Yesterday it was he althy and green, today it turned yellow. Yellowed dahlia leaves raise questions. What's behind it and how can the dahlias be revitalized again?
Why do dahlias have yellow leaves?
Yellow dahlia leaves are often due tonutrient deficiencies. But there can also be many other causes such asdiseases,pest infestation, too dark alocationand too muchMoistureIn any case, there is a need for action. Examine the leaves and reconsider care.
Do dahlias suffer from a nutrient deficiency?
Themost common causefor yellow dahlia leaves is anutrient deficiency. It is the so-called chlorosis. It is caused by a deficiency of magnesium, potassium, calcium, manganese, iron and/or zinc. How to recognize a defect:
- Magnesium deficiency: pale yellow leaves with dark green leaf veins
- Potassium deficiency: yellow leaf edges
- Calcium deficiency: yellow-green and deformed leaves
- Manganese deficiency: yellow leaves with small brown spots in the middle of the leaf
- Iron deficiency: yellow leaves with brown spots and reddish discoloration
- Zinc deficiency: yellow spotted leaves
What can I do if dahlias have a nutrient deficiency?
If the yellow leaf symptoms indicate a nutrient deficiency, you shouldfertilize the affected dahlias Horn shavings are well suited. If the dahlias suffer from a calcium deficiency, it helps to give them lime. Make sure to fertilize them regularly. This is especially true for dahlias that are grown in pots. Ideally, these should be supplied with a flowering plant fertilizer.
Can diseases cause dahlia leaves to turn yellow?
Diseasescan cause the leaves of dahlias to turn yellow. For example, a virus can be the cause. The flowers often turn brown. In addition to a virus, leaf spot disease can also be responsible for yellow leaves. The lower leaves turn yellow first. This plant disease can be stopped by removing the diseased leaves.
Should yellow leaves be removed from dahlias?
Yellow leaves on dahlias should beremoved to be on the safe side. Take the appropriate leaves and cut them off. This is also recommended for visual reasons.
What pests can cause yellow leaves on dahlias?
Various pests such asslugsandaphids can cause yellow dahlia leaves. Snail damage and aphid infestation limit the dahlia's nutrient supply, which can lead to yellowing.
Can wetness cause dahlia leaves to turn yellow?
Wetnesscan cause yellowingof the dahlia leavesDahlias do not tolerate moisture. The tubers rot in the soil and the supply of nutrients is hindered. Dahlias, on the other hand, tolerate drought better. Therefore, make sure that you water your dahlias regularly, but not too much.
To what extent does the location of dahlias contribute to leaf color?
If the location istoo dark,the leaves of the dahlias will turn yellow. These plants need lots of sunlight to stay he althy and grow well. In addition, the soil at the location should be slightly acidic.
Tip
Prevent yellowing of leaves
To keep diseases and pests away from dahlias, proper care is important. Fertilize these plants regularly, but not too much. Cut off old plant parts and do not water on the leaves.
