When To Plant Cilantro In Colorado

The best time to plant cilantro in Colorado is in early spring, as soon as the soil can be worked, and again in late summer for a fall harvest.
 
Cilantro is a cool-season herb that absolutely thrives in Colorado’s variable mountain climate, but it bolts quickly when the summer heat arrives.
 
If you’ve been wondering when to plant cilantro in Colorado, the answer really comes down to timing those windows perfectly to beat the heat.
 
In this post, we’ll break down the ideal planting windows, how to handle Colorado’s unpredictable frost dates, and the best techniques to keep your cilantro happy and productive.
 
Let’s dig in and get your cilantro growing.
 

When to Plant Cilantro in Colorado: The Key Windows

When to plant cilantro in Colorado depends on your specific elevation and local microclimate, but there are two main planting windows that work for nearly every gardener.
 
The first window is early spring, typically from mid-March through early May, depending on where you live.
 
The second window is late summer, from mid-August through early September, which sets you up for a delicious fall crop.
 
Let’s break down these timing options so you can nail the perfect schedule for planting cilantro in Colorado.
 

1. Early Spring Planting for Cilantro in Colorado

The best time to plant cilantro in Colorado for a spring harvest is as soon as the ground thaws and is workable.
 
In the Front Range, this usually lands anywhere from late March to mid-April.
 
At higher elevations like the mountains or foothills, you might push that closer to early or even mid-May.
 
Cilantro is frost-tolerant down to about 25°F, so a light spring snow won’t usually kill your young plants.
 
You can even plant cilantro in Colorado while there’s still a chance of frost because this herb handles cold soil exceptionally well.
 
The trick is to get those seeds in the ground early enough that the plants mature before our hot, dry summer weather arrives.
 
Once daytime temperatures consistently hit the 80s, cilantro will send up a flower stalk and go to seed, which is called bolting.
 

2. Late Summer Planting for a Fall Crop

Many gardeners ask when to plant cilantro in Colorado for a fall harvest, and the answer is about six to eight weeks before your first expected fall frost.
 
For most of Colorado, that means planting cilantro in late August or early September.
 
The fall window is often even more rewarding than spring because the cooler temperatures and shorter days keep cilantro from bolting as quickly.
 
You’ll get lush, tender leaves that are perfect for salsas, salads, and garnishes well into October or even November in milder years.
 
This second planting of cilantro in Colorado takes advantage of the natural cooling trend, which is exactly what this herb craves.
 

3. Succession Planting for Continuous Cilantro in Colorado

If you really want a steady supply, you should consider succession planting cilantro in Colorado every two to three weeks during those prime windows.
 
For the spring window, plant a new batch of seeds every couple weeks from mid-March through late April.
 
For the fall window, do the same from mid-August through mid-September.
 
This staggered approach means you’ll always have young, tender cilantro ready to pick while older plants are busy going to seed.
 
It’s a smart way to maximize your harvest and answer the question of when to plant cilantro in Colorado more completely.
 

Understanding Colorado’s Climate for Cilantro

Colorado’s climate is unique because of the intense sunshine, low humidity, and dramatic temperature swings between day and night.
 
Cilantro actually loves these cool nights and bright days, which is why it does so well here when planted at the right time.
 
The main challenge is the heat, because cilantro is not a fan of temperatures above 75°F for extended periods.
 
Once the soil warms up and the air gets hot, cilantro shifts its energy from leaf production to flowering and seeding.
 
That’s why knowing when to plant cilantro in Colorado is so important, because timing is everything with this herb.
 

1. Soil Temperature Matters for Planting Cilantro in Colorado

Cilantro seeds germinate best when the soil temperature is between 55°F and 68°F.
 
In early spring, Colorado soil often sits right in that sweet spot, especially if you’ve prepared your beds with organic matter.
 
If the soil is still frozen or too cold, germination will be slow, so you can wait a bit or use a cold frame to warm things up.
 
In late summer, the soil is usually still warm from the heat, but the air is cooling down, which is perfect for germination.
 
Just keep the soil consistently moist during that fall planting to encourage quick sprouting.
 

2. Sun Exposure and Shade for Cilantro in Colorado

Full sun is great for cilantro in Colorado during the cooler months, but partial shade can be a lifesaver as the season warms.
 
Plant cilantro in a spot that gets morning sun and afternoon shade, especially for your late spring plantings.
 
This will help delay bolting and keep those leaves tender and flavorful for longer.
 
For your fall crop, you can give cilantro more sun since the temperatures are cooler and the sun is less intense.
 
Adjusting sun exposure is a key part of answering when to plant cilantro in Colorado successfully.
 

Tips for Planting Cilantro in Colorado Successfully

Once you know when to plant cilantro in Colorado, you need to nail the actual planting technique to get great results.
 
Cilantro has a long taproot, so it doesn’t like being transplanted, which means direct sowing is always the best approach.
 
Sow seeds about a quarter-inch deep and space them about two inches apart in rows or clusters.
 
Keep the soil consistently moist until germination, which usually takes seven to fourteen days depending on soil temperature.
 
Cilantro also appreciates rich, well-draining soil, so mix in some compost before you plant.
 
And once your cilantro is up, water it regularly to prevent it from getting stressed, because stress triggers early bolting.
 

So, When to Plant Cilantro in Colorado?

The best time to plant cilantro in Colorado is in early spring, from mid-March to early May, and again in late summer, from mid-August to early September.
 
Cilantro thrives in Colorado’s cool seasons, so timing your planting to avoid the summer heat is the key to a bountiful harvest.
 
Whether you’re planting cilantro in Colorado for the first time or you’re a seasoned gardener, these windows will give you the best chance at success.
 
Remember to direct sow your seeds, keep the soil moist, and consider succession planting for a continuous supply.
 
Now that you know when to plant cilantro in Colorado, you can get out there and enjoy this amazing, fresh herb all season long.