Cilantro/Coriander

What is the difference between coriander and cilantro? Coriander is the seed and cilantro is the plant! At the end of the growing season, let your cilantro plant flower and produce seeds to get coriander.
Cilantro is a short-lived herb, which means that it can have a short lifespan. To get proper cilantro leaves, plant your seeds in early spring or fall. In the south, cilantro can grow well into winter.
Avoid transplanting, so start your seeds in place, either in the garden or inside. Cilantro seeds can be broadcast and can grow in terrible soil outdoors. Just be sure that it has good drainage. Indoors is more difficult because cilantro grows a fairly large taproot. Without the space for a taproot, more fertilizer is needed for indoor growing.
Cilantro is commonly used as a companion plant because it has numerous small flowers to attract beneficial insects, and is pungent enough to repel certain creatures. Cilantro makes a good companion to tomato, spinach, dill, onion, peppers, and many other herbs.
To prevent bolting, harvest often, cutting back up to a third of the plant at a time. Cilantro plants can get quite large in the garden, so you can harvest weekly from a larger plant. Cilantro bolts with high soil heat, so mulch can stave off flowers as well.
The most common issue for cilantro is leaf spot, a fungal disease caused by cool, damp conditions. Air circulation between plants can help prevent disease, watering at the base of plants, and practicing good crop rotation with cilantro and carrot family members to prevent a build up of disease in the soil. If you do get an infection, remove the infected plant(s) and burn it - adding it to your composter only gives it a place to breed and possibility of reintroduction when you use that compost later. Fungal sprays can help reduce infection but do not eradicate it.
At the end of the plant’s life, cilantro will flower and produce seed pods, holding coriander. Let the seed pods dry fully on the plant before harvesting.