Carrots can be grown outdoors and in a greenhouse. But in order for the root crop to be sweet, even, and have a lot of carotene and other useful vitamins, you need to know when top dressing is applied, and what fertilizers to choose.
In certain microelements (boron, potassium, phosphorus), carrots especially need, for example, when it is gaining momentum in growth, and when it is necessary to add sweetness to the root crop.
The quality and quantity of the crop also depends on how well weeds, pests, fungi and viruses are controlled. There are a lot of them, so you need to learn how to identify the problem by the first signs.