Water the plants until the water comes out the drainage holes. Check the soil frequently, but cilantro growing indoors should only be watered when the soil is dry to the touch. This will be more often in the summer months. To grow cilantro indoors, it's important that the plant have full sun four to five hours per day.
Then, can you grow coriander outside?
If you are going to grow coriander in beds outside, this is best done from seed, as transplanting coriander can cause plants to bolt - not ideal as it's the foliage that the plant is grown for, rather than the seeds (although these do have their uses).
Can you grow coriander from spice seeds?
The Spice Aisle. There are a few herbs that can be grown from seeds purchased in the spice section of your local grocery store. Coriander (cilantro), dill and fennel can all be grown from these seeds. If they germinate, plant and grow these seeds as you would any other herb seed.