Often, at markets or fruit and vegetable stores, we rush to buy the “first” strawberries or the so-called “first” peaches that appear on the shelves. The old saying goes that every vegetable should be used (consumed) in its time. This usually means that we do not buy fruits and vegetables even though it seems tempting on store shelves if we know what season it is growing and when it is harvest time. Chemical substances and nitrates are found in cultivated soil and fertilizer for growing vegetables. Their amount is usually higher in vegetables grown in greenhouses and greenhouses to achieve year-round harvesting and faster growth. Vegetables grown in open gardens, vegetable gardens and land have fewer fertilizers and negative nitrates than vegetables grown indoors and in glass gardens (for accelerated vegetable growing). When using vegetables harvested immediately after growing, various allergies, itching and swollen eyelids can occur (due to the increased acetylsalicylic acid in the vegetables). Vegetables harvested and used “ahead of time” are a great burden for the body of a healthy person and especially people with allergies. We do not know enough about the gardener’s label on vegetables or the “type of chemical substance” used to treat certain vegetables for faster growing in glass gardens. If we still want to buy vegetables like this, we should do it with a trusted gardener / trader to avoid unnecessary adverse reactions of the organism to a particular type of vegetable. We all know enough of the climate we live in and the climatic conditions that surround us. We also know laymen what kinds of vegetables ripen at what time of year. We should therefore choose a certain type of vegetable characteristic of a particular time of year. For example, green vegetables in this part of Europe (in the Balkans) can be harvested during spring (spinach, lettuce, kale, cauliflower, etc.). Here, in September, it ripens yellow vegetables such as corn, pumpkins, watermelons, melons, etc.