With spring, nature awakens to new life. For gardeners and farmers, the important time of soil preparation and fertilization begins to optimally supply their plants. A particularly effective fertilizer for spring is iron(II) sulfate, also known as ferrous sulfate II. In this blog post, you will learn how to properly use iron(II) sulfate to get your garden or fields ready for spring.

The importance of iron for plants

Iron is an essential trace element for plants. It plays a crucial role in chlorophyll formation and thus photosynthesis. Without enough iron, plants cannot optimally form the pigment chlorophyll, which leads to deficiency symptoms such as chlorosis (yellowing) of the leaves.

Furthermore, iron is involved in many important metabolic processes, such as respiration and protein formation. Thus, sufficient iron supply is essential for healthy growth and good vitality of plants.

When should iron(II) sulfate be applied?

Iron(II) sulfate is excellent as a spring fertilizer. From March to May, the plants' iron demand is particularly high because new growth begins during this time and many metabolic processes are intensified.

By using iron(II) sulfate, you can give your plants an optimal start to the growth phase. The fertilizer specifically supplies them with the important trace element and prevents deficiency symptoms. The use of iron(II) sulfate is especially recommended for:

• Lawn: An iron fertilizer in spring promotes an intense green color and strong growth of the lawn.
• Fruit and vegetable plants: From strawberries to tomatoes to cruciferous vegetables, many crops benefit from targeted iron fertilization.
• Ornamental plants: Flowers and shrubs such as roses, hydrangeas, or azaleas also need iron for their optimal growth.

How is iron(II) sulfate applied?

Iron(II) sulfate can be used in many ways in the garden or field. The most common methods are:

Soil application

A classic method is to work iron(II) sulfate directly into the soil. For this, evenly spread the fertilizer over the area and then lightly rake it in. This allows the iron to quickly reach the root zone of the plants.

Recommended application rate: 20-50 g iron(II) sulfate per m² of soil surface.

Spray application

Alternatively, you can use iron(II) sulfate as a foliar fertilizer. To do this, dissolve the fertilizer in water and spray the solution directly onto the leaves of the plants. This way, the leaves quickly absorb the iron through the stomata.

Recommended application rate: 10-20 g iron(II) sulfate per 10 liters of water.

Watering application

Another option is to water a solution of iron(II) sulfate directly to the roots of the plants. This also allows the fertilizer to quickly reach the root zone.

Recommended application rate: 10-20 g iron(II) sulfate per 10 liters of water.

Composting

Iron(II) sulfate can also be incorporated into the compost. As the organic material decomposes, the iron is gradually released and becomes available to the plants.

Recommended application rate: 50-100 g iron(II) sulfate per m³ of compost.

Tips for using iron(II) sulfate

• It is best to apply iron(II) sulfate in early spring when plants have the highest demand.
• Follow the recommended application rates to avoid overdosing.
• Make sure to distribute the fertilizer evenly over the area.
• Combine the use of iron(II) sulfate with other organic or mineral fertilizers to comprehensively supply your plants.
• Observe the development of your plants closely after fertilizing and adjust the amount if necessary.

With iron(II) sulfate as an effective spring fertilizer, you lay the foundation for healthy plant growth and a bountiful harvest. Try it out and see the benefits for yourself!