The Nordmann fir needs that
The Nordmann fir does not have high nutritional requirements. In this way, a full-grown tree will usually be able to get by with the resources of the soil. Nutrients may only need to be added if this is lean or if the fir is in the bucket. Even newly planted or transplanted Specimens get off to a better start with fertilization.
also read
- Nordmann fir - what turns green needles brown
- Nordmann fir - possible growth per year
- Nordmann fir - how to plant it correctly
A commercially available NPK fertilizer with the elements sodium, phosphate and potassium is inadequate for the Nordmann fir in the long term. Deficiency symptoms can occur, such as the dreaded one Needle tan. Special pine fertilizers therefore offer an expanded nutrient composition, primarily with iron, magnesium and sulfur.
Time and dosage
Nordmann firs are fertilized during their growth phase from February to August.
- Apply pine fertilizer every 6 to 8 weeks
- 70 to 140 grams per square meter (depending on the size of the tree)
- Distribute around the root area and work in flat
- alternatively Slow release fertilizer use for conifers
Tips
Pay attention to the Fertilize der Nordmann fir on the manufacturer's dosage instructions and do not exceed them. A fir tree can also be over-fertilized.
Epsom salt for green needles
The pine fertilizer not only ensures a green coloration of the needle dress, but also a quick one Growth. If you consider that a Nordmann fir can grow up to 25 m high, this may not be so desirable in a home garden. Epsom salt, which is otherwise used as an additional fertilizer against brown needles, can be avoided here.
Epsom salt is a highly concentrated magnesium sulfate fertilizer. It is available as a liquid fertilizer or dry preparation, in which the accompanying extensive watering must not be forgotten. Use Epsom salts sparingly and always according to the manufacturer's instructions. The needles stay green and growth is slowed down.
Soil analysis provides reliable data
The appearance of brown needles should not be interpreted as a sure sign of deficiency. Only one can determine whether a soil is poor in nutrients Soil analysis reliably determine. The new needle color can also be caused by moisture, drought, soil compaction or pests.