When, with what and how often?

Fertilize oleanders during the growing season

During the winter months, the oleander must be watered, but not fertilized: The evergreen plant needs a break in the cold season and should therefore Wintered as cool as possible will. Start the regular fertilization at the beginning of the growing season in March and continue it until the middle, but no later than the end of August. Thereafter, the oleander should no longer be supplied with nutrients so that the shoots from Being able to mature in time for the winter break - this only allows up to minus five degrees Celsius hardy plant some protection from cold temperatures. After all, oleanders should be moved to their winter quarters as late as possible.

Potash fertilizers and lime are also good for oleanders

You can also increase winter hardiness by providing the oleander with potash fertilizer between mid-August and the end of August. This supports the shoots in the timely ripening, but must not be used later than specified. Otherwise it can no longer develop its effectiveness. In spring, too, an additional dose of potash fertilizer and fertilizer lime at the beginning of the growing season makes sense, especially if you are using it

Slow release fertilizer fertilize.

Which fertilizer is suitable for oleanders?

Oleander can be effectively supplied with a variety of fertilizers and tolerates both mineral and organic substances very well.

For the forgetful: long-term fertilizer lasts a long time

If you are forgetful or just want to be on the safe side, you can provide your oleander with a slow-release fertilizer for flowering plants at the beginning of the growing season. Various remedies are available on the market that cover three, four, six or even twelve months. Fertilize the oleander at the beginning of the season and work the fertilizer carefully into the substrate. You then have rest for the specified period of time, and over-fertilization is difficult due to the very slowly released nutrients. Even after or when repotting the oleander should be provided with a slow release fertilizer.

Weekly flowering plant or oleander fertilizer

Alternatively, of course, fertilization with a mineral flowering plant or a special one is also possible Oleander fertilizer is possible, but - depending on the agent used - carried out once or twice a week should be. It is best to use a liquid fertilizer that you can administer together with the irrigation water. This has the advantage that it can reach the roots faster and be better absorbed.

Oleander tolerates organic fertilizers very well

If you like it more natural, you can of course also use natural fertilizers such as compost, manure and Horn shavings(€ 32.93 at Amazon *) To fall back on. These fertilizers also release their nutrients very slowly, so that over-fertilization is practically impossible. Provide your oleander with organic fertilizer in early spring and early summer, which is thoroughly worked into the substrate. The plant substrate can also be repotted with compost and Horn shavings(€ 32.93 at Amazon *) be enriched.

Extra tip: fertilize the oleander with tea or coffee grounds

A very special as well as particularly cheap insider tip for fertilizing strongly consuming plants such as oleander is the use of tea or coffee grounds. Coffee grounds in particular contain a great number of valuable nutrients and are valuable fertilizers, which are also obtained free of charge in many households - and are usually thrown away. You can use coffee grounds fresh, but you can also dry them and then store them in an airtight container for the next use.

Fertilize oleander with blue grain

Fertilization with blue grain is also possible with oleander, many hobby gardeners have had very good experiences with it. However, the very nitrogen-containing blue grain can quickly become over-fertilized, which stimulates the shoot growth immensely, but hardly any flowers - too much nitrogen in the fertilizer is poison for a rich bloom. Correctly dosed (be sure to follow the instructions!), However, you can't go wrong with Blaukorn. If you want to be on the safe side, you can also fertilize your oleander with compost at the beginning of the growing season - this ensures a balanced mineral balance.

Recognize nutrient deficiency in good time

Are sure signs of insufficient fertilization especially yellow leaves - especially if the oleander not only has occasional yellow leaves, but a large number of leaves turn yellow within a short period of time. Isolated yellow leaves are normal, however, as this is a natural aging of the foliage. Even a measly flower or Stunted flowers can indicate a nutritional deficiency, and these often occur in combination with fungal or bacterial diseases on.