How to grow your basil
Warmth
Sweet basil grows well in a warm environment, with the optimum temperature being 22 to 30 degrees Celsius and it does not like cold climates.
Plenty of light
Sweet basil also likes light in order to grow well. If it is too dark, sweet basil will not grow healthy.
When growing it indoors, keep it as close as possible to the fluorescent lights in the room or place the container closer to a desk light.
CO2
The CO2 concentration inside the ISS is higher than on the ground. However, it may be difficult for you to produce the same CO2 concentration like the one on the ISS so JAXA does not recommend anything about maintaining the same the CO2 levels.
Basil is a very popular plant and even though is mostly associated with Mediterranean cuisine, it is likely originated from India. Sweet basil is an annual herb of the mint family (Lamiaceae). Other famous plants in the same family are lavender and rosemary, thyme and even the famous catnip. (Encyclopaedia Britannica, 2021).
