Granular fertilisers are small, nutrient-rich pellets that release nutrients like nitrogen, phosphorus and potassium slowly into the soil. This slow release means your plants get a steady supply of nutrients over time, for healthier and more vigorous growth. Here, you’ll learn what granular fertilisers are, the different types available, how to use them and the benefits for your garden.
Key Points
Granular fertilisers provide a steady supply of nutrients over time, so you don’t need to apply as often and prevent nutrient leaching.
Apply granular fertilisers in the morning or evening using broadcasting, side dressing or incorporating into soil for best results.
Soil testing is essential for fertiliser application, to avoid over fertilising or under fertilising and to get tailored nutrient management.
What are Granular Fertilisers?
Granular fertilisers are small, uniform pellets with nitrogen, phosphorus, potassium and balanced fertiliser. These nutrients are released slowly into the soil, providing a steady supply over time. This slow release is especially good as it prevents nutrient leaching and ensures plants get a consistent supply of nutrients.
The release time of these slow release fertilisers can be 3 to 9 months, so they are suitable for different types of plants and soil conditions. This long term effect means you don’t need to apply as often, saving you time and effort and healthy plant growth.
Types of Granular Fertilisers
Granular fertilisers come in two main types: organic and synthetic. Organic fertilisers are derived from plant based materials such as compost and animal manure and the nutrient content can vary depending on the source. Synthetic fertilisers are chemically manufactured and have higher concentration of nutrients which can give immediate results.
Slow release fertilisers provide gradual nutrient delivery, benefits plants over a longer period and reduce nutrient runoff. Depending on your garden needs, there are different formulations available that targets different nutritional needs of plants, including water soluble fertiliser.
When and How to Apply Granular Fertilisers
Timing is everything when applying granular fertilisers. The best time to apply is in the morning or evening when plant growth is most active. For edible crops, fertilise in the spring before planting or around seedlings after sowing. Applying just before a good rain can also help the nutrients to penetrate the soil better.
You can apply granular fertilisers using different methods to get uniform coverage. Broadcasting, side dressing and incorporating into soil are the common methods, each suitable for different garden setup and plant types.
Broadcasting
Broadcasting is a good way to apply granular fertilisers over a large area to get uniform coverage in your garden. This method is suitable for different garden types and promotes overall plant health by providing uniform nutrients.
Measure the required amount of fertiliser based on your garden size and plant needs. Spread the fertiliser evenly over the soil surface using a handheld or wheeled spreader. Walk in straight lines and overlap slightly on each pass to get even coverage. Apply evenly for best results.
For better accuracy, you can divide the total amount into smaller batches and apply in two directions. After application, lightly rake the soil to incorporate the fertiliser and for better nutrient absorption.
Side Dressing
Side dressing is placing the fertiliser near the base of the plant to deliver nutrients without disturbing the roots. This method is good for vegetables and other high demand plants so they can get the nutrients right where they need it most.
Incorporating into Soil
Incorporating granular fertilisers into the soil is another way. After application, these fertilisers should be mixed or watered into the top 3 to 5 inches of soil. This will help the plants to absorb the nutrients and reduce nutrient runoff.
This method improves soil health and promotes plant growth. Working the fertiliser into the soil ensures the nutrients reach the plant roots more efficiently, healthier and more productive plants all season long.
Benefits of Granular Fertilisers
Granular fertilisers provide a steady supply of nutrients, prevent nutrient leaching and efficient nutrient use. Their slow release nature allows plants to have access to essential nutrients over a longer period which is important for plant health.
The solid form of granular fertilisers makes it easy to handle, store and apply. Organic granular fertilisers are less likely to burn or damage plants even if applied in large quantities. Also, they improve soil health by replenishing nutrients and promoting beneficial microbial activity over time.
But note that synthetic can cause nutrient runoff if not managed well.
Common Mistakes to Avoid
One of the common mistake gardeners do is overusing synthetic fertilisers which can damage plant roots and leach nutrients into water systems. Applying too much fertiliser can also cause root burn and hinder plant growth. Follow the recommended application rate to avoid these problems.
Another mistake is applying fertiliser at the wrong time which can hinder nutrient absorption. Broadcasting fertiliser on plant leaves instead of soil can also reduce nutrient access to roots. Applying fertilisers directly to the soil and at the right time means effective foliar feeding.
Soil Testing
Soil testing is important for optimizing fertiliser application. Not doing soil testing can lead to over fertilisation or under fertilisation both of which can harm plants. Soil testing will give you the chemical, physical and biological characteristics of the soil so you can make informed decision on nutrient management.
Soil testing supports sustainable agriculture by promoting responsible nutrient use. They will identify specific nutrient deficiencies so fertiliser can be applied effectively. By matching nutrient management plan to crop requirements soil testing can boost plant growth and soil health.
Granular Fertilisers with Other Nutrient Sources
Combining granular fertilisers with other nutrient sources like compost and animal manure including rotten manure can boost plant nutrition. This way you can have a balanced and complete nutrient supply for different plants. Granular fertilisers release nutrients gradually so you have a steady supply over time.
Besides improving plant health this combination can also improve soil structure and fertility for long term garden sustainability. Multiple nutrient sources create a synergy that maximizes plant growth and productivity.
What We Think!
Granular fertilisers are a versatile and effective tool for gardeners, has steady nutrient supply and promotes healthy plant growth. By knowing the types, application method and benefits of granular fertilisers and avoiding common mistakes and soil testing gardeners can optimize their fertilisation. Combining granular fertilisers with other nutrient sources makes the garden healthier and more productive. Try these and have a thriving and sustainable garden.
FAQs
What are granular fertilisers?
- Granular fertilisers are small uniform granules that release nutrients slowly into the soil to provide steady supply of nutrients to plants over time. This controlled release helps to boost plant growth and health.
When to apply granular fertilisers?
- Best time to apply granular fertilisers is in the morning or evening when plants are in their peak growth period for better absorption.
What are the benefits of organic granular fertilisers?
- Organic granular fertilisers improves soil health, supports beneficial microorganisms and minimizes plant burn so it’s a safe and effective for sustainable gardening.
How to avoid over fertilisation?
- To avoid over fertilization do soil testing regularly to customize your nutrient management plan and follow the recommended application rate. This will ensure balanced fertilization and protect your plants.
Can I combine granular fertilisers with other nutrient sources?
- Yes, you can combine granular fertilisers with compost, animal manure and other nutrient sources.