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When you see leaves of your plant turning yellow or burning or browning at it tips or edges, it’s time to investigate and find out the possible cause and solution to it. You must be aware of these problems to keep your plants stress free and healthy! The First broad diagnosis that should come to your mind is – YOUR PLANT IS IN STRESS and then you further start investigating and finding out the exact reason for this problem. We will start listing the top 10 reasons for this problem in descending order.
10. Natural aging of the plant: This is one obvious reason for yellow leaves. If you see older leaves especially at the bottom of the plant turning yellow, just ignore it. This is not a reason to worry.
9. Pest Attacks: Sucking pests like aphids, mealybugs, whiteflies, thrips and mites can damage the leaves and can cause yellowing of leaves. You know Prevention is better than cure. These can be easily prevented or even treated organically using Neem oil spray regularly for treatment as well as prevention. Spray neem oil once every 15 days as a preventive measure and weekly once or even twice for treatment of these pests. You can check my detailed post on NEEM OIL.
8. Root bound plants: “Root bound” plant means that the roots of a plant have completely taken up the space within the pot, often circling and creating a dense web of roots. This can stress the plant and deprive it of nutrients, air, and water and this can result in leaf yellowing and stunted growth of the plant. Just repot the plant in a larger container or carefully perform root pruning if you wish to use the same container.
7. Transplant Shock: This is another reason for leaf yellowing and leaf drop. This is the period of stress to the plant when you just repot a plant. You can solve this to a certain extent by repotting your plant carefully and after repotting for the next one week keep the plant in shade away from direct sunlight. Water the plant once thoroughly with Epsom salt solution to counter this transplant shock. 5 to 10 gms of Epsom salt per litre of water is the recommended dosage. You can watch my detailed video on the 10 golden rules of Repotting a plant.
6. Fertilizer Overuse: If you observe a strange pattern to yellowing of leaves, like if the veins on the leaves are green and the tissue is getting yellow or the edges or tips are yellow or looking like burnt along with bud drop off or fruit drop off, then it is mostly due to fertilizer misuse.
Commonly overuse of fertilizers is the problem, so it is important to use fertilizer at the recommended dosage. This problem is more common with the use of chemical fertilizers like Urea, DAP or NPK granules and not a problem with organic fertilizers.
And moreover, people tend to use too much fertilizer on their plants to make them grow faster, especially newbie gardeners. But what it actually does is, it creates a toxic effect on the plant which “burns” the leaves and turns them yellow.
5. High Soil PH – that is too alkaline soil: This can also be one of the reasons for leaves turning yellow. This is little difficult to diagnose unless you have a soil ph testing gadget. This simple ph testing gadget will give you a rough idea about the soil PH whether acidic or alkaline soil. Most plants need a slightly acidic ph of around 6.5 for best absorption of nutrients.
4. Temperature: Leaves start turning yellow when it is either too hot or too cold. In terms of the cold temperatures, like for example adenium plants, the leaves start yellowing in winter and eventually fall off and the plant goes into the dormant state in winter. That’s called Winter Dormancy and applies to many other plants as well.
3. Sunlight: Reduced exposure to light is another common reason for plant leaves to turn yellow because not enough light is reaching the plant for photosynthesis. Similarly, Too much exposure to hot direct sun is another common reason for tips and edges of leaves to turn dry and brown. This can be corrected easily by knowing your plant by its name or atleast whether it’s a sun loving plant or a shade loving plant. Knowing a plant by its name is very important to learn about its care tips especially its light requirement and provide optimum exposure to sunlight. A simple free app to know a plant id is google lens app provided by google. You can watch my detailed episode on GOOGLE LENS.
2. Improper Watering: We will discuss this in detail, please watch carefully to understand the concepts. Improper watering can present as either leaf yellowing or leaf drying or leaf burning at tips and edges. The most common reason that plants’ leaves turn yellow is because of moisture stress, which can be from either over watering or under watering. Similarly, the most common cause for brown leaf tips or brown edges on leaves is the plant not getting enough water, I repeat, the plant NOT GETTING ENOUGH WATER which can be due to several reasons apart from you not watering the plant adequately.
One Simple Common sense Hint here for watering is: Generally, Indoor plants are more prone to over watering and outdoor plants are more prone to under watering.