Fertilisers are essential for healthy plant growth, but many gardeners make mistakes that can harm their plants, waste money, and even damage the soil. Whether you’re growing vibrant flowers, lush lawns, or productive veggies, knowing how to fertilise correctly is key.
In this article, we’ll explore the most common fertiliser mistakes and how to avoid them, ensuring your garden thrives all year round.
Mistake #1: Over-Fertilising
The Problem:
More isn’t always better. Over-fertilising can lead to:
Nutrient burn (yellowing or browning leaf edges)
Excessive foliage growth with few flowers/fruits
Polluted runoff harming local waterways
How to Avoid It:
Follow the recommended dosage on the label.
Use slow-release fertilisers to prevent nutrient overload.
Observe plant responses if the leaves appear scorched; reduce fertilizer use.
Mistake #2: Using the Wrong Type of Fertiliser
The Problem:
Not all fertilisers are the same. Using the wrong type can result in:
Poor growth (e.g., high-nitrogen fertiliser for flowering plants instead of a high-phosphorus one)
Wasted money on ineffective products
How to Avoid It:
Lawns: High-nitrogen fertilisers (e.g., 20-5-10)
Flowers & Fruits: High-phosphorus fertilisers (e.g., 10-20-10)
Leafy greens: Balanced fertiliser (e.g., 10-10-10)
Mistake #3: Ignoring Soil pH Levels
The Problem:
Soil pH affects nutrient absorption. If the pH is too high or low, plants can’t take up fertiliser effectively.
How to Avoid It:
Test soil pH with a kit
Adjust pH before fertilising:
Acidic soil (pH <6): Add lime
Alkaline soil (pH >7): Add sulphur or compost
Mistake #4: Fertilising at the Wrong Time
The Problem:
Applying fertiliser when plants aren’t actively growing wastes nutrients and can harm roots.
How to Avoid It:
Spring & early summer: Best for most plants (active growth phase)
Avoid winter fertilising (most plants are dormant)
Lawns: Fertilise in early spring and autumn
Mistake #5: Uneven Application
The Problem:
Patchy growth, some areas over-fertilised while others lack nutrients.
How to Avoid It:
Use a spreader for lawns.
For garden beds, mix granular fertiliser into soil evenly.
Liquid fertilisers: Apply with a sprayer for uniform coverage.
Mistake #6: Not Watering After Fertilising
The Problem:
Dry fertiliser can burn roots, while nutrients won’t dissolve and reach plants.
How to Avoid It:
Water thoroughly after applying granular fertiliser.
For liquid fertilisers, dilute as directed.
Mistake #7: Using Expired or Poor-Quality Fertilisers
The Problem:
Old or cheap fertilisers may lose potency or contain harmful fillers.
How to Avoid It:
Check expiry dates.
Buy from trusted suppliers like Garden Nursery Products.
Store fertilisers in a cool, dry place.
Mistake #8: Neglecting Organic Options
The Problem:
Synthetic fertilisers can degrade soil health over time.
How to Avoid It:
Use compost, manure, or seaweed-based fertilisers.
Improves soil structure and microbial activity.
Mistake #9: Fertilising Stressed or Dormant Plants
The Problem:
Plants under stress (drought, disease) can’t use extra nutrients.
How to Avoid It:
Only fertilise healthy, actively growing plants.
Address stress factors (watering, pests) first.
Mistake #10: Not Reading Instructions
The Problem:
Every fertiliser has specific guidelines; ignoring them leads to poor results.
How to Avoid It:
Always read the label for dosage, timing, and application methods.
Where to Find Quality Garden Supplies
Avoiding these fertiliser mistakes will help your garden flourish while saving time and money. If you need expert advice, Garden Nursery Products has you covered!
Located in Gold Coast, we stock everything for your gardening needs, like premium fertilisers, pesticides, fungicides, landscaping supplies, and more. Visit us today for top-quality products or shop online!
