Fruit and Vegetables

Curled tomato leaves in violet at the edges

Question: curled violet-colored tomato leaves at the edges

Hello everyone, I wanted to talk to you about my problem with tomato leaves.
First of all I wanted to tell you that it is my first year that I am starting to do a little garden, so practically after a night of intense rain I decided not to give water to tomatoes for two days, and on the second day, in the evening , (but already the day after) I noticed that some plants had their leaves curled upwards and their edges were violet, others even seemed to be dry at the tip ... I also see that they find it hard to grow compared to other neighboring plants, I don't know what it could be me, meanwhile, last night I gave all the plants green copper, I hadn't given them for about 3 weeks, can you help me? Thanks Davide

Curled tomato leaves of violet color at the edges: Answer: curled tomato leaves of violet color at the edges

Dear Davide,
usually when the tomato plants begin to curl, they are simply not getting enough watering; the tomatoes, among the various plants of the garden, are not greedy of water, but at the same time, especially in summer with a dry climate, sun and heat, they must be watered regularly. Avoid watering them every day, and above all avoid very shallow watering, which tends to favor the development of a very superficial root system, which will suffer more from heat, cold, drought, excess water. Rather than watering every day, supply the water every two or three days, but wetting the soil well in depth, and in this way favoring the development of a slightly deeper root system. Above all, when watering tomatoes (but also for zucchini, peppers, aubergines) it avoids wetting the foliage, because the water on the leaves, especially in the evening, can favor the development of oidium and other fungal diseases. Even after a rain, before deciding to suspend the watering for two whole days (in summer), check how wet the soil is; this is because the rains, if they are not very intense, only dampen the soil in the superficial part, and therefore the plants, after a few hours from the rain, still need to be watered.
Surely this state of stress can cause a greater propensity to fungal diseases, because plants that suffer water stress tend to be more defenseless against parasites; It was therefore an excellent idea to treat the plants with verdigris, to prevent the presence of any fungal parasite. The fact that some plants in your garden are slower to develop and tend to be more "delicate" may be due to various reasons; for example a different exposure, even light, or a less rich soil, or smaller amounts of fertilizer at the time of implantation. Or again, as often happens in the garden of my father, plants of different quality, or purchased in another shop, which may be less vigorous than the other plants in the garden.
In addition to these listed, the reasons may be various; sometimes then we forget a simple good rule in the vegetable garden, or rotation: every type of plant that you plant in the garden has different nutritional needs; for example courgettes use much of the nitrogen present in the soil, while tomatoes usually absorb a lot of calcium (much in relation to other plants, not in absolute terms); if for several years we always place the tomatoes in the same flowerbed, we will find ourselves having to supply calcium with the fertilizer, or our plants will grow stunted, or will produce fruits with various types of dents. Perhaps the plants that are developing worse have been placed in a flowerbed that also the other years was cultivated tomatoes, while the others, the more luxuriant ones, are not.