Reasons and Solutions for Yellowing Leaves on Nasturtium
Nasturtium is a flowering plant with fairly high ornamental value. It is also a relatively popular flower in China, and nasturtium is now grown on a fairly large area. However, when growing nasturtium, problems often arise that reduce its ornamental value. One of these is yellowing leaves on nasturtium. So what exactly causes yellowing leaves on nasturtium? Let's take a look below!
1. Too much water
As its name suggests, nasturtium does not have high water requirements. Especially after nasturtium blooms, be sure to reduce watering; if you water too much, the branches of nasturtium are prone to leggy growth. And if the water is not drained in time, or if drainage and irrigation are poor, the roots are easily rotted, causing yellow leaves in mild cases and plant death in severe cases. So when planting, we should not only pay attention to controlling watering, but also pay attention to the soil's drainage and irrigation capacity, and drain standing water promptly to avoid affecting the growth of nasturtium.
2. Excessive fertilization
Although nasturtium needs appropriate fertilization as it grows, when fertilizing, be sure to control the concentration and amount of fertilizer. It must not be too concentrated or too much, otherwise the roots of nasturtium are very easily burned by the fertilizer. After the roots are burned, the absorption of nutrients and water is blocked; without sufficient nutrients, the leaves of nasturtium will naturally be affected. When fertilizing, you can choose natural fertilizer, but do not apply too much; just meet the nutritional needs of nasturtium for growth. You can also apply a diluted special fertilizer for flowers as a top dressing.
3. Too much light
Light also has a relatively large effect on the growth of nasturtium. When growing nasturtium, we should reasonably adjust light and temperature according to seasonal changes. In the three seasons other than summer, the light is very friendly to nasturtium. But summer light is very strong, and if shade is not provided in time, the leaves may suffer sunscald. Moreover, if temperature and light exceed what nasturtium can tolerate, the leaves will gradually go dormant, resulting in a withered and yellow appearance. Therefore, in summer, be sure to do a good job of shading nasturtium.
4. Pests and diseases
Pests and diseases are also a main cause of yellowing leaves on nasturtium. Among them, pest damage is the most serious, such as red spiders and leaf miners. These pests all harm nasturtium, sucking up the nutrients it needs for growth. This causes many wounds on the leaves, reduces photosynthetic capacity, and leads to insufficient nutrition, which in turn causes the leaves to turn yellow. So when planting, be sure to frequently check the growth of nasturtium. If you find insect eggs or similar problems, cut off the affected leaf, take it out of the field and burn it, then properly spray insecticide around the plant for disinfection.
The above is a brief introduction to what causes yellowing leaves on nasturtium. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!