Oranges originally come from the always humid monsoon areas of Asia, which is why not only consistent water but also a regular supply of nutrients is immensely important. Otherwise, deficiency symptoms such as: E.g. leaves turning yellow or falling off completely.
How and when should you fertilize an orange tree?
In order to optimally fertilize an orange tree, you should apply liquid fertilizer weekly with the irrigation water from mid-March to September. Pay attention to a mixing ratio of 3:1:2 (nitrogen / phosphorus / potassium) for complete fertilizer or 15% nitrogen, 5% phosphorus and 10% potassium for slow-release fertilizer.
Fertilize potted oranges once a week
Start regular fertilizer applications at the beginning of the growing season, i.e. H. from mid to late March. Start slowly and increase the doses. The nutrient supply should take place until September at the most. During the winter break, the orange tree should not be fertilized at all, but should only be watered every now and then.
Why should you stop fertilizing before the winter break?
In the fall, fertilizer should under no circumstances be applied, and watering can also be reduced somewhat. This will slowly prepare the plants for the vegetation break and will not encourage new growth due to a possibly mild autumn. Juicy new shoots that only develop in September do not lignify sufficiently before winter and simply cost the plant too much energy.
Fertilize orange trees – how and with what?
If possible, use a liquid fertilizer (€6.00 on Amazon), which you apply once or twice a week with the irrigation water. Alternatively, you can also use a slow-release fertilizer that releases its nutrients depending on temperature or humidity. A complete fertilizer with trace elements that works for five to six months is recommended here. This fertilizer is easily incorporated into the soil surface.
Make sure the mixing ratio is correct
There are numerous special fertilizers for citrus plants, but it all depends on the content. Therefore, even a normal commercial fertilizer can meet the specific requirements of an orange tree; provided it has the correct mixing ratio:
- Complete fertilizer should have a mixing ratio of nitrogen / phosphorus / potassium in a ratio of approx. 3:1:2
- A nitrogen deficiency is quickly apparent in the fading leaf color.
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Long-term fertilizer should be mixed in a ratio of 15% nitrogen, 5% phosphorus and 10% potassium
- per 10 liters of soil, work a handful (approx. 50 grams) of slow-release fertilizer into the substrate
Orange trees should be fertilized at the latest when the dark green of the leaves slowly begins to turn lighter.
Tips & Tricks
Regular watering is recommended during the growing season. It is best to have a watering can of lime-free water - mixed with fertilizer solution - ready for the plants. Also check the plants regularly for their he alth.
