Watering:
Water on a regular basis, especially if the weather is hot and dry.
Fertilizer:
Apply a seaweed solution and a nitrogen-rich liquid fertilizer on a regular basis.
Re-potting:
Repot into a larger container when its roots fill the pot.
Temperature:
Thai basil is a hot-weather plant that is particularly vulnerable to frost damage. Seeds and plants should not be planted until the soil temperature has reached 18 to 21 degree Celsius and the weather has settled. Even a 10 degree night will cause the plant’s growth to be slowed for a while.