You wanted to grow purple basil. Instead, you grow green with some splashes of the desired color. Of course, there is a possibility that you mixed up the varieties, planted something wrong. In fact, another situation is possible.
Grade
And this is still one of the versions that the basil variety can be exactly that - with splashes, that is, mixed in color. Varietal variability can also be added to this. This happens, so what you see on the package does not always grow.
Light
If the basil receives insufficient light, it may have a coloring problem. From purple it becomes green. With small doses of light, an active process of chlorophyll production begins instead of the required anthocyanin. It is because of this that the color change occurs.
Soil acidity
If your soil is too acidic, basil can also react. The next time you grow this crop, carry out preventive measures to reduce acidity, then the color of the leaves will be purple.
Also pay attention to the nitrogen content. It can have a negative effect on the plant if there is too much of it. Therefore, green leaves will also appear much more often. If you grow it correctly and monitor the factors that can change the color of basil, then it will grow the desired purple color.