How to Grow Coriander at Home from Seeds (Grower Guide)

Coriander is a fragrant, delicious herb that can be grown in your own garden. In this article, we will explore how to grow coriander at home from seeds. The coriander plant produces both leaves, and flowers on the same stem; these parts are often used in dishes as well as for medicinal purposes.

It grows best in warm climates, but can also thrive with more temperate weather if given plenty of water and sun exposure.

Plant Information

Coriander is a Mediterranean annual herb in the family Apiaceae. This herb plant that has been used for centuries in Asian, Middle Eastern and European cuisine. The leaves are what we use to flavor dishes such as curries, marinades and stews.

It’s also commonly used in Mexican food. In addition to the many culinary uses of coriander, it can be used medicinally as well. Traditionally, it was used to help relieve digestive problems such as bloating or stomach pain.

How To Sow Indoors

Coriander seeds are a hardy perennial that thrives in USDA Zones 3-8. 

Seeds can take 2-3 weeks to sprout, so if you want your plants to grow before planting them outside, make sure to start as early as possible.

Instructions:

1) Coriander seeds can be sown indoors using a seed starter kit in March or April for planting outdoors after 6 weeks when the temperature reaches 50 degrees Fahrenheit during the day and 40 degrees Fahrenheit at night. You can start them earlier if you live in zones 9 or 10 where winters are warmer.

2) When you sow coriander seeds indoors, you need to sprinkle some seeds on the surface and cover the seeds lightly with 1/4 inch of seed starting mix.

3) Keep them in the dark, and moist at a temperature of 6o degrees Fahrenheit until germination occurs.

4) Seedlings will start to sprout after 10-25 days.

5) Once sprouts appear, you can place them in an area that receives at least 4 hours of sunlight a day such as a windowsill. If you do not have a window that receives enough sunlight, you can start them indoors under artificial light, but they will eventually need access to natural light for proper growth and development.

6) Coriander will need transplanting when it reaches 2-3″ inches tall, but don’t do it too soon.​​​​​​​ It’s best to wait until the plants have two sets of leaves before you transplant them into bigger 10″ inch pots.​​​​​​​ To do this, carefully remove them from the seed starter kit cells, being careful not to damage roots too much as you remove them.

7) Planting outside in the garden is a new experience for your seedling plants. It can be hard on them and even potentially kill them, so you need to “harden off” your plant before planting it. What does this mean? Hardening off means getting your plant used to being outdoors by gradually introducing it to its new environment.

8) The first step is putting them outside in a sheltered area for a few hours each day until they are ready for direct sunlight.

9) They will also need some time with high humidity and low wind or rain. Doing this will eliminate the transplant shock when moving the plant into the garden.

Transplanting Potted Plants into your Garden

Planting echinacea in the garden is a popular choice for those who want to enjoy this plant’s beauty year-round.

1) First, select a location with full sun and well-draining organic soil.

2) Prepare the bed by turning the soil under to a depth of 5-10 inches removing any debris.

3) Add aged manure or compost if you have it available as these will provide nutrients and improve drainage. If not, fertilize with an all-purpose fertilizer prior to planting.

4) Dig a hole for the plant that is the correct size for the root ball.

5) Moisten the soil in the potted plant a bit so that it’s easier to remove.

6) Unpot the plant by gently tapping on the bottom of the pot, take care not to damage roots or break off any branches.

7) Place into a hole and fill with soil, press down firmly but be careful not to make too much.

Sowing Directly in the Garden

Growing coriander outside has some benefits, such as higher yield and more color variation in the flower petals.

1) To sow seeds directly outdoors, wait until late summer when the soil has warmed up enough to create an even layer of topsoil for your seedlings to get started. 

2) When sowing coriander directly into the garden it is important to plant them in a spot where they will get plenty of sun for the best results.

3) Remove weeds and make sure the soil is evenly moist before sowing the seeds.

4) Coriander does not like wet soil so be sure to choose an area with well-drained soil before planting.​​​​​​​

5) Cover the seeds with soil and keep moist for 10-20 days until seedlings appear.

Coriander Herb Harvesting

Coriander can be gathered when the plant has grown at least six inches in height. At this stature, the leaves of this herb will be delicate and least harsh. The stems will, in general, be increasingly sharp when contrasted with the leaves. Cut the delicate stems at the soil level.

Coriander Seed Harvesting

You can likewise gather the seeds once the coriander plant creates seed heads and blossoms. The reaped seed heads ought to be an earthy colored (brown) shading and are accessible in the seed heads. The seeds can be gathered once they get brown color.

Coriander Grow Tips

  • Sow seeds indoors about 6 weeks before the last frost date, then transplant outdoors when weather warms up.
  • Keep plants evenly moist, but not soggy wet.
  • Feed plants once every 2 weeks with an all-purpose fertilizer for herbs (e.g., Miracle Gro).
  • Sow seeds every few weeks to maintain freshness of flavor and provide continual harvests. 
  • Coriander does best in a warm, sunny location.
  • It needs at least 6 hours of sunlight each day.
  • You can also plant it indoors under artificial light if you live in an area with cold winters or cloudy days.
  • Soil should be well-drained and rich in organic matter, with pH between 6.5 to 7.5.
  • Plant in full sun at least 2 feet apart or 1 keep them 1 foot apart if using containers.
  • Start with a quality potting soil, not garden soil.
  • Choose your pot size wisely.
  • Put some pebbles or rocks in the bottom of your pot for drainage and weight.
  • Use one part compost, two parts potting mix, and three parts sand when filling your pots with dirt for planting seeds or seedlings. 
  • Prune regularly to keep plants healthy and prevent them from getting leggy.
  • Harvest by cutting leaves as needed.
  • Keep soil moist until seedlings emerge, then water regularly, but do not overwater.
  • Mulch the area around plants to retain moisture.
  • Keep pests away by surrounding plants with plants that repel them, such as catnip or spearmint. 
  • Once the plant starts growing, it should be watered once every 3-4 days if rain doesn’t come for long periods of time. It’s important to weed regularly because weeds will compete with your plants for nutrients and space. 

Common Pests

Growing your own common coriander can be a rewarding experience. However, if you don’t take care of it properly, the pests will come in and destroy your harvest.

These garden pests can wreak havoc on any plant, so here are some tips to keep them away from your common coriander plants.

  • Keep the soil moist at all times but not wet
  • Make sure there is good drainage
  • If the leaves start curling up or turning brown then that means the plant is getting too much water and you should stop watering
  • Pick off any pests that have already started attacking your plants

Some of the most common garden pests are slugs, snails, aphids, beetles and earwigs. You can avoid these pesky bugs by:

  • Planting marigolds around your coriander plants to deter insects.
  • Put up a fence around your garden beds with netting or fabric underneath it to keep away slugs and snails.
  • Use row covers to deter pests like aphids, white flies and mealybugs from ruining your garden’s plants by sucking their juices out of them. Row covers can be made from a variety of materials including lightweight nylon cloth, polyester fabric or cheesecloth, which all provide protection for the plant and are easy to put on and take off as needed.
  • Insecticidal soap is an excellent organic insecticide that is safe for humans when used properly. It is often sold as a concentrate and can be diluted with water to create an all-purpose solution.
  • Sticky traps or yellow, adhesive flypaper that is hung near the plant.