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Yes, cilantro can be started indoors, and it’s actually one of the easier herbs to grow from seed inside your home.
Whether you’re a seasoned gardener or someone who just wants fresh cilantro for your salsa, starting cilantro indoors gives you a big head start on the growing season.
You can start cilantro indoors in small pots, seed trays, or even recycled containers as long as you give the plants what they need.
In this post, we’ll walk through how to start cilantro indoors, the best conditions for cilantro to thrive, and common mistakes to avoid.
Let’s dig in.
Why You Can Start Cilantro Indoors
Cilantro can be started indoors successfully because it’s a cool-season herb that germinates quickly and doesn’t need a lot of space.
Here’s why starting cilantro indoors works so well:
1. Cilantro Germinates Fast Indoors
When you start cilantro indoors, you’ll often see sprouts within 7 to 10 days.
That’s because cilantro seeds (which are actually the coriander seeds you see in spice jars) germinate best in consistent, mild temperatures.
Indoor conditions let you control the temperature and moisture, which gives cilantro seeds a reliable environment to sprout.
2. You Control the Growing Environment
Starting cilantro indoors means you’re not at the mercy of outdoor weather.
Cilantro bolts (goes to seed) quickly in hot weather, so growing cilantro indoors lets you keep temperatures cooler and extend your harvest.
You can also protect young cilantro seedlings from pests, heavy rain, and sudden cold snaps by keeping them inside.
3. Cilantro Grows Well in Containers
Cilantro has a shallow root system, which makes it perfect for pots and containers.
That’s another reason cilantro can be started indoors without any trouble.
A pot that’s at least 6 to 8 inches deep gives cilantro roots plenty of room, and you can move the pot around to catch the best light.
4. You Get a Head Start on the Season
If you start cilantro indoors a few weeks before the last frost, you’ll have transplants ready to go outside as soon as the weather cooperates.
You can also keep cilantro indoors year-round on a sunny windowsill, which means fresh leaves even in the middle of winter.
Starting cilantro indoors basically gives you a jump on the growing season and a steady supply of fresh herbs.
How to Start Cilantro Indoors Step by Step
Starting cilantro indoors is simple if you follow a few key steps.
Here’s how to do it right:
1. Choose the Right Container
Pick a pot or seed tray with drainage holes.
Cilantro hates soggy roots, so drainage is a must when you start cilantro indoors.
A 6-inch pot works for a single plant, while a wider container lets you grow several cilantro plants together.
2. Use Loose, Well-Draining Soil
Fill your container with a lightweight potting mix.
You can mix in some perlite or sand to improve drainage, which helps cilantro seedlings avoid damping off.
A soil pH between 6.2 and 6.8 is ideal for cilantro.
3. Plant the Seeds at the Right Depth
Sow cilantro seeds about a quarter inch deep.
You can scatter a few seeds per pot and thin them later, or plant them an inch or two apart if you want to skip thinning.
Lightly cover the seeds with soil and gently water them in.
4. Keep the Soil Moist but Not Soaked
Cilantro seeds need consistent moisture to germinate.
Mist the soil daily or water gently whenever the surface starts to dry out.
A spray bottle works great for this because it won’t disturb the seeds.
5. Give Cilantro Plenty of Light
Once your cilantro sprouts, it needs at least 4 to 6 hours of bright light per day.
A south-facing window works well, or you can use a grow light if natural light is limited.
Without enough light, cilantro seedlings get leggy and weak.
Best Conditions for Growing Cilantro Indoors
To keep cilantro thriving indoors, you need to nail a few conditions.
Here’s what cilantro likes:
1. Cool Temperatures
Cilantro grows best between 60°F and 70°F.
Warmer indoor temperatures can cause cilantro to bolt early, so keep it away from heating vents and radiators.
If your home runs warm, a cooler spot near a window is your best bet.
2. Bright, Indirect Light
Cilantro loves bright light but not intense, scorching heat.
Six hours of sunlight or 12 to 14 hours under a grow light keeps cilantro productive indoors.
Rotate your pots regularly so all sides of the cilantro plant get even light.
3. Regular Watering
Water cilantro whenever the top inch of soil feels dry.
Consistent moisture keeps cilantro leaves tender and flavorful.
Just don’t let the pot sit in standing water, since that leads to root rot.
4. Occasional Feeding
If you start cilantro indoors in fresh potting mix, it usually has enough nutrients for the first few weeks.
After that, feed cilantro with a diluted liquid fertilizer every two to three weeks.
Don’t overdo it, because too much nitrogen makes cilantro grow leaves at the expense of flavor.
Common Mistakes When Starting Cilantro Indoors
Even though cilantro can be started indoors easily, a few missteps can trip you up.
Watch out for these:
1. Overwatering
Too much water is the number one killer of cilantro seedlings.
Soggy soil causes damping off, a fungal issue that makes seedlings collapse at the base.
Always let the soil drain well and never leave cilantro sitting in water.
2. Not Enough Light
Cilantro started indoors on a dim windowsill will stretch toward the light and produce weak, spindly growth.
If your cilantro looks leggy, move it to a brighter spot or add a grow light.
3. Letting It Get Too Hot
Heat makes cilantro bolt, which means it stops producing leaves and starts flowering.
Keep cilantro in a cool room and away from heat sources to delay bolting.
4. Planting Too Many Seeds in One Pot
Cilantro needs airflow, and overcrowded seedlings compete for water and nutrients.
Thin your cilantro to a few inches apart once the seedlings have a couple of true leaves.
So, Can Cilantro Be Started Indoors?
Cilantro can be started indoors, and doing so gives you fresh, flavorful leaves right at your fingertips.
With the right container, soil, light, and temperature, starting cilantro indoors is a simple project that pays off big in the kitchen.
Whether you’re growing cilantro for salsa, soups, or garnishes, starting cilantro indoors is a smart way to enjoy this herb all year long.
So grab some seeds, a pot, and a sunny spot, and start your cilantro indoors today.