In cooking, cilantro seeds are called coriander. The “seeds” are actually two cilantro seeds encased in a husk. The husk is hard, round and is light brown or grey in color. Before you plant them in the ground, you need to prepare the cilantro seeds to increase the chances that they will germinate. Gently crush the seed husk holding the two seeds together. Soak the cilantro seeds in water for 24 to 48 hours. Remove from the water and allow to dry.
How to Plant Cilantro
Once you have prepared the cilantro seeds, you need to plant the seeds. You can either start cilantro indoors or outdoors. If you’re starting the seeds indoors, you’ll be transplanting cilantro to the outdoors later on.
Put the seeds in the soil and then cover them with about a 1/4-inch layer of soil. Leave the cilantro growing until it is at least 2 inches tall. At this time, thin the cilantro to be about 3 to 4 inches apart. You want to grow cilantro in crowded conditions because the leaves will shade the roots and help to keep the plant from bolting in hot weather.
If you’re transplanting cilantro into your garden, dig holes 3 to 4 inches apart and place the plants in them. Water thoroughly after transplanting.
Cilantro Growing Conditions
The most important thing to remember when growing cilantro is that it doesn’t like hot weather. Cilantro growing in soil that reaches 75 F. (24 C.) will bolt and go to seed. This means that the ideal cilantro growing conditions are cool but sunny. You should be growing cilantro where it will get early morning or late afternoon sun, but be shaded during the hottest part of the day.
Additional Tips for Growing Cilantro
Even with ideal cilantro growing conditions, this is a short-lived herb. Taking the time to prune cilantro frequently will help delay bolting and prolong your harvest time, but no matter how much you prune cilantro, it will still eventually bolt. Plant new seeds about every six weeks to keep a steady supply throughout the growing season.