This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you click a link and make a purchase, I may receive a small commission at no extra cost to you.
The best time to plant cilantro in Massachusetts is in the early spring, as soon as the soil can be worked, and again in late summer for a fall harvest.
This is because cilantro is a cool-weather crop that absolutely hates the heat, and Massachusetts gardeners have two perfect windows to grow it successfully.
If you’ve been wondering when to plant cilantro in Massachusetts, you’ve come to the right place.
We’re going to break down the exact timing, the best varieties, and how to keep this fast-growing herb thriving in your New England garden.
So grab your gardening gloves, and let’s dig into everything you need to know about planting cilantro in the Bay State.
When to Plant Cilantro in Massachusetts for a Spring Crop
For a spring planting, the best time to plant cilantro in Massachusetts is roughly two to four weeks before the last expected frost date.
In most parts of Massachusetts, that last frost falls between late April and mid-May, depending on your specific zone.
So, that means you can often get those cilantro seeds in the ground as early as late March or early April.
Cilantro is remarkably frost-tolerant, and mature plants can handle light freezes without any damage.
When you decide when to plant cilantro in Massachusetts for spring, aim for soil temperatures around 50°F to 68°F for the best germination rates.
Here are a few key tips to nail that spring planting window.
1. Direct Sow Seeds Early
Cilantro has a long taproot, so it really dislikes being transplanted.
Instead of starting seeds indoors, direct sow them right into your garden bed.
Sow the seeds about a quarter-inch deep and space them about two inches apart in rows.
As soon as the ground thaws and you can work the soil without it clumping, that’s your signal to plant.
This early sowing is the secret to beating the summer heat that causes cilantro to bolt.
2. Use a Cold Frame for Even Earlier Planting
If you’re itching to get started, using a cold frame can extend your season even further.
With a cold frame, you can plant cilantro in Massachusetts as early as late February or early March.
The cold frame traps heat from the sun and protects the young seedlings from harsh winds.
This method is perfect for gardeners who want a jumpstart on that fresh, zesty flavor.
3. Stagger Your Plantings
Instead of planting all your cilantro at once, try succession planting.
Plant a new batch of seeds every two weeks from early spring through late spring.
This ensures you have a continuous supply of fresh leaves rather than one giant harvest that goes to seed all at once.
This is an often-overlooked aspect of when to plant cilantro in Massachusetts, but it makes a huge difference.
When to Plant Cilantro in Massachusetts for a Fall Harvest
The second-best time to plant cilantro in Massachusetts is in late summer for a delicious fall crop.
As the intense summer heat fades, cilantro seeds will germinate much more readily.
In Massachusetts, you should aim to sow your fall cilantro seeds about six to eight weeks before the first expected fall frost.
For most of the state, that means planting between mid-August and early September.
The cooler, shorter days of autumn are perfect for cilantro to grow slowly and develop a sweeter, more intense flavor.
1. Find a Partially Shaded Spot
During the late summer, the soil is still warm from the summer sun.
To keep the soil cool enough for germination, plant your fall cilantro in a location that gets some afternoon shade.
This small adjustment can be the difference between a successful fall crop and a flop.
The shade mimics the cooler conditions that cilantro naturally craves.
2. Keep the Soil Moist
Warm, dry soil can quickly kill cilantro seeds before they sprout.
Water the soil thoroughly before planting, and then keep it consistently moist.
You might even place a light layer of mulch over the soil to help retain that precious moisture.
This simple step ensures your fall planting doesn’t dry out and fail.
Why Timing Matters So Much for Cilantro
Understanding when to plant cilantro in Massachusetts is crucial because this herb is highly sensitive to day length and temperature.
When the days get longer and temperatures climb above 75°F, cilantro sends up a flower stalk, a process called bolting.
Once it bolts, the leaves turn bitter and tough, and the plant focuses all its energy on producing seeds (coriander).
By planting in the cooler months, you avoid this problem entirely and enjoy tender, flavorful leaves for weeks.
1. Bolting Ruins the Flavor
The primary reason so many Massachusetts gardeners struggle with cilantro is that they plant it too late in the season.
If you plant cilantro in Massachusetts in late May or June, you’re fighting a losing battle against the heat.
The plants will likely bolt within a few weeks, leaving you with almost no usable harvest.
Timing is everything, so stick to the early spring or late summer windows.
2. Cool Weather Enhances the Aroma
Cilantro grown in cooler temperatures produces more essential oils.
These oils are responsible for the herb’s bright, citrusy, and slightly peppery aroma.
A fall crop that matures under cool nights will be significantly more aromatic than a summer crop.
So, when you’re deciding when to plant cilantro in Massachusetts, always lean toward the cooler side.
Best Cilantro Varieties for Massachusetts Gardens
Choosing the right variety can also help you get the most out of your planting window.
Some varieties are specifically bred to be slow-bolting, which is a massive advantage in a climate like Massachusetts.
1. Slow-Bolt Cilantro
This is the go-to variety for most home gardeners.
Slow-bolt cilantro is incredibly tolerant of warmer temperatures and will take much longer to flower.
It’s the perfect choice if you want to stretch your spring harvest a little later into June.
It gives you more wiggle room when you’re figuring out when to plant cilantro in Massachusetts.
2. Leisure Cilantro
Leisure is another excellent slow-bolting option with a robust flavor profile.
It produces large, dark green leaves that are perfect for salsas, salads, and garnishes.
It grows well in both the spring and fall in Massachusetts.
This variety is a reliable performer, even with New England’s unpredictable weather.
3. Santo Cilantro
Santo is known for its vigorous growth and exceptional heat resistance.
It’s a great option if you want to try pushing your planting dates a bit.
It has a strong, classic cilantro taste that holds up well in cooked dishes.
Many commercial growers favor Santo because of its uniformity and reliability.
So, When is the Best Time to Plant Cilantro in Massachusetts?
The best time to plant cilantro in Massachusetts is definitely early April for the spring, and late August for the fall.
You can plant cilantro in Massachusetts as soon as the soil is workable in the spring, even while late frosts are still possible.
You can also plant cilantro in Massachusetts again in the late summer, around six weeks before your first autumn frost, for a second harvest.
Ultimately, the goal is to keep this herb away from the hot, long days of summer.
By sticking to these two key planting windows, you’ll ensure a steady supply of fresh, flavorful cilantro that will elevate all your favorite dishes.
So check your local frost dates, get those seeds in the ground, and enjoy a thriving cilantro patch all season long.
Happy gardening, and get ready for some incredible homemade guacamole.