Coriander Seeds – Coriandrum sativum

Coriander germination tips generally point to a window of seven to twenty days, but that range depends heavily on soil temperature, moisture levels, and how the seeds were prepared before sowing. Soil temperatures between 60 and 70 degrees Fahrenheit tend to produce the most consistent sprouting. Lightly crushing the seed husks before planting and keeping the seedbed evenly moist without letting it dry out between waterings will give your seeds the conditions they need.

Coriander grows well in soil with a pH between 6.2 and 6.8, which is mildly acidic to nearly neutral. If you are unsure of your soil pH, an inexpensive test kit from a garden center will give you a reliable reading. Soils outside this range can affect how well the plant takes up nutrients, so amending with lime to raise pH or sulfur to lower it is worth doing before you sow.

Growing coriander in containers works well as long as the pot is deep enough to accommodate the taproot, so choose a container at least eight to ten inches deep and twelve inches wide. Use a well-draining potting mix and make sure the container has drainage holes, since coriander sitting in soggy soil will decline quickly. Container plants dry out faster than garden beds, so check moisture daily during warm weather and water before the top inch of soil becomes completely dry.

The most reliable way to prevent cilantro bolting is to grow it during cooler parts of the year and make small, staggered sowings every two to three weeks so you always have young plants coming along as older ones go to seed. Providing afternoon shade in warm climates can extend your leaf harvest by slowing the plant's response to heat. Harvesting frequently also signals the plant to keep producing leaves rather than putting its energy into flowers and seeds.

For cilantro leaves, you can begin harvesting once plants are about six inches tall, cutting stems just above a leaf node to encourage regrowth. For coriander seeds, wait until the flower heads have faded and the seed husks have turned from green to a dry tan or brown color, then cut the whole stem and hang it upside down inside a paper bag in a dry, ventilated space for one to two weeks. The bag catches any seeds that fall as the heads finish drying.

Coriander is not listed as a toxic plant for cats or dogs by major veterinary poison resources, and small amounts are generally considered non-harmful. That said, any plant consumed in large quantities can cause digestive upset in pets, so it is worth keeping curious animals from grazing freely on your herb garden. If your pet eats a significant amount and shows signs of illness, contacting your veterinarian is always the right step.

For leaf production, spacing plants six to eight inches apart gives each one enough room to develop without crowding, which also improves air circulation and reduces the chance of fungal issues in humid conditions. If you are growing primarily for seed harvest, you can space plants slightly further apart at ten to twelve inches, since the plants will grow taller and broader as they move through their full life cycle. In rows, keeping row spacing at twelve inches makes it easier to water, weed, and harvest without disturbing neighboring plants.