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.
You can grow cilantro in a greenhouse by giving it cool temperatures, bright light, and consistently moist soil.
Cilantro is one of those herbs that loves a gentle environment, and a greenhouse gives you the power to create exactly that.
If you’ve been wondering how to grow cilantro in a greenhouse without it bolting too fast, you’re in the right place.
In this post, we’ll walk through how to grow cilantro in a greenhouse step by step, from planting to harvest.
Let’s dig in.
Why Grow Cilantro in a Greenhouse
Growing cilantro in a greenhouse solves the biggest problem this herb faces outdoors: unpredictable weather.
Cilantro thrives in temperatures between 50°F and 70°F, and a greenhouse lets you hold that range steady.
Here’s why growing cilantro in a greenhouse works so well:
1. You Control the Temperature
Cilantro bolts, or goes to seed, when the weather gets too hot.
A greenhouse lets you keep things cool, which means you can grow cilantro in a greenhouse for months instead of weeks.
You can shade the structure, vent it, or add a fan to keep temperatures in that sweet spot.
2. You Extend the Growing Season
When you grow cilantro in a greenhouse, you can plant earlier in spring and keep harvesting well into fall or even winter.
That means fresh cilantro in your kitchen practically year-round.
3. You Protect Against Pests and Weather
Growing cilantro in a greenhouse shields your plants from heavy rain, wind, and many common pests.
Fewer stressors means healthier leaves and a longer harvest window.
How to Grow Cilantro in a Greenhouse Step by Step
Now let’s get into the practical side of how to grow cilantro in a greenhouse.
1. Start with the Right Soil
Cilantro likes loose, well-draining soil with plenty of organic matter.
A mix of potting soil and compost works great when you grow cilantro in a greenhouse beds or containers.
Aim for a soil pH between 6.2 and 6.8 for the best growth.
2. Sow Seeds Directly or in Pots
Cilantro has a taproot, so it doesn’t transplant well.
If you want to know how to grow cilantro in a greenhouse successfully, sow seeds directly where they’ll grow.
Plant seeds about a quarter inch deep and space them an inch or two apart.
You can succession sow every two to three weeks to keep a steady supply.
3. Give It Bright but Gentle Light
When you grow cilantro in a greenhouse, aim for six to eight hours of bright, indirect light.
Too much direct sun in a hot greenhouse can stress the plants and trigger bolting.
Shade cloth or a light whitewash on the glass can help during warmer months.
4. Keep the Soil Consistently Moist
Cilantro doesn’t like to dry out completely.
Water when the top inch of soil feels dry, and keep humidity around 40% to 60% when you grow cilantro in a greenhouse.
Good airflow is important too, because it helps prevent fungal issues.
5. Feed Lightly
Cilantro isn’t a heavy feeder.
A diluted liquid fertilizer every few weeks is plenty when you grow cilantro in a greenhouse.
Too much nitrogen leads to lots of leafy growth but weaker flavor.
Common Problems When You Grow Cilantro in a Greenhouse
Even with the best setup, a few issues can pop up.
1. Bolting
Bolting is the number one frustration when you grow cilantro in a greenhouse.
It happens when temperatures climb above 75°F or when the plant gets stressed.
Keep things cool and harvest often to delay it.
2. Powdery Mildew
Poor airflow in a greenhouse can lead to powdery mildew.
Vent regularly and avoid getting water on the leaves when you grow cilantro in a greenhouse.
3. Aphids and Whiteflies
These tiny pests love greenhouse conditions.
Check your plants often and use insecticidal soap or neem oil if needed.
Harvesting Cilantro Grown in a Greenhouse
The best part of learning how to grow cilantro in a greenhouse is the harvest.
Start snipping outer leaves once the plant is about six inches tall.
Always cut from the outside in, and never take more than a third of the plant at once.
This keeps your cilantro growing in a greenhouse for weeks or even months.
So, How to Grow Cilantro in a Greenhouse?
You can grow cilantro in a greenhouse by keeping temperatures cool, providing bright light, and watering consistently.
It’s one of the easiest herbs to grow in a greenhouse once you understand what it needs.
From choosing the right soil to harvesting your leaves, growing cilantro in a greenhouse gives you fresh flavor all year long.
Hope this post has helped you learn how to grow cilantro in a greenhouse and inspired you to give it a try.