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Cilantro plants grow quickly from seed and thrive in cool weather, which makes them a rewarding herb to grow in your garden or even on a windowsill.
They start as tiny seedlings and mature in about 45 to 70 days, depending on the variety and the growing conditions.
If you’ve ever asked yourself how do cilantro plants grow, the short answer is that they grow fast, they love mild temperatures, and they need consistent moisture and plenty of light.
The fun part is that cilantro plants grow in two very different ways depending on what you want from them.
You can harvest the leaves as cilantro, or let the plant bolt so you can harvest coriander seeds.
In this post, we’ll walk through how cilantro plants grow from seed to harvest, what they need at every stage, and how to keep them producing for as long as possible.
How Cilantro Plants Grow: A Stage-by-Stage Look
Cilantro plants grow through a series of clear stages, and knowing what happens at each one helps you get the best harvest.
1. Germination Takes Time
Cilantro seeds are actually small fruits that contain two seeds each, so a single planting often gives you two seedlings.
The seeds germinate best in soil between 55°F and 70°F.
Germination usually takes 7 to 10 days, though it can stretch to three weeks in cooler conditions.
That’s why cilantro plants grow slower than many other herbs at the very beginning.
Soak the seeds overnight before planting to soften the outer shell and speed things up.
2. Seedlings Establish Fast
Once the seeds sprout, cilantro plants grow quickly into delicate seedlings with lacy, feathery leaves.
At this stage they need bright light, ideally six or more hours of sun each day.
Thin the seedlings so they stand about 6 to 8 inches apart, because crowding stunts the way cilantro plants grow.
Keep the soil evenly moist but never soggy, since young roots rot easily in waterlogged ground.
3. Vegetative Growth Is All About Leaves
During the vegetative stage, cilantro plants grow fresh leaves from the center of the plant.
This is the part most gardeners care about, because these are the leaves you snip for salsa, curries, and garnishes.
Regular harvesting actually encourages cilantro plants to grow more leaves instead of slowing them down.
Feed them lightly with a balanced fertilizer every few weeks if your soil is poor.
Too much nitrogen, though, makes the plants weak and less flavorful.
4. Bolting Changes Everything
When the weather warms up, cilantro plants grow a tall central stem and stop producing leaves.
This process, called bolting, happens when soil temperatures climb above 75°F or when daylight lengthens in summer.
The plant shifts its energy into flowering because its goal is to make seeds before the heat kills it.
Unfortunately, bolting makes the leaves taste bitter and the plant stops being useful for leaf harvest.
You can slow bolting by planting cilantro in partial shade and choosing slow-bolt varieties, but you can’t stop it completely.
5. Flowering and Seed Production
After bolting, cilantro plants grow small white or pink flowers that attract bees and other pollinators.
Once the flowers fade, they turn into round, ribbed seeds, which are the coriander you buy in spice jars.
That’s the beautiful double life of cilantro: the leaves are cilantro, and the seeds are coriander.
Harvest the seeds when they turn brown but before they drop, and let them dry fully before storing.
What Helps Cilantro Plants Grow Better
If you want cilantro plants to grow strong and stay leafy for longer, a few simple habits make a big difference.
1. Plant in Cool Seasons
Cilantro plants grow best in spring and fall, when daytime temperatures stay between 50°F and 70°F.
In hot climates, grow cilantro in fall, winter, or early spring for the best leaf production.
2. Water Consistently
Cilantro plants grow fast when the soil stays evenly moist, so water whenever the top inch of soil feels dry.
Mulch around the base to hold moisture and keep the roots cool.
3. Give Them Room and Light
Cilantro plants grow best in full sun to partial shade with good airflow between plants.
Space them properly and you’ll see fewer problems with mildew and leggy stems.
4. Harvest Often
The more you cut, the more cilantro plants grow new leaves, so snip outer stems regularly and never strip the whole plant at once.
5. Sow Successively
Because cilantro plants grow and bolt quickly, sow new seeds every two to three weeks for a steady supply all season.
So, How Do Cilantro Plants Grow?
Cilantro plants grow fast from seed, produce tender leaves in cool weather, and then bolt into flowers and coriander seeds once the heat sets in.
They germinate slowly, establish quickly, and reward you with leaves within a month or so of planting.
Understanding how cilantro plants grow at each stage lets you time your planting, slow bolting, and enjoy both the herb and the spice from the same plant.
Plant a batch this season, keep the soil moist, and harvest often, and you’ll see exactly how cilantro plants grow right in your own garden.