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You can plant cilantro seeds outdoors after the last frost date in spring when soil temperatures consistently stay above 55°F.
If you’re wondering when to plant cilantro seeds outdoors, the short answer is early spring or late summer for a fall harvest.
Cilantro is a cool-season herb that bolts quickly in heat, so timing your planting around mild weather is the key to success.
In this post, we’ll explore exactly when to plant cilantro seeds outdoors, how to prepare your soil, and tips for keeping your crop productive longer.
When to Plant Cilantro Seeds Outdoors
The best time to plant cilantro seeds outdoors depends on your climate and the season you’re targeting.
Cilantro thrives in temperatures between 50°F and 85°F, which means spring and fall are its sweet spots.
If you plant cilantro seeds outdoors too late in spring, the heat will cause your plants to bolt and go to seed before you get a decent harvest.
1. Early Spring Planting
Plant cilantro seeds outdoors as soon as the soil can be worked in spring, usually two to three weeks before your last frost date.
Cilantro seeds germinate well in cool soil, and light frost won’t harm the seedlings once they emerge.
This early start gives your cilantro plenty of time to grow before summer heat arrives.
2. Late Summer for a Fall Crop
If you want a second harvest, plant cilantro seeds outdoors again in late summer, about 6 to 8 weeks before your first fall frost.
The cooler temperatures of autumn are perfect for cilantro, and your plants will produce tender leaves well into fall.
This is especially useful in warm climates where spring-planted cilantro bolts almost immediately.
3. Succession Planting for Continuous Harvest
One of the smartest tricks is to plant cilantro seeds outdoors every 2 to 3 weeks during cool seasons.
This staggered approach ensures you always have fresh cilantro ready for picking.
When one batch starts to bolt, the next one is already coming up behind it.
How to Plant Cilantro Seeds Outdoors
Knowing when to plant cilantro seeds outdoors is only half the battle, so let’s talk about how to do it right.
Cilantro isn’t fussy, but a few simple steps will boost your germination rate and overall yield.
1. Choose the Right Spot
Cilantro prefers full sun to partial shade, but in hotter regions, a little afternoon shade helps delay bolting.
Pick a spot with well-draining soil rich in organic matter.
If you plant cilantro seeds outdoors in a spot that stays soggy, the seeds may rot before they sprout.
2. Prepare the Soil
Loosen the top few inches of soil and mix in some compost to give your cilantro a healthy start.
Cilantro grows best in soil with a pH between 6.2 and 6.8.
Rake the surface smooth so your seeds have good contact with the soil.
3. Sow the Seeds
Plant cilantro seeds outdoors about a quarter inch deep and 6 to 8 inches apart.
You can also scatter the seeds thinly and cover them with a light layer of soil.
Water gently after sowing to settle the seeds into place.
4. Keep the Soil Moist
Cilantro seeds need consistent moisture to germinate, which usually takes 7 to 10 days.
Mist the soil daily or water lightly to keep it damp but not soaked.
Once seedlings appear, you can reduce watering to about an inch per week.
Tips for Growing Cilantro from Outdoor Seeds
Getting cilantro to thrive after you plant cilantro seeds outdoors comes down to a few smart habits.
These tips will help you enjoy fresh leaves for as long as possible before the plant bolts.
1. Water Consistently
Cilantro likes evenly moist soil, so don’t let it dry out completely between waterings.
A drip irrigation system or soaker hose works great for keeping moisture steady.
2. Mulch Around Your Plants
A thin layer of mulch helps retain soil moisture and keeps the roots cool.
This is especially helpful when you plant cilantro seeds outdoors in warmer climates.
3. Harvest Regularly
Snip the outer leaves often to encourage new growth and delay bolting.
Once you see flower stalks forming, pinch them off to extend your harvest.
4. Replant Every Few Weeks
Because cilantro has a short life cycle, the best way to keep it coming is to plant cilantro seeds outdoors in succession.
A new batch every couple of weeks means you’ll never run out.
5. Grow in Partial Shade During Summer
If you plant cilantro seeds outdoors in summer, choose a spot that gets shade during the hottest part of the day.
This small adjustment can make a big difference in how long your cilantro lasts.
So, When to Plant Cilantro Seeds Outdoors?
The best time to plant cilantro seeds outdoors is in early spring after the last frost or in late summer for a fall crop.
Cilantro loves cool weather, so timing your planting around mild temperatures is the secret to a plentiful harvest.
By planting in succession and following a few simple care tips, you can enjoy fresh cilantro from your garden for months.
Whether you plant cilantro seeds outdoors in spring or fall, a little planning goes a long way.
Now you know exactly when to plant cilantro seeds outdoors, so grab your seeds and get growing.