Fertilize thuja emerald - be careful of over-fertilization
You can quickly do too much of a good thing when fertilizing thuja emerald. This is especially true if you rely on mineral fertilizers. These fertilizers quickly become over-fertilized.
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It is better to use organic fertilizers.
Immediately after planting the thuja emerald, you only need to fertilize if you have planted bare-root thuja. Bale goods are adequately supplied with nutrients for the first year.
Suitable fertilizers for thuja emerald
Suitable fertilizers for the tree of life are:
- Coniferous fertilizer
- compost
- Horn shavings
- deposited manure
- Blue grain
- Epsom salt (magnesium deficiency)
- Lime (manganese deficiency)
The best time to fertilize
The first fertilization of Thuja Smaragd takes place in spring. When using slow release fertilizers, a single dose is sufficient.
With short-term fertilizers such as blue grain you can fertilize again until the end of July. Fertilizing is no longer useful later in the year, as the new shoots stimulated by the nutrients no longer harden before winter.
If compost or horn shavings (€ 6.39 at Amazon *) are used as fertilizer, over-fertilization is not possible. These materials slowly release the nutrients.
Be careful when using mineral fertilizers
When fertilizing with mineral fertilizers, you must strictly follow the instructions on the packaging. Thuja emerald as a single tree needs less fertilizer than if you tend the tree of life in the hedge.
Avoid the mineral fertilizer coming into direct contact with the needles, trunk or roots, as this will cause burns. The affected shoots then turn brown and curl.
When does fertilizing with Epsom salt make sense?
Regular fertilizing with Epsom salt is often recommended. This fertilizer is only useful if the Thuja Smaragd suffers from a lack of magnesium. It is expressed by bright yellow needles.
Before giving Epsom salts, have the soil examined in the laboratory. In this way, you can be sure that the needle discoloration was actually caused by a magnesium deficiency and not by fungal diseases or pests.
Fertilize with a mulch blanket
It has proven to be particularly useful to protect Thuja Smaragd in the hedge or as a solitary with a mulch blanket.
The mulch material releases nutrients when it decomposes and at the same time ensures a sufficiently moist soil climate.
Tips
If the needles of the thuja emerald turn black, a lack of manganese is responsible. It occurs in compacted soils that are too damp. By adding lime, the substrate can be improved so that the tree of life can better absorb the manganese from the earth.
