Seed Sowing Environment
Cilantro seeds should be sown in the spring after the last frost in a moist, but well-drained, soil plot. Grown mainly in U.S. Department of Agriculture's hardiness zones 3 through 8, these seeds enjoy the cooler spring weather so they can germinate with ample water and sunlight. They can grow up to 3 feet tall and 2 feet wide. If you decide to grow cilantro in the fall or winter, your hardiness zone will need to be warmer, such as within zone 9 through 11. You can grow cilantro in batches, or timed intervals, so that you have a constant supply of fresh herbs; simply pull a few leaves from the growing plant to rejuvenate your dinner meal.
Planting for Leaves
The cilantro species has a taproot system, rather than a sprawling network of small roots. Of all the different cilantro varieties, you should choose either "Leisure," "Long-Standing" or "Costa Rica" for harvesting leaves. These particular varieties have a slow-bolting taproot that contributes to the leaves' desirable flavor. Because the taproot does not harness its energy into bolting, or rapid flowering, the flavor will remain in the leaves for cooking. During the growing process, you should look out for common cilantro pests, such as wedge-shaped leaf hoppers and fungal wilt; both can easily decimate a cilantro crop.
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