Indication of nutrient deficiency
If the leaves on plants - not only on geraniums - gradually turn yellow, this is often a sign of nutrient deficiency; especially if the leaf veins themselves remain green. This nutritional deficiency occurs not only when you fertilize too little, but also when you use an unsuitable fertilizer. Each plant species has its own specific nutritional requirements, which not only relates to the frequency of fertilization, but also to the composition of the fertilizer. For example, yellow leaves on geraniums are often an indication of a deficiency in the trace element iron.
also read
- Geraniums overwinter even without a cellar
- What you can do about common geranium diseases
- Wintering geraniums without soil
What to do about yellow leaves
Fortunately, the ugly yellow leaves of your geraniums are now quite easy to treat. As an effective first aid measure, we recommend a quick first aid with a special iron fertilizer, which is dissolved in the irrigation water and administered together with it as a solution. Be careful when handling iron fertilizer, however, as the agent is poisonous.
Fertilize geraniums properly
As is often the case, prevention is better than treatment, which is why you should feed your geraniums regularly and with the right fertilizer. The flowers are extremely heavy consumers and should be looked after at least once a week. Suitable fertilizers are mainly:
- special geranium fertilizer
- Flowering plant fertilizer
- Blue grain
- Coffee grounds
Be careful not to fertilize on dry substrate. Instead, you can apply the fertilizer together with the irrigation water.
Tips
Since a lack of nutrients weakens the plant, as a result more pests settle - whiteflies in particular target geraniums that have been maltreated in this way. These should also be combated in good time.
