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Yes, you can plant cilantro in September, and it’s actually one of the best times to do it in many climates.
If you’ve been wondering whether you can plant cilantro in September, the short answer is a resounding yes, as long as you time it right and give your plants the conditions they love.
Cilantro thrives in cooler weather, and September’s milder temperatures are often perfect for getting a fresh crop going.
In this post, we’ll explore why you can plant cilantro in September, how to do it successfully, and what to watch out for so your herb garden stays productive.
Let’s dig in.
Why You Can Plant Cilantro in September
You can plant cilantro in September because the plant prefers cool temperatures over the blazing heat of midsummer.
Here’s why September is such a sweet spot for planting cilantro.
1. Cilantro Bolts in Heat, Not in Cool Weather
Cilantro is notorious for bolting, which means it shoots up a flower stalk and stops producing those tasty leaves.
That happens fast when temperatures climb above 75°F.
But when you plant cilantro in September, the cooler days and nights keep the plant in leaf-production mode much longer.
So you get a longer harvest window instead of a quick bolt.
2. Soil Is Still Warm Enough for Germination
Cilantro seeds need soil temperatures around 55–70°F to germinate well.
In September, the ground is still warm from summer, so seeds sprout quickly.
At the same time, the air is cooling down, which is exactly what cilantro loves.
This combination makes September planting a win-win.
3. Fewer Pests and Less Bolting Pressure
Aphids and other common cilantro pests tend to be less aggressive in the fall.
And because the plant isn’t stressed by heat, it’s less likely to bolt prematurely.
When you plant cilantro in September, you’re basically giving it a head start on a stress-free growing season.
How to Plant Cilantro in September Successfully
Planting cilantro in September isn’t complicated, but a few smart moves make a big difference.
Here’s how to do it right.
1. Choose the Right Spot
Cilantro likes full sun in cooler weather but appreciates partial shade if September still brings occasional heat spikes.
Pick a spot that gets at least four to six hours of sun.
If you live in a hot climate, afternoon shade is a bonus.
2. Sow Seeds Directly
Cilantro doesn’t transplant well because of its taproot.
So when you plant cilantro in September, sow the seeds directly into the garden or a container.
Plant them about a quarter inch deep and keep the soil moist.
You can also succession sow every two to three weeks for a continuous supply.
3. Keep the Soil Consistently Moist
Cilantro needs regular watering, especially while seeds are germinating.
Aim for moist but not soggy soil.
Mulching lightly helps retain moisture and keeps the roots cool.
4. Fertilize Lightly
Cilantro isn’t a heavy feeder.
A little compost or a diluted liquid fertilizer once or twice during the season is plenty.
Too much nitrogen can actually encourage leaf growth at the expense of flavor.
5. Harvest Often
Once your cilantro is a few inches tall, start snipping the outer leaves.
Regular harvesting encourages more growth and delays bolting.
If you plant cilantro in September and keep cutting, you’ll be enjoying fresh leaves well into fall.
Common Mistakes When You Plant Cilantro in September
Even though September is a great time, a few missteps can trip you up.
Here’s what to avoid.
1. Waiting Too Late
If you plant cilantro in September but wait until the very end of the month in a cold climate, the first frost might cut your harvest short.
Aim for early to mid-September if you can.
2. Overwatering
Cilantro hates soggy roots.
Water deeply but let the top inch of soil dry out slightly between waterings.
3. Ignoring Frost Forecasts
Cilantro can handle a light frost, but a hard freeze will kill it.
If you plant cilantro in September in a colder zone, keep row covers handy for those first chilly nights.
So, Can You Plant Cilantro in September?
You can plant cilantro in September, and in many regions it’s actually the best time to sow this cool-season herb.
The milder temperatures, warm soil, and reduced pest pressure all work in your favor.
Just sow directly, keep the soil moist, and harvest regularly.
If you’ve been asking whether you can plant cilantro in September, now you know the answer is yes, and you can enjoy fresh, homegrown cilantro right through the fall.