Green collar on tomatoes: causes, solutions and tips for hobby gardeners!

Green collar on tomatoes: causes, solutions and tips for hobby gardeners!

Attention tomato lovers! On the way to juicy, fully ripe fruit, the so-called green collar can become a challenge. These greenish and hard spots at the base of the tomatoes' stems are not only unsightly, they also have an impact on the taste of the fruit. Unfortunately, they often remain tasteless and cannot be ripened. But what exactly causes this green collar and how can you avoid it?

According to the [Wetterauer Zeitung](https://www.wetterauer-zeitung.de/ratgeber/wohnen/ Fehlbildung-wissen-muessen-tomaten-mit-gruenkragen-was-sie-ueber-die-zr-93829911.html), insufficient sunlight, an imbalance in the nutrient supply and choosing the wrong tomato varieties are common causes. High-temperature weather conditions, especially over 30 degrees Celsius, together with strong sunlight, do the rest to promote the physiological disorder. This means that the green collar can be a real nuisance for hobby gardeners.

Causes and prevention of green collars

The green collar problem is not a disease, but a direct response to cultural and weather conditions. Particularly sensitive varieties, such as large-fruited beefsteak tomatoes or dark-fruited varieties, are usually affected. An insufficient supply of nutrients, especially an excess of nitrogen with a simultaneous undersupply of potassium and magnesium, often leads to the undesirable phenomenon. Excessive watering and waterlogging can also aggravate the situation, explains expert Christian Berger from Gartenjournal.

To specifically combat the green collar, hobby gardeners can take simple measures. A warm, sunny location with sufficient air circulation is essential. This also means that the plants receive some shade during hot midday hours to avoid heat build-up. When supplying nutrients, you should aim for a balanced ratio of nitrogen, potassium and magnesium. Watering is particularly crucial - consistent watering, preferably in the morning or evening, is the key to success here.

How to properly handle affected tomatoes

Despite their unsightly appearance, tomatoes with green collars are edible as long as the green areas are removed before consumption. Solanine, which is potentially harmful, is largely broken down in ripe fruits. Nevertheless, the question of enjoyment remains, which is often a concern for passionate gardeners. According to the Bavarian State Institute for Agriculture (LFL), the leaves should not get wet when watering in order to prevent fungal diseases. This benefits the health of the plants and promotes uniform fruit ripening.

In summary, while tomato gardening has its challenges, with a few simple adjustments you can achieve pleasing results. With a good hand in care and consideration of weather conditions, gorgeous and delicious tomatoes are the reward for every garden lover. When choosing a variety, don't forget to choose resistant species so that you can skillfully counteract the green collar!