How to grow chervil (beginner-friendly guide)

Most chervil failures happen at the seed stage, and the cause is almost always the same: the seed was buried. Chervil needs light to germinate, so seed covered with a layer of soil often never comes up at all.^[1] Sow it on the surface and press it in, and the rest of the plant is straightforward.

What chervil is, and why you have to grow it yourself

Chervil (Anthriscus cerefolium) is one of the four fines herbes of French cooking, alongside parsley, tarragon and chives. Its flavor is mild and faintly of aniseed, and it is destroyed by heat, so it goes into eggs, fish and sauces at the very end.

It is also almost impossible to buy. The leaves wilt within a day or two of cutting, which is why supermarkets do not stock it and why growing your own is the only realistic way to cook with it.

Most references, including Illinois Extension, classify it as an annual.^[1] You will see it called a biennial elsewhere, because in mild climates a fall sowing will overwinter and flower the following spring. For practical purposes treat it as an annual: it grows, it flowers, the flavor goes, and you sow again.

In USDA hardiness zones 3 to 7 you can grow chervil for most of the year. In zone 8 and warmer it is a spring, fall and winter crop, because summer heat will bolt it.

Sowing chervil

Do not bury the seed. This is the single most common mistake. Chervil needs light to germinate. Scatter the seed on the surface of moist soil and either leave it uncovered or dust it with the barest sprinkle of soil, then press it down so it makes firm contact.^[1]

Sow direct, in the pot or bed where the plant will live. Chervil grows a taproot and, like its relatives carrot and parsley, transplants badly. UC Master Gardeners make the same point: seedlings are difficult to move successfully.^[2]

Seed germinates at 60–65°F (15–18°C) in 7 to 14 days, and cooler soil is slower. Keep the surface consistently moist through germination, which for surface-sown seed means misting rather than pouring.

Space seeds 3–4 inches (8–10 cm) apart in containers, or 9–12 inches (23–30 cm) apart in the ground. Thin to one plant per 8-inch pot, or three per 12-inch pot, once seedlings reach about 3 inches.

Sow a fresh batch every three to four weeks. This is not optional if you want a continuous supply, because each sowing bolts eventually.

Containers and soil

Chervil’s taproot needs depth. Use a container at least 10 inches (25 cm) deep and 8 inches (20 cm) wide. A shallow herb trough produces a stunted plant that bolts early.

Choose a glazed ceramic or plastic pot rather than terracotta. Terracotta is porous and wicks moisture out through its walls, which suits rosemary and lavender and works against a plant that wants to stay damp. Whatever you use needs drainage holes.

For soil, pick something with high water retention. A commercial mix for moisture-loving plants works, or add extra coconut coir or peat moss to ordinary potting soil. Our growing media guide covers the tradeoffs.

Light, water and temperature

Chervil is one of the few culinary herbs that genuinely prefers partial shade. An east- or north-facing window suits it, and a hot south-facing sill will bolt it. This makes it a useful companion to the other herbs that tolerate low light.

Keep the soil moist but never waterlogged. Test with a finger: if the top half-inch is dry, water. Drought turns the leaves bitter and can kill the plant outright, and chervil does not recover from wilting as forgivingly as mint does.

Cool is the target: 60–70°F. Sustained warmth above about 75°F triggers bolting regardless of how well you water.

Go easy on fertilizer. A single application of slow-release feed at planting is enough. Overfeeding produces bigger leaves with noticeably less flavor, the same tradeoff described in our herb fertilizer guide.

Growing chervil as a microgreen

Chervil works as a microgreen, and it sidesteps the taproot and bolting problems entirely because you harvest before either matters.

1. Fill a tray with about an inch (2.5 cm) of moistened coconut coir.
2. Spread the seed evenly across the surface.
3. Press the seed into the coir. Do not bury it.
4. Cover with a humidity dome, or cling film with a few holes poked in it.
5. Mist daily. Surface-sown seed dries out fast on a windowsill.

Remove the dome once the seed sprouts and move the tray somewhere it gets 3 to 4 hours of sun. Harvest by cutting just above the coir line. Our microgreens guide covers the method in more depth.

Harvesting

Start cutting 30 to 60 days after sprouting, once plants are at least 6 inches (15 cm) tall. Take the outer leaves first and leave the center growing.

Flavor is best in young leaves, and it fades as the plant ages and disappears once it flowers. Use chervil fresh; it loses most of its aroma when dried, which is why it does not appear in our drying guide as a good candidate.

Troubleshooting

Nothing germinated. Almost always buried seed. Chervil needs light to sprout. Re-sow on the surface, press in, and mist rather than water from a can, which washes fine seed around and buries it.

The plant shot up a flower stalk and the leaves turned bitter. That is bolting, triggered by heat or by drought stress. Nothing reverses it. Pinch flower buds out as soon as you see them to buy a couple of weeks, then pull the plant and sow again. Our guide to bolting explains the mechanism.

Leaves are pale and the plant is stretched. Too little light, which is unusual for chervil but happens in a genuinely dark corner. Move it to a brighter spot out of direct midday sun.

Leaves taste of nothing. Overfeeding, or an old plant past its best. Stop fertilizing and start a fresh sowing.

The plant collapsed after being moved. Transplant shock. The taproot does not tolerate disturbance, which is why direct sowing matters.

Varieties

Beyond plain flat-leaved chervil, two cultivars are widely sold:

• Crispum. Curled green leaves, milder than plain chervil. Decorative, less useful in the kitchen.
• Vertissimo, sold as Brussels Winter. Flat, lacy, dark green leaves that handle cold better and are slower to bolt. The one to pick for a fall sowing or an unheated room.

Chervil vs. parsley

They are related and look similar, and they do not taste alike. Chervil is mild and aniseed-ish; parsley is grassier and more peppery. Chervil wants shade and cool; parsley takes more sun and is far more heat-tolerant.

Both grow a taproot, both resent transplanting, and both are slow from seed. If you can only grow one, parsley is the more useful all-rounder and chervil is the one you cannot buy.

Questions & answers

Is chervil easy to grow?

Yes, once the seed is sown correctly. The one thing that catches people out is burying the seed, which prevents germination because chervil needs light to sprout. After that it is undemanding, provided it stays cool and moist.

Can chervil be grown in pots?

Yes. Use a pot at least 10 inches (25 cm) deep to accommodate the taproot, in glazed ceramic or plastic rather than terracotta, since chervil wants the soil to stay damp.

Is chervil annual or perennial?

Neither, strictly. Chervil is normally classified as a cool-season annual. In mild climates a fall sowing can overwinter and flower the following spring, which is why it is sometimes called a biennial. Either way you sow it fresh each season.

Why is my chervil not germinating?

The most likely cause is that the seed was covered with soil. Chervil requires light to germinate, so it should be surface-sown and pressed in rather than buried. Letting the surface dry out during germination is the second most common cause.

How long does chervil take to grow?

Germination takes 7 to 14 days at 60–65°F. Plants reach harvestable size 30 to 60 days after sprouting.

How big is chervil?

Plain and crispum chervil reach 1–2 feet (30–60 cm) tall; vertissimo usually reaches 2 feet (60 cm). Individual plants spread 6–12 inches (15–30 cm).

Why does my chervil keep bolting?

Heat is the usual trigger, and drought stress is the second. Chervil is a cool-season plant and will flower once temperatures stay above roughly 75°F. Keep it out of direct midday sun, never let it dry out, and sow a fresh batch every three to four weeks so you always have a young plant coming on.

Chervil is one of the four fines herbes, added at the last moment to poultry, fish and eggs. If you want to grow the full set:

References

1. University of Illinois Extension, “Chervil,” Herb Gardening. https://extension.illinois.edu/herbs/chervil ↩︎ ↩︎ ↩︎

2. UC Master Gardeners of Santa Clara County, “Chervil.” https://ucanr.edu/site/uc-master-gardeners-santa-clara-county/chervil ↩︎