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6 Reasons Why Your Plants Are Going Yellow

As a wholesale plant nursery, we understand the frustrations that come with seeing your plants turn yellow. Yellowing leaves can be a sign that something is amiss with your plant's health. While it's normal for some leaves to change colour and fall off over time, persistent yellowing can be cause for concern. In this blog post, we'll explore six common reasons why your plants may be going yellow and provide tips on how to address each issue.


1. Overwatering:

One of the most common culprits of yellowing leaves is overwatering. Excess moisture can lead to root rot, depriving your plant of essential oxygen and nutrients. To remedy this, ensure that your plant's pot has proper drainage, and adjust your watering schedule by allowing the top inch or so of the soil to dry out before watering again.



2. Underwatering:

Conversely, underwatering can also result in yellowing leaves. When a plant lacks sufficient water, it struggles to transport nutrients, causing its leaves to yellow and wilt. To prevent this, establish a regular watering routine based on your plant's specific needs, and always water deeply to encourage strong root growth.


At this point you’re probably wondering how the heck do you keep just the right balance between overwatering and underwatering?! A simple solution is to invest in a basic soil moisture meter, say $35, and it will be an invaluable help to you and save a lot of guessing. Other than that, pushing your finger into the soil or even tipping it out of it’s pot and touching the root ball on the back of your hand are simple methods. If you get the root ball out, you can also try squeezing it – if water runs out it is too wet!


3. Nutrient Deficiencies:

Yellowing leaves can be a sign that your plants are not receiving the essential nutrients they need. Nitrogen, iron, and magnesium deficiencies are common culprits. To address this issue, consider using a balanced fertiliser and be mindful of the specific nutrient requirements of your plant species.


4. Poor Soil Quality:

The health of your plants is closely tied to the quality of the soil they are planted in. Compacted, nutrient-poor, or overly acidic soil can lead to nutrient uptake problems. Regularly test and amend your soil to maintain the optimal pH level and nutrient content for your plants.


5. Pests and Diseases:

Insects and diseases can stress your plants, leading to yellowing leaves. Aphids, mealybugs, and spider mites are common pests that can cause discoloration. Regularly inspect your plants for signs of infestation, and take prompt action to address any issues. Consider using natural or chemical treatments, depending on the severity of the problem.


6. Environmental Stress:

Changes in environmental conditions can also contribute to yellowing leaves. One of the biggest factors can be planting your plants too deep, causing the plant to start rotting around the stem. Excessive exposure to direct sunlight, extreme temperatures, or drafts can all stress your plants. Ensure that your plants are in the right location for their species, and adjust their environment as needed to provide optimal growing conditions.


In conclusion, understanding the reasons behind your plants' yellowing leaves is the first step to nurse them back to health. Regular monitoring and proper care are key to maintaining the vibrancy and vitality of your plants. If you are unsure about the specific needs of your plant species, don't hesitate to consult with a horticulturist or your local nursery for expert guidance.


Remember, a little extra attention and care can go a long way in keeping your plants lush and green. By identifying and addressing the underlying causes of yellowing leaves, you'll be well on your way to having a thriving, beautiful garden. Happy gardening!

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