Reasons for Yellowing Leaves on Nasturtium and How to Fix Them
Illustration of yellowing leaves on nasturtium
The upright stems of nasturtium hold up flowers that look just like upside-down sun umbrellas, and under the sunlight they stand out strikingly among other flowers and plants. Yet this beautiful plant can also develop yellowing leaves when growers fail to care for it properly, so what are the main reasons for yellowing leaves on nasturtium? And when we run into this problem, how should we improve the situation?
I. Common Causes of Yellowing Leaves on Nasturtium
1. Watering
After nasturtium blooms, watering should be reduced to prevent excessive branch growth. If watering is excessive or drainage is poor, the roots are prone to rot from dampness; in mild cases the leaves turn yellow and drop, and in severe cases the whole plant wilts and dies. (If water accumulates in the pot, it will cause the leaves to turn yellow.)
2. Fertilizing
This goes without saying; it is the same for any plant when fertilizer is applied in excess, and it is also fairly easy to judge whether fertilizer was applied recently.
3. Light
This cannot be discussed in terms of light alone; it is better to talk about the seasons. Nasturtium is a perennial plant that fears both cold and heat, and it goes dormant in summer. It can be placed in a cool, ventilated spot, with fertilizing stopped and watering reduced. During the plum rain season, do not let water accumulate in the pot. Doing these things is basically enough to get it through the summer. (Simply put, nasturtium fears heat, and especially in summer it tends to develop yellow leaves, which is also due to the difficulty of getting it through the summer.)
4. Pests and Diseases
If nasturtium is affected by pests such as red spider mites, it will also cause the leaves to turn yellow. The way to judge is to check whether there is webbing on the leaves, or whether there are insects on the underside.
5. Newly Purchased Nasturtium
Many beginner growers buy nasturtium that the seller has just transplanted into fresh potting soil. Without knowing this, the growers place the newly bought nasturtium on a balcony at home, and after exposure to the blazing sun, the plant cannot adapt to the new environment right away and develops yellowing leaves.
Nasturtium
II. Solutions for Yellowing Leaves on Nasturtium
Nasturtium is native to Peru and Chile in South America, as well as Central and South America and other places. It was later introduced into China and is distributed across most of the southern regions, and it is also found in Tibet. If nasturtium leaves turn yellow, it is very likely that the climate or growing environment provided is not good enough, or that too much or too little fertilizer was applied, or that it is due to pest damage. To know what to do about yellowing nasturtium leaves, we first need to understand where the root of the yellowing lies.
If the yellowing is caused by too much or too little watering, then pay attention: after nasturtium blooms, water it less, and make sure the drainage of the pot and soil is good. Before flowering, always follow the principle of not watering until the soil is dry, and watering thoroughly when you do.
Summer is the dormant period for nasturtium, and during this time you must never water or fertilize excessively, as this can easily cause the leaves to turn yellow. Simply place the potted plant in a cool, dry, ventilated place, and a very important point is not to let water accumulate in the pot. Summer is the period when nasturtium leaves yellow most intensively.
Observe your nasturtium carefully. If there is webbing on the leaves, or insects hiding on the inner leaves of the plant, then the yellowing leaves are certainly caused by pests and diseases, and in severe cases they can cause all the leaves to wither and die. July to September is a season with a very high outbreak rate of pests and diseases. At this time we should prune off the branches threatened by pests and diseases and dispose of them cleanly. Insecticide can also be used, sprayed 3-4 times a day, until the leaves turn green again.
A newly purchased nasturtium should be placed in a cool, ventilated spot to let it slowly adapt to the new growing environment, and yellowing leaves on a newly purchased nasturtium are also a perfectly normal phenomenon. As long as it is not grown under strong sunlight, there is no need to worry too much.
Why Are Nasturtium Leaves Turning Yellow? What to Do About Yellowing Nasturtium Leaves
It likes a mild climate and cannot tolerate severe cold or intense heat. The suitable growing temperature is 18 to 24 degrees Celsius. It can endure short periods at 0°C, prefers warmth and humidity, and its overwintering temperature should be above 10°C. As the stems and vines grow, bamboo strips should be used in time to set up supports and tie the branches and vines. So why are nasturtium leaves turning yellow? And what should be done about yellowing nasturtium leaves? Below, the wed114 wedding website brings you the detailed content.
Why Are Nasturtium Leaves Turning Yellow
1. Too much water
After nasturtium blooms, watering should be reduced to prevent excessive branch growth. If watering is excessive or drainage is poor, the roots are prone to rot from dampness; in mild cases the leaves turn yellow and drop, and in severe cases the whole plant wilts and dies. If water accumulates in the pot, it will cause the leaves to turn yellow. Nasturtium can be watered frequently, but each watering should be relatively small, to avoid the water evaporation rate failing to keep up with your watering rate.
2. Excessive fertilizing
When fertilizing nasturtium, the concentration must not be too high, and the amount of fertilizer must not be too much, otherwise it is easy to burn the roots. Once the root system is damaged, the leaves are naturally damaged as well. For nasturtium fertilizer, natural fertilizer can be used, and chicken, duck, or goose manure water is best. If you do not have that, you can dilute a special flower fertilizer when applying it.
3. Light too strong
The temperature and light of spring, autumn, and winter are no problem for nasturtium, but the light in summer is somewhat too strong. Nasturtium is a herbaceous plant that fears heat; when the light is too strong and the temperature too high, it goes dormant and the leaves show signs of withering and yellowing. Therefore, in summer, nasturtium should be given appropriate shading.
4. Pests and diseases
Common pests of nasturtium include red spider mites and leaf miners. If there is pest damage, after the leaves are harmed, they show signs of yellowing. Check carefully whether there is webbing on the leaves and whether there are insect eggs, and observe the underside of the leaves especially carefully. Once discovered, kill them immediately and cut off the diseased leaves and burn them.
Generally speaking, the reasons for yellowing nasturtium leaves are many-sided; water, fertilizer, light, and pests can all be causes, so when growers read articles, they should judge the cause of their own nasturtium's yellowing leaves according to their actual situation.
What to Do About Yellowing Nasturtium Leaves
If the yellowing is caused by too much or too little watering, then pay attention: after nasturtium blooms, water it less, and make sure the drainage of the pot and soil is good. Before flowering, always follow the principle of not watering until the soil is dry, and watering thoroughly when you do. The editor's flowers, for example, grew wildly branching because of excessive watering; although the leaves did not turn yellow, it was especially unattractive.
Summer is the dormant period for nasturtium, and during this time you must never water or fertilize excessively, as this can easily cause the leaves to turn yellow. Simply place the potted plant in a cool, dry, ventilated place, and a very important point is not to let water accumulate in the pot. Summer is the period when nasturtium leaves yellow most intensively.
Observe your nasturtium carefully. If there is webbing on the leaves, or insects hiding on the inner leaves of the plant, then the yellowing leaves are certainly caused by pests and diseases, and in severe cases they can cause all the leaves to wither and die. July to September is a season with a very high outbreak rate of pests and diseases. At this time we should prune off the branches threatened by pests and diseases and dispose of them cleanly. Insecticide can also be used, sprayed 3—4 times a day, until the leaves turn green again.
Nasturtium flower meaning:
One flower meaning of nasturtium is that love is everywhere, it is just that your heart is absent. This tells us that in life we should be good at discovering love and loving with our hearts, for love, this beautiful thing, is everywhere, haha. There is another saying about the nasturtium flower meaning: something that cannot be sought but may come by chance, just be happy. In fact, flower meanings very often teach us how to live and how to face life. The nasturtium flower meaning also includes the idea of patriotism.
What is going on with yellowing nasturtium leaves? What should be done about yellowing nasturtium leaves?
Nasturtium is a plant of the family Tropaeolaceae and the genus Tropaeolum, a perennial semi-trailing or prostrate plant. The plant height is 30 cm-70 cm. The basal leaves have long petioles, and the leaf blades are pentagonal, divided into three parts, with the secondary segments having a few small lobes and sharp teeth. The flowers are solitary or 2-3 in cymes, with five petals, 8-19 sepals, yellow, elliptical-obovate or obovate, and the petals are the same length as the sepals, narrowly linear. Previously, some growers encountered the phenomenon of yellowing nasturtium leaves. Generally speaking, the reasons for yellowing nasturtium leaves are many-sided; water, fertilizer, light, and pests can all be causes. Below, this article focuses on introducing the reasons for yellowing nasturtium leaves and the solutions, for everyone's reference and learning.I. Yellowing Leaves on Nasturtium
1. Improper watering. Although it is named nasturtium, which is relative to the lotus, it is not a plant that likes drought. Watering needs to alternate between dry and wet; do not water while the surface soil is still dry, and when it is dry, be sure to water thoroughly. In addition, after nasturtium blooms, watering should be reduced to prevent excessive branch growth. If watering is excessive or drainage is poor, the roots are prone to rot from dampness; in mild cases the leaves turn yellow and drop, and in severe cases the whole plant wilts and dies. (If water accumulates in the pot, it will cause the leaves to turn yellow.)
2. Temperature too low. The temperature is best kept above 10°C, and the lower the temperature, the more the watering frequency should be controlled. Also prevent cold winds and the dry, hot air from heating or air conditioning from blowing on it, otherwise it is very easy to cause the leaves to become chlorotic.
2. Excessive fertilizing. Although fertilizer needs to be applied during the growing process, excessive fertilizer will cause fertilizer damage. Especially when pouring fertilizer solution, prevent the fertilizer solution from splashing onto the leaves.
3. Light. This cannot be discussed in terms of light alone; it is better to talk about the seasons. Nasturtium is a perennial plant that fears both cold and heat, and it goes dormant in summer. It can be placed in a cool, ventilated spot, with fertilizing stopped and watering reduced. During the plum rain season, do not let water accumulate in the pot. Doing these things is basically enough to get it through the summer. (Simply put, nasturtium fears heat, and especially in summer it tends to develop yellow leaves, which is also due to the difficulty of getting it through the summer.)
4. Pests and diseases. Red spider mite damage: when the air is dry, it is prone to this pest damage. The control method is to increase humidity, and a miticide specifically for mites can also be sprayed.
II. Key Maintenance Points and Solutions
To grow potted nasturtium well, first choose a reasonably formulated growing soil; second, strengthen fertilizer and water management during the growing period; third, ensure relatively sufficient sunlight.
① For the growing soil, it is best to choose a loamy soil mixed from 4 parts leaf mold, 4 parts garden soil, 1 part compost soil, and 1 part sandy soil.
② During the growing period, nasturtium often shows long internodes and yellow leaves, thin stems and small leaves, or luxuriant branches and leaves but sparse flowers due to improper fertilizer and water management. During the growing process, generally apply 20% concentration fermented soybean cake water once a month; during the flowering period, stop applying nitrogen fertilizer and instead apply 0.5% superphosphate or fermented chicken and duck manure water once every half month; after the flowers fade, apply one topdressing of 30% fermented soybean cake water to supplement the nutrients consumed by flowering. In summer, when the weather is hot, stop fertilizing. At the end of autumn, apply one more compound overwintering fertilizer to enhance the plant's cold resistance. Watering is a routine management task, and the watering frequency and amount should be determined according to the weather and the plant's growth. In spring and autumn, generally water once every other day, and in summer water once a day, to maintain relatively high air humidity. When flower buds appear, the watering frequency should be appropriately reduced, but the amount of each watering should be increased, so that the potting soil alternates between dry and wet. After flowering, watering should be reduced.
③ Nasturtium likes sunlight. In spring and autumn it should be placed in a spot with sufficient sunlight, in summer it needs appropriate shading, and in winter keep the room temperature at around 15°C with sufficient sunlight, and it can continue to grow and develop.
Summary: The above is an introduction to knowledge about yellowing nasturtium leaves. We hope everyone will exchange their experience in caring for nasturtium.