances in bonsai plants. Fertility farmers add more of the nutrient that is lacking, or sometimes they let nature take care of it by reducing the overabundant nutrients. Unique fertiliser formulas include the nutrient needed. 

On the other hand, you can use a nutrient to reduce the amount of another nutrient. Usually, when one nutrient increases, it further decreases in a complementary way. Identifying which nutrient is causing the imbalance is easier if you know the relationship between all the nutrients; this can be done using a soil or tissue test. 

A soil sample kit helps you determine which nutrient is in short supply and needs to be added. The equipment also alerts you to any potential problems caused by excesses. 

Reduce Bonsai Stress

Bonsai trees aren’t supposed to be stressed. Otherwise, they wouldn’t grow properly. When you prune or pinch your bonsai tree, do it when the tree is in perfect health so that it doesn’t get a disease. Your plant should be free of leaf discolouration, nutrient imbalances, and pests and should never have been re-potted.

Water with Consistency

Bonsai trees require different watering techniques depending on the type of tree. Regardless of the kind of tree, though, all bonsai trees need regular, appropriate water. Overwatering could be detrimental to plants since excess moisture in the roots can lead to root rot and mould formation. 

Therefore, you must water your bonsai trees appropriately. Water them when the soil is no longer moist; if it still takes longer than usual to water them and the soil has turned dark or discoloured, you can set them outside in a shady area and let the sun dry off any excess water. The suitable planter or pot for your bonsai tree will have adequate drainage holes in the bottom to help excess water escape.

To make sure your water supply is healthy, use water free of toxins and salts that can affect water flow and nutrients to plants. Rather than using tap water, use distilled water as a safer alternative. If possible, spot-check your water for discolouration on the leaves. If you spot anything wrong, look for a water testing kit on the local gardening sites or ask a professional to test your water.


Yellowing leaves on bonsai trees are often a sign of several things: overwatering, nutrient deficiencies, stress, and cold environments. Fortunately, these trees can recover from yellowing by following several strategies for treating leaf discolouration. When you apply these techniques, you can care for your bonsai plants without worrying about discolouration or any condition that might affect their overall health.

Apply what you’ve learned about your bonsai from Australia after getting one from the Bonsai Shop! We’ve got starter kits, pots, tools, and accessories for those interested. Check out our collection today!