Skip to content

So you can use blue grain fertilizer in the garden: Advantages and disadvantages of the complete fertilizer for amateur gardeners.

Nitrophoska is the trade name of the mineral fertilizer colloquially known as blue grain fertilizer in the garden. BASF was the first to develop this mineral compound fertilizer and called complete fertilizer. The brand name was created from the first parts of the three main nutrients nitrate, phosphate and potassium. This artificial fertilizer is suitable mainly for agriculture, but amateur gardeners also use it in horticulture. However, the controversial impact of the substance on the environment has caused much debate. Here are some tips and information about its properties that might help you with its application to lawns and plants.

How to turn the chemical blue grain fertilizer in the garden

professional gardener sieves blue grain fertilizer into a container

Blue grain is an artificial fertilizer that is very controversial among amateur gardeners. Therefore, if you want to use it in the garden, you should pay special attention to its composition. Almost every gardener has certainly come into contact with it. While some do not want to do without the complex fertilizer, others argue about its effectiveness, especially when it comes to particularly dependent exotics. The fact is that most plants need fertilization to thrive . Only if the soil is rich in nutrients, you can do without additional fertilizer. Otherwise, the amateur gardener must help decide for themselves whether it must be the blue corn fertilizer, which, incidentally, is often used in commercial horticulture. In addition, it is recommended to find out in advance what this composition consists of.

What is blue grain fertilizer and how to use it?

blue fertilizer controversial among hobby gardeners because of environmental pollution

Blue grain is a chemically produced complete fertilizer, which is commercially available as granules or in liquid form. The small beads are colored blue, hence the product name. Since blue grain fertilizer (blue fertilizer for short) is a universal fertilizer, it can be used for all garden and potted plants. Theoretically, you can also use it in lawn care, but extreme care is required here. If too much fertilizer spreads, it can affect your lawn. If you do want to fertilize your plants with it, be careful not to create piles of manure. Overdosing can damage the plant down to the roots. Therefore, you should rather use it sparingly, with less meaning more. In addition, you can dilute the liquid blue corn fertilizer with water. The mixing ratio can be found on the label of the bottle. As granules or in liquid form, such fertilization would be best between March and October. However, the ideal time is spring (March to May), because the temperatures are not so high and it rains more often.

What composition in the blue grain fertilizer provides in the garden.

spread blue grain fertilizer on garden soil and spread with gardening tools

Blue grain belongs to the complex fertilizers, as it consists of several main nutrients. The exact composition varies from manufacturer to manufacturer. In professional circles, blue grain is also called NPK fertilizer because of the ingredients (N for nitrogen, P for phosphorus, K for potassium). Furthermore, depending on the manufacturer, the blue grain still contains growth-promoting trace elements. The combination 12.12.17 + 2 is practically the standard composition of blue grain for such a complete fertilizer. This means as follows: Nitrogen 12% (nitrate nitrogen and ammonium nitrogen), phosphate 12% (water soluble), potassium 17%, magnesium 2%. There are now many different compositions on the market, with combinations such as 14 + 7 + 17 + 2 or 21 + 5 + 10 (+ 3 + 6). The latter contains magnesium as well as sulfur. By the way, noname products are already available for around one euro per kilogram, but you have to dig deeper into your pocket for branded products.

Is blue grain toxic?

apply chemical complete fertilizer as blue grain fertilizer in the garden

The fact is that blue grain is an artificial fertilizer and therefore not comparable with compost. If you want to use your garden exclusively ecologically, blue grain has no place there. Likewise, you should not fertilize with blue grain if children play in the garden or pets have their free run there. In the case of berries, blueberry provides a high yield due to its composition. So if you want to get rich harvest, you are welcome to use this fertilizer. For the growth of plants, blue fertilizer is therefore beneficial and relatively little stresses the values of the soil. If you fertilize too much and too often with blue grain, it may even happen that the soil is completely oversaturated by the potassium and phosphate.

➤ Attention: Do not confuse blue grain with the similar looking slug pellet! Also, never apply blue grain fertilizer in an organic garden.

How to apply fertilizer in the garden with blue grain

blue grain fertilizer dosage for nutrient-rich garden soil

The blue grain granules are applied or ejected by hand. In any case, you should wear gloves when doing this. When fertilizing plants, you should make sure that the soil is as dry as possible. After fertilizing, you must then water the relevant areas well. The same applies to lawns. If you want to fertilize potted plants with blue grit, it is best to use the liquid version or dissolve the granules in water. In addition, blue grain should not get into the hands of children. In addition, make sure that your pets do not drink from the saucers of fertilized plants. Of course, the intensity of dosage depends on the individual needs of the plant (for example, from the growth phases in the spring, fruiting in early summer, etc.). However, as a rule, a thin sprinkling of the beads on the plant floor is sufficient.

gardening in the spring with blue grain fertilizer liquid as a mineral fertilizer for evergreen plants

➤ Tip: If you want to plant fresh plants in the bed in spring or autumn, you can fertilize the soil with blue grain for at least two weeks, or better yet, four weeks. Then you can use the plants after the rest period in the very nutrient-rich soil. However, instead of blue grit, it would be recommended to use horn shavings rather than nutrients in the planting hole.

What plants to fertilize with blue grain?

spreading artificial fertilizer blue grain fertilizer in the garden with rubber gloves

Blue grain fertilizer is particularly suitable for evergreen plants. However, if your garden always appears pale and flowerless, blue grain can counteract this process. The fertilizer contains minerals and trace elements that are absorbed by the plants through the roots. Due to the high concentration of nutrients, you should only use blue grain on open areas. Application for indoor plants is necessary and useful only in exceptional cases, because the high dosage would destroy the delicate roots of potted plants. The industrial fertilizer performs miracles in the garden in terms of growth and robustness. Evergreen plants in particular benefit from the nutrients, which is especially true for the lawn. Evergreens include plant varieties such as rhododendron, boxwood, laurel and taxus.

Treat lawns with blue grain fertilizer in the garden.

garden tips for hobby gardeners blaukorn fertilizer lawn

Meaningful fertilization can be done only when the lawn is completely free of lawn thatch. Lawn thatch is a layer of dead grass blades and other clippings. This layer can be several inches thick and prevents fertilizer from seeping into the soil. Unlike the fertilizer, air and water also cannot penetrate the straw layer. Therefore, it is important to remove the thatch layer. This is done by scarifying. You should perform such a gardening task once a year between March and April. A good scarifier will neatly cut the thatch out of the ground. You should be careful not to attack the turf. You can also easily rent or buy a lawn scarifier at any hardware store.