Curled cress microgreens are one of the fastest, easiest greens you can grow. These fine, frilly seedlings pack a bright, peppery, tangy bite that wakes up salads, sandwiches, and avocado toast. There's no soaking and no special equipment: just sow the seeds dry on a shallow tray, keep them moist, and you'll be harvesting tender greens in about a week. Best of all, they grow indoors year-round, right on a sunny windowsill.
Best tip
The single most important thing with curled cress is do not soak the seeds. Cress is mucilaginous, so soaking turns it into a sticky gel that clumps and rots. Sow the seeds dry and evenly on a moist medium, mist the surface, and keep watering gentle. That's it. You need no special equipment at all: a shallow tray, a fine growing medium, water, and a bright windowsill are enough to grow a full tray of peppery cress in about a week.
At a glance
Botanical nameLepidium sativum
Plant typeMicrogreen
SunBright light or grow light (after blackout)
Days to maturity6 to 12 days
Height1.5 to 2 in
WaterBottom-water; keep evenly moist
When to plant
Curled cress grows indoors year-round, so you're never waiting on a season. Aim for a room around 65 to 75F, which is comfortable house temperature, and set the tray on a bright windowsill or under a grow light once it has sprouted. Because cress is so fast, starting a fresh tray every few days keeps a steady supply of tender greens coming with almost no effort.
How to plant
Fill a shallow tray with an inch or two of moistened seed-starting mix or coconut coir and level the surface. Do not soak curled cress seeds: they gel when wet, so sow them dry, sprinkling them densely and evenly across the surface with minimal overlap and without burying them. Mist well to settle the seeds, then cover the tray or set it in the dark for 2 to 3 days to germinate. Once the seeds have sprouted, uncover the tray and move it into bright light. Cress can be grown in a jar as a sprout, but the gel makes rinsing messy, so a tray gives far better microgreens.
Sow curled cress seeds dry (never soaked) on a moist tray.
Growing and care
After the seeds sprout, water from the bottom or gently around the edges so the delicate foliage stays dry, which is the best way to avoid mold on such a fine crop. Give the tray 10 to 16 hours of bright light a day, keep good airflow around it, and hold the temperature around 65 to 75F. Keep the medium evenly moist but never soggy, and keep everything clean, since cress is quick but delicate and dislikes standing water.
The most common beginner worry is mistaking root hairs for mold. A halo of fine white fuzz right around the stems near the seeds is normal root hairs and will vanish when you mist. Real mold is slimy or web-like, spreads across the soil surface, and smells sour. If that appears, improve airflow, water less, and sow more thinly next time.
Harvest
Curled cress is ready fast, usually in about 6 to 12 days, once the greens reach 1.5 to 2 inches tall and the leaves are open and tender. Cut just above the soil line with clean scissors, taking the whole tray at once. Cress does not regrow after cutting, so compost the roots and mix and start a fresh sowing. For storage, keep the harvested greens dry and unwashed in an airtight container in the fridge, and rinse only right before use.
Uses
Curled cress has a bright, peppery, tangy, zesty bite that wakes up almost any dish. Scatter it over avocado toast, tuck it into sandwiches and wraps, fold it into egg and potato salads, or use it as a fresh garnish on soups and grain bowls. Like other microgreens it is nutrient-dense, packing concentrated vitamins and minerals into tiny leaves, so a small handful adds both flavor and nutrition.
Peppery curled cress adds a zesty bite to avocado toast.
Common problems
Mold vs. root hairs: fine white fuzz clustered on the stems near the seeds is normal root hairs and disappears when misted. Slimy or cobweb-like growth spreading across the soil with a sour smell is mold; improve airflow, water less, and sow thinner.
Damping off: seedlings collapse at the base in cool, damp, stagnant air. Use clean trays, good airflow, and avoid overwatering.
Leggy or pale greens: too little light. Move the tray to a brighter spot or add a grow light for 10 to 16 hours a day.
Uneven germination: usually from uneven sowing or moisture. Spread the dry seed evenly and mist so the whole surface stays consistently damp.
Clumping and gelling: caused by soaking or overwatering cress. Sow dry and water gently to keep the seeds from sticking together.
Seed hulls stuck on leaves: mist and give a gentle rub, or use a light weighted cover during blackout to help hulls drop off.
Frequently asked questions
Do I need to soak curled cress seeds before sowing?
No. Curled cress seeds are mucilaginous, which means they form a natural gel when wet. Sow them dry and simply mist the surface. Soaking makes them clump into a sticky mass and is never necessary.
How long do cress microgreens take to grow?
Curled cress is one of the fastest microgreens. Most trays are ready to harvest in about 6 to 12 days from sowing, when the greens reach 1.5 to 2 inches tall.
Is that white fuzz on my cress mold or root hairs?
Fine white fuzz clustered around the stems near the seeds is almost always root hairs, which are normal and disappear when misted. Mold looks different: it is slimy or cobweb-like, spreads across the soil surface, and often smells sour. If you see that, improve airflow, water less, and sow a little thinner next time.
Do cress microgreens regrow after harvesting?
No. Like most microgreens, curled cress does not regrow once cut. Harvest the whole tray, then compost the roots and mix and start a fresh sowing. Because cress grows so quickly, a new tray is only about a week away.
How much light do cress microgreens need?
After a short 2 to 3 day covered germination period, uncover the tray and give the greens bright light, either a sunny windowsill or a grow light for about 10 to 16 hours a day. Good light keeps the stems short and the color deep green rather than pale and leggy.
Should I grow cress in a jar or a tray?
Use a shallow tray. Because cress seeds gel when wet, they do not rinse and drain cleanly in a sprouting jar, so the tray method with a fine growing medium gives far better, more reliable microgreens.
Ready to grow your own curled cress microgreens? Grab a packet of our non-GMO curled cress seeds and enjoy fresh, peppery greens in about a week, right on your windowsill.
Cress Sprouting & Microgreens Seeds 1lbNon-GMO, heirloomNon-GMO curled cress microgreen & sprouting seeds - fast, peppery greens in about a week.$21.99$19.99
Maxim founded Organo Republic in 2017 and personally selects, tests, and grows the heirloom, non-GMO varieties the company offers. Under his leadership, Organo Republic was named Agri Business Review’s Top Non-GMO Seed Variety Solution 2026.
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