Coriander does not need support why?​

Coriander (/ˌkɒriˈændər, ˈkɒriændər/;[1] Coriandrum sativum) is an annual herb in the family Apiaceae. It is also known as Chinese parsley, dhania or cilantro (/sɪˈlæntroʊ, -ˈlɑːn-/).[2] All parts of the plant are edible, but the fresh leaves and the dried seeds (as a spice) are the parts most traditionally used in cooking.

Keep the soil or compost moist as it tends to run to seed if allowed to dry out, but take care not to overwater - especially in autumn and winter - as too much water can lead to rotting. Give plants a light liquid feed of a general feed every couple of weeks during late spring and summer

you are perfect just the way you are