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Your cilantro is yellowing because the plant is stressed, and that stress usually comes from one of a handful of fixable problems.
Cilantro leaves turn yellow when the plant is overwatered, underwatered, too hot, or lacking key nutrients.
The good news is that once you figure out which of these is causing your cilantro to yellow, you can usually bring it back to health.
In this post, we’ll walk through the most common reasons your cilantro is yellowing and exactly how to fix each one.
Let’s dig in.
Why Your Cilantro Is Yellowing
Cilantro yellowing is your plant’s way of telling you something is off with its growing conditions.
Unlike some herbs that hide their problems, cilantro shows stress right on its leaves.
Once you understand the cause, fixing yellowing cilantro becomes pretty straightforward.
Here are the main reasons your cilantro plant is turning yellow.
1. Overwatering Is the Number One Cause
If your cilantro is yellowing, overwatering is the first thing to check.
Cilantro likes soil that drains well, and soggy roots can’t take up oxygen properly.
When roots sit in waterlogged soil, they suffocate, and the leaves start turning yellow as a result.
Yellowing cilantro from overwatering often starts with the lower leaves first.
The fix is simple: let the top inch of soil dry out before you water again.
If your cilantro is in a pot, make sure it has drainage holes so excess water can escape.
2. Underwatering Stresses the Plant Too
On the flip side, cilantro will also yellow when it’s not getting enough water.
When the soil stays too dry, the plant can’t move nutrients through its system, and the leaves fade to yellow.
You’ll usually notice dry, crispy edges along with the yellowing when water is the issue.
Check the soil with your finger, and if it’s bone dry a couple of inches down, give your cilantro a good soak.
3. Too Much Heat and Direct Sun
Cilantro is a cool-season herb, and it genuinely hates the heat.
When temperatures climb above 75°F, cilantro starts to bolt and the leaves can yellow as the plant struggles.
If your cilantro is yellowing during a hot summer, heat stress is likely part of the problem.
Move your cilantro to a spot with morning sun and afternoon shade to keep it cooler.
4. Nutrient Deficiencies Show Up as Yellow Leaves
A lack of nitrogen is one of the most common reasons cilantro leaves turn yellow.
Nitrogen is essential for green, healthy foliage, and without it, the leaves lose their color.
Yellowing cilantro from a nitrogen deficiency usually starts with older leaves turning pale first.
Feed your cilantro with a balanced liquid fertilizer every few weeks to keep it green and growing.
How to Fix Yellowing Cilantro
Fixing yellowing cilantro starts with figuring out which of the above issues is hurting your plant.
Once you know the cause, the solution is usually quick and easy.
Here’s how to bring your cilantro back to a healthy green.
1. Adjust Your Watering Schedule
Water your cilantro deeply but less often, letting the soil dry slightly between waterings.
This keeps the roots happy and prevents the yellowing that comes from both extremes.
2. Improve Drainage in Pots and Beds
If your cilantro is in a pot, make sure the drainage holes aren’t blocked.
For garden beds, mix in some compost to help the soil drain better and keep your cilantro from yellowing.
3. Provide Afternoon Shade
Give your cilantro a break from intense afternoon sun, especially in warmer climates.
A little shade goes a long way toward stopping cilantro from turning yellow.
4. Feed With a Balanced Fertilizer
A dose of balanced fertilizer every two to three weeks keeps nutrients available so your cilantro stays green.
Don’t overdo it, though, because too much fertilizer can burn the roots and cause more yellowing.
So, Why Is Your Cilantro Yellowing?
Your cilantro is yellowing because of stress from overwatering, underwatering, heat, or a lack of nutrients.
The good news is that yellowing cilantro is usually fixable once you correct the growing conditions.
Check your watering habits, improve drainage, provide some shade, and feed your plant regularly.
Do that, and your cilantro will reward you with fresh, green leaves again in no time.