Cress microgreens are one of the quickest and easiest microgreens to grow. They produce tender green seedlings with a fresh, peppery flavour and can often be harvested in approximately 7–10 days.
Garden cress, Lepidium sativum, belongs to the mustard family and has the slightly spicy, sharp flavour commonly associated with brassica greens. Its compact growth and short crop cycle make it particularly suitable for beginners, windowsill growing and small indoor spaces.
Cress seed behaves differently from many larger microgreen seeds. When it becomes wet, it develops a clear gelatinous coating called mucilage. For this reason, cress seeds should generally not be pre-soaked. Sow them dry onto a moist growing surface and then mist gently.
Shop Cress Microgreen Seeds from Seedmart Australia, available in packet and bulk quantities.
Cress Microgreens at a Glance
| Growing Factor | Recommendation |
|---|---|
| Botanical name | Lepidium sativum |
| Common names | Garden cress, curled cress, peppergrass |
| Days to harvest | Approximately 7–10 days, depending on conditions and preferred stage |
| Seed soaking | Do not pre-soak – seed becomes mucilaginous when wet |
| Germination | Approximately 2–4 days |
| Covered germination | Approximately 2–3 days, or until seedlings are established |
| Growing medium | Soil, seed-raising mix, coco coir, hemp mat or moist paper towel for small crops |
| Flavour | Fresh, peppery and mildly spicy |
| Difficulty | Easy – suitable for beginners |
What Are Cress Microgreens?
Cress microgreens are the young seedlings of garden cress, Lepidium sativum, harvested shortly after germination while the stems and cotyledons are still tender.
Garden cress belongs to the Brassicaceae or mustard family, the same broad plant family as broccoli, kale, radish and mustard.
This helps explain its characteristic peppery flavour. Even when harvested young, cress has a noticeably sharper taste than mild microgreens such as broccoli or red cabbage.
Cress grows quickly, requires little space and can be grown in shallow trays indoors. It is also one of the few microgreens that can be grown easily on simple moist paper towel for a small home crop.
Why Grow Cress Microgreens?
- Very fast-growing microgreen with a short crop cycle.
- Fresh, peppery flavour with a mild mustard-like bite.
- Suitable for beginners and first-time microgreen growers.
- Can be grown indoors throughout the year under suitable conditions.
- Compact crop suitable for windowsills and small spaces.
- Can be grown in soil, coco coir, hemp growing mats or on moist paper towel.
- No pre-soaking required.
- Useful in salads, sandwiches, wraps and garnishes.
- Suitable for home and commercial microgreen production.
Cress is also widely used in microgreen research. Recent studies have examined Lepidium sativum for seed-density optimisation, yield and indoor production, confirming its usefulness as a fast-growing controlled-environment crop.
View recent research involving cress microgreens.
How to Grow Cress Microgreens in 7 Simple Steps
- Prepare the tray. Add approximately 2–4 cm of moist soil, seed-raising mix or coco coir to a shallow tray and level the surface.
- Sow the cress seeds dry. Do not pre-soak them. Scatter the seed evenly across the growing surface without creating thick piles.
- Mist gently. Thoroughly moisten the seed using a fine spray bottle. The seeds will develop a clear gelatinous coating after absorbing water.
- Cover during germination. Cover the tray with another tray or suitable lid for approximately 2–3 days while the seedlings establish.
- Introduce light. Once the seedlings have emerged, remove the cover and place the tray in bright natural light or under a suitable grow light.
- Water carefully. Keep the growing medium evenly moist without leaving the roots sitting in standing water. Bottom watering is useful once roots establish.
- Harvest. Cress microgreens are commonly ready in approximately 7–10 days. Cut cleanly just above the growing medium.
What You Need to Grow Cress Microgreens
- Cress Microgreen Seeds
- A shallow growing tray with drainage
- A solid lower tray for bottom watering
- Quality seed-raising mix, soil, coco coir or suitable growing mat
- A second tray or suitable cover
- A fine spray mister
- Clean water
- Bright natural light or a suitable grow light
- Clean scissors or a harvesting knife
Step 1: Prepare the Growing Tray
Add approximately 2–4 cm of growing medium to a shallow microgreen tray.
A fine quality seed-raising mix, potting mix or coco coir works well. Moisten it before sowing and gently level the surface.
The growing medium should feel evenly moist but should not be saturated.
Cress has fine roots and grows quickly, so a deep layer of soil is unnecessary for microgreen production.
Step 2: Do Not Pre-Soak Cress Seeds
Cress is a mucilaginous seed.
When the seed comes into contact with water, it quickly develops a clear, sticky gelatinous layer around its surface.
This is a normal biological feature of cress seed and is not a sign of mould or spoilage.
Because hydrated cress seeds become difficult to separate, they should generally be sown dry and watered after they have been distributed across the growing surface.
Step 3: Sow the Cress Seeds Evenly
Scatter the dry seeds evenly over the prepared growing surface.
Cress is a small seed, so a surprisingly small amount can cover a large area. Avoid pouring the seed heavily into one section of the tray.
Aim for a reasonably dense, even layer without large piles of overlapping seed.
Seed density matters because extremely dense sowing can reduce airflow around the developing stems and create consistently wet areas within the crop.
Recent microgreen research on cress has also demonstrated that increasing seed density can increase crop yield only up to a point, while excessively dense crops may also increase microbial load.
For this reason, even coverage is generally more important than trying to fit the maximum possible number of seeds into a tray.
Step 4: Mist and Cover for Germination
After sowing, use a fine spray bottle to moisten the seeds thoroughly.
Once wet, the seeds will become slightly sticky and tend to remain where they have been sown.
Cover the tray with another tray or a suitable lid to help maintain consistent humidity during early germination.
Cress germinates rapidly, commonly within approximately 2–4 days.
Check the tray daily to make sure the growing surface remains moist.
Avoid flooding the tray. Saturated growing media and standing water can encourage fungal problems.
Step 5: When to Uncover Cress Microgreens
Once the seedlings have emerged and are beginning to push upward, remove the germination cover.
This will commonly occur within approximately 2–3 days under suitable conditions.
Move the tray into bright natural light or beneath a suitable grow light.
Good light encourages greener cotyledons and helps produce compact, upright growth.
If cress seedlings become unusually tall, pale or stretched, insufficient light may be contributing to the problem.
Step 6: How to Water Cress Microgreens
Cress grows rapidly and should not be allowed to dry out completely.
At the same time, the crop does not benefit from continually saturated conditions.
During early germination, use a gentle spray mister where necessary.
Once the roots have grown through the medium, bottom watering is useful.
Add a small amount of water to the solid lower tray and allow the growing medium to absorb it through the drainage holes.
This reduces disturbance to the crop and helps keep the foliage relatively dry.
Step 7: When to Harvest Cress Microgreens
Cress microgreens are commonly ready for harvest in approximately 7–10 days.
The exact harvest time depends on temperature, light, growing density and the stage you prefer.
Harvest when the seedlings have developed healthy green cotyledons and reached a useful height.
Use clean scissors or a sharp harvesting knife and cut the stems just above the growing medium.
Avoid cutting into soil or pulling up roots if you want a clean harvested crop.
How to Grow Cress Without Soil
One useful feature of cress is that small crops can be grown without conventional soil.
The older Seedmart growing method uses moist paper towels, which remains a practical option for simple home-grown cress.
Paper Towel Method
- Place several layers of paper towel onto a shallow tray, plate or saucer.
- Moisten the paper thoroughly and drain any excess water.
- Scatter dry cress seed evenly across the surface.
- Mist the seed gently with clean water.
- Keep the paper consistently moist but not waterlogged.
- Provide light after germination.
- Harvest once the seedlings have developed to the stage you prefer.
This method works particularly well for a small windowsill crop. For larger or repeated crops, soil, coir or purpose-made microgreen mats are generally easier to manage.
What Do Cress Microgreens Taste Like?
Cress microgreens have a fresh, peppery and mildly spicy flavour.
The flavour is somewhat similar to mustard and radish, although garden cress has its own distinctive sharp character.
Because of this strong flavour, a relatively small quantity can add noticeable bite to otherwise mild foods.
How to Use Cress Microgreens
Cress is traditionally used fresh, and microgreens are particularly suitable for cold dishes and garnishes.
- Add to sandwiches and rolls.
- Mix into salads.
- Use in wraps.
- Sprinkle over eggs.
- Add to avocado toast.
- Use on soups immediately before serving.
- Add to potato dishes.
- Combine with milder microgreens in salad mixes.
- Use as a fresh restaurant garnish.
- Add to savoury breakfast dishes.
Cress microgreens are generally best added just before serving so their crisp texture and fresh peppery flavour are preserved.
Cress Microgreens vs Radish Microgreens
Cress and radish both belong to the Brassicaceae family and share a peppery flavour, but they differ considerably in seed size, texture and growing behaviour.
| Feature | Cress Microgreens | Radish Microgreens |
|---|---|---|
| Botanical name | Lepidium sativum | Raphanus sativus |
| Flavour | Peppery, sharp and mustard-like | Peppery and distinctly radish-like |
| Seed type | Small and mucilaginous | Larger, non-mucilaginous seed |
| Typical harvest | Approximately 7–10 days | Approximately 7–10 days |
| Growing style | Can be grown on soil, mats or paper towel | Usually grown in soil, coir or growing mats |
Cress Microgreens vs Watercress
Garden cress and watercress are often confused, but they are different plants with different growing requirements.
| Feature | Garden Cress | Watercress |
|---|---|---|
| Botanical name | Lepidium sativum | Nasturtium officinale |
| Growth habit | Terrestrial annual herb | Semi-aquatic plant |
| Microgreen growing | Very suitable for shallow trays | Requires different moisture management |
| Flavour | Peppery and sharp | Peppery with characteristic watercress flavour |
If you are growing Seedmart’s Cress Microgreen Seeds, you are growing garden cress (Lepidium sativum), not watercress.
Why Are Cress Seeds Slimy After Watering?
The clear or jelly-like coating that forms around cress seeds is called mucilage.
This coating develops naturally when the seed absorbs water.
It helps retain moisture around the seed during germination, but it also means wet cress seeds become sticky and difficult to spread.
This is why cress is best sown dry.
The mucilage itself is not mould. Mould is more likely to appear as abnormal fuzzy growth, particularly where air circulation is poor or the growing medium remains excessively wet.
Growing Cress Microgreens in Australia
Cress can be grown indoors throughout the year, making it useful across a wide range of Australian climates.
Because the crop develops very quickly, maintaining appropriate moisture and airflow is more important than following a strict outdoor planting calendar.
In warmer and more humid areas such as Brisbane, trays can dry quickly in hot conditions but may also remain too wet where airflow is poor.
During warm or humid weather:
- Do not oversow the tray.
- Provide good airflow after germination.
- Avoid leaving water standing in the bottom tray.
- Bottom water established crops where practical.
- Keep trays out of intense direct afternoon sun.
- Check moisture before adding more water.
Common Cress Microgreen Growing Problems
The Seeds Look Slimy or Jelly-Like
This is normal.
Cress seed produces mucilage when wet. The clear gelatinous coating surrounding the seed should not automatically be mistaken for mould.
Cress Is Growing Unevenly
Uneven growth can result from uneven seed distribution, inconsistent moisture or poor contact between the seed and growing surface.
Try to sow dry seed evenly before misting. Once the seed becomes wet and sticky, moving it becomes more difficult.
Cress Seedlings Are Falling Over
Fine seedlings can be damaged by heavy overhead watering.
Use a fine mist during early growth and switch to bottom watering once roots are established.
Cress Is Tall and Pale
This usually indicates that the crop needs more light or has remained covered for too long.
Once germination is established, uncover the tray and provide adequate natural or artificial growing light.
Mould Is Developing
Excessive seed density, poor airflow and saturated growing media can contribute to mould.
Reduce watering, improve ventilation, avoid standing water and make sure future trays are not sown excessively densely.
The Paper Towel Is Drying Out
Paper towel holds much less water than soil or coir and can dry quickly.
Check it frequently and mist gently as required.
It should remain moist, but water should not pool around the seed.
Can Cress Microgreens Be Grown Indoors?
Yes. Cress is particularly well suited to indoor growing because it requires little space and has a very short crop cycle.
Small trays can be grown on a bright windowsill, kitchen bench or balcony where sufficient light is available.
For more consistent production, particularly where natural light is limited, a suitable grow light can be used after germination.
For broader information about growing trays, lighting, watering, blackout and growing media, see Seedmart’s complete guide to growing microgreens.
Frequently Asked Questions
How long do cress microgreens take to grow?
Cress microgreens are commonly ready approximately 7–10 days after sowing. Some growers may harvest slightly earlier or later depending on growing conditions and preferred crop stage.
How long does cress take to germinate?
Cress commonly germinates in approximately 2–4 days under suitable conditions.
Do cress microgreen seeds need to be soaked?
No. Cress should generally not be soaked before sowing because the seeds produce sticky mucilage when wet.
Why do cress seeds become slimy?
Cress seeds naturally form a gelatinous coating called mucilage after absorbing water. This is a normal feature of the seed.
Can cress microgreens be grown on paper towel?
Yes. For small home crops, cress can be grown on several layers of moist paper towel. Keep the paper moist but not waterlogged throughout germination and growth.
Can cress microgreens be grown without soil?
Yes. Cress can be grown on paper towel, coco coir, hemp growing mats and other suitable soilless media.
Do cress microgreens need blackout?
Cress benefits from being covered during the initial germination period. Once seedlings emerge and begin growing upward, remove the cover and provide suitable light.
Do cress microgreens need light?
Yes. After germination, cress needs suitable natural or artificial growing light to produce healthy green growth.
What do cress microgreens taste like?
Cress has a fresh, sharp and peppery flavour with a mild mustard-like character.
When should I harvest cress microgreens?
Harvest is commonly around 7–10 days after sowing once the seedlings are healthy, green and have developed their cotyledons.
Is garden cress the same as watercress?
No. Garden cress is Lepidium sativum, while watercress is Nasturtium officinale. They are different species with different growth habits.
Can cress microgreens be grown in summer?
Yes, particularly indoors where conditions can be controlled. During hot or humid weather, keep trays out of extreme heat and provide sufficient airflow.
Where can I buy cress microgreen seeds in Australia?
Seedmart supplies Cress Microgreen Seeds in packet and bulk quantities for home growers, chefs and commercial microgreen production throughout Australia.
Cress is an excellent microgreen for beginners because it germinates quickly, requires little space and can be harvested in around a week.
The main technique to remember is simple: do not soak cress seed. Sow it dry onto a moist growing surface, mist gently, cover during early germination and move the seedlings into good light once they have emerged.
Keep the growing medium consistently moist without waterlogging it, provide adequate airflow and harvest once the crop has developed healthy green cotyledons.
Shop Cress Microgreen Seeds from Seedmart Australia.