Wholesale Fertiliser

Buy fertiliser in bulk with Dejex

Dejex supplies a fantastic range of fertilisers in bulk quantities for businesses and professional growers throughout the UK. Our products contain concentrated and delicately balanced sources of vital plant nutrients to keep ornamental, nursery stock and edible plants in optimum condition. From general purpose granular fertiliser to specialist slow release fertilisers, controlled release and growth stimulants, our wholesale fertiliser range includes a variety of critical products for horticultural businesses. Order your fertiliser in bulk online or get in touch with our team for tailored advice.

The different types of fertiliser explained

Choosing the right fertiliser requires in-depth knowledge of the nutrients and conditions that various plants need to flourish. Here is more information on the main fertiliser types often requested by our retail and commercial customers, along with how and where they can be applied.

Straights vs compounds

You’ll notice that we sell a selection of straight fertilisers and compound fertilisers. Compounds are the most commonly used. These kinds of all-purpose plant feeds contain an effective mix of all the main nutrients and are designed to be applied several times a year. Specialist compounds are also available, including lawn feeds for healthy grass growth. Straight fertilisers, on the other hand, tend to contain one main nutrient. They are typically used to correct deficiencies in the soil or hydroponics. Examples include sulphate of ammonia (which supplies nitrogen); sulphate of potash (which includes high levels of potassium); magnesium sulphate; and iron sulphate.


High acidity fertilisers can be used to help raise acidity levels when the substrate is required to reach a lower pH for free-moving nutrients. Options include nitric acid, phosphoric acid, sodium chlorite, hydrochloric acid, and sodium hypochlorite, or compounds such as the hakaphos calcidic range.

Controlled or slow-release fertilisers

Controlled release fertilisers are intended to release nutrients into the substrate over time. They are often coated with plastic resin or sulphur-based polymers that will react much slower with water, heat, and sunlight, ensuring a steady stream of nutrients rather than a quick (and often damaging) flush of macronutrients. Slow-release fertilisers use additives to break down nutrients into available forms.

High potash fertilisers

High potash fertilisers help plants that bear fruits or flowers in the generative stage. Using products such as rose fertiliser and tomato fertiliser on these specific plants will almost guarantee a better yield, resulting in better blooms, bigger crops, and better profits.

High nitrogen fertilisers

Nitrogen plays an important role in vegetative development. When growing, it’s particularly important to ensure there’s enough nitrogen in your soil at all times, as this particular element can be leached away during heavy rains or excessive irrigation. Nitrogen fertiliser can be applied at all growth stages to give your plants a healthier, greener appearance. Many experts prefer to use slow-release nitrogen-rich products, such as the Novatec One range, available here.

Getting to grips with NPK numbers

When deciding which fertilisers to use, you’ll also want to make sure you select products with varying NPK ratios. Each NPK fertilisers numbers will reflect the percentage of key plant nutrients – nitrogen (N), phosphorus (P) and potassium (K) – within the mix. These are the substances that need to be regularly replenished within depleted soil.

The benefits of investing in organic fertiliser

Organic fertilisers are becoming increasingly popular amongst our eco-conscious customers. As their name suggests, these products are made from organic matter, such as fish, bone meal, and plants. Not only can they be more environmentally friendly than their inorganic counterparts, they also usually create a stronger soil structure, with the capacity for enhanced carbon storage and the ability to hold water for longer. However, they are often slower to act than fertiliser that has been created synthetically or using naturally occurring minerals. You will need to consider this behaviour when investing in wholesale organic fertiliser for your growing business, as it will affect your management schedule.