Fertiliser burn, also known as plant burn, is a common issue for gardeners and farmers. It occurs when plants are exposed to excessive amounts of fertiliser, resulting in damaged roots, wilting, and sometimes plant death. Understanding what fertiliser burn is and how to fix it can save your plants and restore their health.
What is Fertiliser Burn?
Fertiliser burn happens when plants absorb too much salt from over-fertilisation. Most fertilisers contain salts like nitrogen, potassium, and phosphorus. While these nutrients are essential, an excess can dehydrate plants by pulling water out of their cells. The signs of fertiliser burn include:
- Brown, crispy leaf edges
- Wilting or drooping leaves
- Yellowing foliage
- Stunted growth
This phenomenon is commonly mistaken for a lack of water, but adding more water without addressing the salt content can worsen the problem.
How to Identify Plant Burn
Plant burn often manifests as visible damage to the leaves and stems of your plants. Here’s how to distinguish it from other plant issues:
- Brown Leaf Edges: The leaf margins dry out and turn brown, giving a “burnt” appearance.
- Drooping Leaves: Plants may appear wilted even when adequately watered.
- White Residue on Soil Surface: Excess salt can build up and crystallise on the soil’s surface.
- Rapid Deterioration: Unlike pest damage, plant burn tends to affect a large portion of the plant quickly.
Spotting these symptoms early is crucial to prevent further damage.
How to Fix Fertiliser Burn
Fixing fertiliser burn involves several steps to restore the balance of nutrients and protect your plants from permanent damage. Follow these steps to mitigate the effects:
1. Flush the Soil
The first step is to leach out excess fertiliser by flushing the soil with water. Here’s how:
- Water the plant thoroughly until water drains from the bottom of the pot or soil.
- Repeat the process over a few days to remove built-up salts.
This method dilutes and washes away the excess fertiliser.
2. Remove Damaged Leaves
Trim any leaves that are severely damaged or burnt. This helps the plant focus on new growth rather than trying to repair already dead tissue.
3. Check and Adjust Fertiliser Use
To prevent further damage:
- Reduce the amount of fertiliser applied.
- Switch to a slow-release or organic fertiliser, which is gentler on plants.
Always follow the manufacturer’s instructions to avoid overfeeding.
4. Repot or Replace Soil (If Necessary)
In severe cases, repotting the plant with fresh soil may be required. This eliminates any residual salts from the fertiliser.
Preventing Fertiliser Burn in the Future
Preventing fertiliser burn is easier than fixing it. Follow these tips to keep your plants healthy:
- Use fertiliser sparingly and according to package directions.
- Test your soil’s nutrient levels to ensure the right balance.
- Water your plants before fertilising to avoid concentrated fertiliser contact with roots.
- Apply fertiliser evenly and avoid piling it up near the base of the plant.
Final Thoughts
Fertiliser burn can be devastating to your plants, but understanding its causes and knowing how to fix it can help you recover quickly. Keep an eye out for symptoms of plant burn and take action at the first signs of trouble. By flushing the soil, removing damaged leaves, and adjusting your fertiliser practices, you can bring your plants back to life and prevent future issues. Proper care and mindful fertilisation will ensure your plants thrive year-round.
By addressing these issues promptly, you’ll protect your garden and enjoy healthier, more vibrant plants.
At Garden Nursery Products, we offer a wide range of premium gardening supplies to help you maintain a healthy and thriving garden. From pesticides, herbicides, and fungicides to fertilisers, landscaping supplies, and more, we have everything you need to care for your plants. Visit our store today and discover top-quality products designed to make your gardening experience easier and more effective.
