Why do the leaves turn yellow and dry in tomatoes
When your favorite seedlings are sick, I want to immediately find out the reasons to save the crop. Maybe something is wrong with the care, lacking fertilizer, the garden was attacked by pests or the tomatoes get sick? We specifically examined in detail the possible options. We share the reasons why the leaves of the tomatoes turn yellow!
The most common causes are obvious and commonplace: lack of sun, water or nutrients. Such problems are fairly easy to correct, and the seedlings themselves will return to normal. But at the same time, yellowness can be a disturbing symptom of various diseases or fungus. More radical actions are already needed here.
Sometimes yellowing is a natural process that indicates the adaptation of the plant to the conditions around. It may indicate problems with the absorption and transfer of minerals. In any case, it is better to wait a couple of days first - perhaps the problem will disappear on its own. Most importantly, watch for the absence of other symptoms!
The lower leaves of tomatoes turn yellow
For adult plants, yellowness from below is a normal biological course of events, because they develop and age. Tomatoes dump "ballast" in order to concentrate resources on the development of young shoots and the formation of fruits. In the absence of any other symptoms and good condition, nothing needs to be done.
Sometimes the lower leaves wither away immediately after transplanting - this is a natural reaction of the sprouts to stress. You need to maintain the health of the top, and the rest of the seedlings will cope on their own. When the leaves from below finally die off - just remove them as soon as possible so as not to create favorable conditions for diseases.
Top leaves of tomatoes turn yellow
When the first thing the young shoots are yellowed from above is they lack nutrients. Useful minerals simply do not reach them, so it's time to fertilize or spray.
- If yellow spots appear along the veins or in the middle of the plates, there is little iron. After top dressing with 1% chelate or vitriol, the problem disappears in a couple of days. Do not use salts only, because phosphorus absorption is impaired because of them;
- With a deficiency of calcium, the leaves begin to change from the very tips. The second indirect sign is if the flowers begin to fly around. And when the tomatoes are already bearing fruit, dark spots appear on them, which quickly increase;
- When the base of the leaves is deformed, and not as usual - the edges, and then change color - you need a weak solution of boric acid. Lack of boron in the future may lead to the death of the ovaries and the deterioration of the taste of the crop;
- Red veins on yellow plates and weak lignified shoots are symptoms of sulfur deficiency. In this case, magnesium sulfate is best suited;
- Fading uneven spots along the plates turning yellow and yielding are an excuse to conduct potassium permanganate treatment. It is also a good antiseptic that prevents the development of fungal diseases. Change the concentration from 1 to 3 g, depending on the intensity of the problem.
Tomato leaves turn yellow and curl.
Deformation and yellowing of the leaves is a dangerous sign that usually indicates more serious problems. At best, this is an uneven growth due to lack of lighting or a serious fertilizer shortage. But often the reason is that mites or aphids are hidden on the back of the plates. In the worst case, parasites eat up the roots.
Tomato leaves turn yellow and wilt
Yellowness and wilting of leaves most likely indicate an excess of moisture at the same time as low temperature. Reduce watering, use warm water and build shelter. Check the feeding schedule to see if the seedlings have enough nitrogen and other nutrients. Watch that wilting begin gradually and from the edges, otherwise this is a likely symptom of the fungus.
Tomato leaves turn yellow after planting
Planting is always stress for seedlings, and it affects well-being and appearance. Adaptation is a normal feature of the life cycle that is not unique to plants. But if the situation has not stabilized by itself in the near future, the reasons may lie deeper.
- The fungus or the larvae of pests that young seedlings now eat can remain in the ground;
- When transplanting, it is especially easy to damage the delicate root system. If the damage is minor, the plants will return to normal themselves;
- Sprouts respond most quickly to improper watering, so keep an eye on the moisture level of the substrate;
- If it turns out that the street is still too cold, the tender young foliage of the seedlings will turn yellow. Wait for stable warming, because the rush to transplant is fraught with damage to the crop. It may even be June in the northern regions.
Tomato leaves turn yellow in open ground
Seedlings in an open area are much more exposed to any external influences. These are winds, rains, the scorching sun, insects and pests - which means that it is important to quickly identify the source of the problem.
- During drought and heat, the leaves of the tomatoes dry out due to lack of moisture, so increase the frequency of watering;
- If it gets colder on the street and rains for a long time, probably there is too much moisture, so come up with shelter;
- Tomatoes often turn yellow due to unexpected frosts, because this is their natural reaction to hypothermia;
- The leaves turn yellow if you accidentally damage the rhizome during excavation. Then the plant is focused on restoration and directs less nutrients to the ground part. This is a normal process, so just watch;
- When the soil lacks nitrogen and potassium, the leaves grow weaker, grow smaller, deform, and turn yellow. This is a sure signal to carry out unplanned top dressing;
- Tomatoes are sick, like any other plants. Blots from late blight or mosaic are usually irregular, unsystematic and chaotic. They are rapidly spreading, changing color and texture, can swell or dry out. Not all diseases are treated, and you need to immediately isolate the damaged bushes, without waiting for the spread.
Tomato leaves turn yellow in a greenhouse
It seems that already in the greenhouse are precisely the ideal conditions for the tomato seedlings to feel good. However, plants are a living organism, therefore, a universal panacea for all ills does not exist.
- If the leaves of the tomatoes not only turn yellow, but also rot, then the humidity in the greenhouse is too high. Lower it to about 65% and make sure that it is not cold. Be sure to set and track the readings of thermometers and sensors;
- For seedlings equally infrequent and too frequent watering is fatal. If the yellow leaves dry out - they have little moisture, and if they soften - you need to dry the soil and reduce watering;
- Always use nitrogen during intensive green mass gain. Bring it in gradually, but in several passes, so as not to burn the roots and not spoil the soil. Leaves that lack strength and minerals will quickly restore color. We recommend combining nitrogen with ash - it is rich in potassium and prevents acidification;
- If everything is in order with the care, but the leaves of the tomatoes still turn yellow, the root system may be damaged. These are not necessarily pests: maybe someone accidentally damaged the root with a shovel. If the problem is purely mechanical, the plants will recover themselves when they regain strength;
- In case of diseases, other symptoms also appear: yellow spots turn into dark ones, and plates and shoots are bent. The development of viruses exacerbates the heat, an excess of nitrogen and moisture, improper herding.
Leaves turn yellow at tomato seedlings on the balcony
Young tomato seedlings are very vulnerable to all external factors, so even on the balcony it is difficult to guarantee ideal conditions. And there are several specific problems.
- The situation with a lack or excess of moisture remains the same, so watch for the condition of the substrate, and not for the theoretical schedule;
- For the development of young seedlings you need warmth, and if the temperature drops below 18 degrees, it will turn yellow;
- When the seedlings only hatch and gain leafy mass, they need nitrogen in the soil;
- The soil in containers may be too acidic, especially after adding nitrogen fertilizers. Always balance the situation and bring in some wood ash;
- The green pigment directly depends on photosynthesis, and photosynthesis on the amount of light. Tomato seedlings need more sun throughout the day;
- Direct sunlight in hot midday can cause burns. Take care of partial shade on hot days in advance, because they come unexpectedly;
- Seedlings grow rapidly and fill the container, and at first the root system develops more actively than the ground part. If the tomatoes suddenly stopped growing and began to turn yellow - they do not have enough space in the box.