Kale Red Russian microgreens are fast-growing brassica microgreens with tender green leaves, reddish-purple stems and a mild kale flavour. They are easy to grow in shallow trays and are a good choice for beginners who want to produce fresh microgreens indoors.
If you’re wondering how to grow Kale Red Russian microgreens, you do not need a garden or complicated equipment. With quality Kale Red Russian microgreen seeds, a shallow tray, growing medium, light and regular watering, you can usually harvest a crop in around 8–14 days.
This beginner-friendly guide explains how to grow Red Russian Kale microgreens at home, including how much seed to use, the best growing medium, blackout time, temperature, watering, lighting, harvesting and common growing problems.
Kale Red Russian Microgreens at a Glance
What Are Kale Red Russian Microgreens?
Kale Red Russian microgreens are the young seedlings of Red Russian Kale, a leafy brassica variety also known as Ragged Jack.
They are harvested shortly after germination, when the cotyledons have fully opened or as the first true leaves begin to appear.
Red Russian Kale microgreens typically produce green leaves with pink, red or purple stems and leaf margins. As the plants mature, the characteristic serrated and frilled foliage of Red Russian Kale becomes more obvious.
Their flavour is mild, fresh and slightly brassica-like, making them suitable for people who prefer a less pungent microgreen than mustard or radish.
What Do Kale Red Russian Microgreens Taste Like?
Kale Red Russian microgreens have a mild kale and brassica flavour with a fresh, slightly sweet character.
They are milder than mustard, radish and many spicy microgreens, which makes them useful as either a single crop or as part of a mixed microgreen tray.
Try them:
- In salads
- On sandwiches and wraps
- On avocado toast
- With eggs and omelettes
- In grain bowls
- As a garnish
- With roasted vegetables
- Mixed with stronger-flavoured microgreens
Why Grow Kale Red Russian Microgreens?
Red Russian Kale is a useful variety for home microgreen growers because it germinates quickly, requires no seed soaking and produces attractive green seedlings with reddish-purple colouring.
- Usually ready to harvest in under two weeks
- No seed soaking required
- Suitable for beginners
- Can be grown indoors
- Suitable for small spaces
- Mild flavour
- Attractive purple, pink and green colouring
- Suitable for soil and hydroponic growing methods
- Can be grown throughout the year indoors
Research on Brassica microgreens has also shown that kale microgreens can achieve high germination rates under controlled growing conditions.
How to Grow Kale Red Russian Microgreens in 7 Simple Steps
- Prepare a clean shallow growing tray.
- Sow Kale Red Russian seeds evenly over the growing medium.
- Mist the seeds and cover the tray for approximately 2–3 days.
- Remove the cover after germination and expose the seedlings to bright light.
- Water regularly, preferably from underneath once the roots are established.
- Allow the microgreens to grow until the cotyledons are fully open.
- Harvest with clean scissors, usually around 8–14 days after sowing.
The exact harvest time depends on temperature, light, crop density and whether you prefer to harvest at the cotyledon stage or wait for the first true leaves to begin developing.
What You Need to Grow Kale Red Russian Microgreens at Home
- Kale Red Russian microgreen seeds
- A shallow growing tray with drainage holes
- A second tray or dark cover for germination
- Coco coir, fine potting mix, hemp mat or suitable hydroponic growing medium
- Spray bottle
- Clean water
- A bright windowsill or LED grow light
- Clean scissors for harvesting
You can also grow small trial batches in clean recycled containers such as food-grade takeaway containers or strawberry punnets, provided drainage and moisture can be managed properly.
The original Seedmart growing trial used a 500 mL takeaway container, showing that you do not need a full-sized commercial microgreen tray to get started.
Do Kale Red Russian Microgreen Seeds Need to Be Soaked?
No. Kale Red Russian microgreen seeds do not need to be soaked before sowing.
The seeds are relatively small and germinate readily when placed on a moist growing surface.
Pre-soaking is unnecessary and can make the small seeds harder to spread evenly.
Instead, sow the seeds dry and mist them thoroughly after planting.
How Much Kale Red Russian Seed Should You Use?
For a standard 10 x 20 inch microgreen tray, approximately 10 g of Kale Red Russian seed is a useful starting rate.
For a 10 x 10 inch tray, use approximately 5 g.
These rates provide good coverage without excessively overcrowding the seedlings.
A peer-reviewed study of Red Russian Kale microgreens used a sowing rate equivalent to approximately 10 g per 10 x 20 inch tray, and commercial microgreen trials have reported similar rates.
Avoid sowing too densely. Excessive seed density can:
- Reduce airflow through the crop
- Keep stems and growing medium excessively wet
- Increase mould and damping-off risk
- Cause seedlings to compete for light
- Produce uneven growth
For small containers, reduce the amount of seed proportionally according to the surface area.
Best Growing Medium for Kale Red Russian Microgreens
Kale Red Russian microgreens can be grown using several different media.
Coco Coir
Coco coir is an easy option for home growers because it holds moisture while remaining relatively light and easy for roots to penetrate.
Add approximately 2–3 cm of moist coco coir to the tray and level the surface before sowing.
Organic Potting or Seed-Raising Mix
A fine, good-quality organic potting mix or seed-raising mix can also work well.
Avoid mixes containing large chunks of bark or wood because the small kale seeds need good contact with the growing surface.
Hemp Growing Mats
Hemp growing mats provide a clean, convenient alternative to loose growing medium.
Wet the mat thoroughly before sowing and make sure it remains evenly moist while the roots become established.
Reusable and Hydroponic Growing Mats
Red Russian Kale can also be grown hydroponically on suitable reusable microgreen mats.
When growing without soil or coco coir, monitor moisture carefully because thin mats can dry more quickly than deeper growing media.
Best Temperature for Growing Kale Red Russian Microgreens
Red Russian Kale is a cool-season brassica, but microgreens are harvested so young that they can be grown successfully under normal mild indoor conditions.
A useful target is approximately 18–24°C.
Research on kale microgreens has successfully grown them under controlled temperatures around the low 20s Celsius after emergence.
Very warm, humid conditions can increase the risk of mould and cause trays to dry irregularly, particularly where airflow is poor.
In warm climates such as Brisbane:
- Maintain good airflow around the tray
- Avoid overwatering
- Keep trays away from hot afternoon sun through glass
- Do not overcrowd the seeds
- Check the tray more frequently during hot weather
- Keep the foliage as dry as practical once seedlings are established
Step 1: Prepare Your Tray
Start with a clean shallow tray.
If you are using coco coir or potting mix, add approximately 2–3 cm of moist growing medium and level the surface.
The medium should feel evenly damp, similar to a wrung-out sponge, but should not be saturated.
If you are using a hemp or reusable growing mat, place it flat in the tray and moisten it thoroughly before sowing.
Cleaning trays and equipment between crops helps remove old roots and plant material that can contribute to mould and disease problems.
Step 2: Sow the Kale Red Russian Microgreen Seeds
Sprinkle the seeds evenly over the surface of the growing medium.
Try to create a fairly even single layer.
The seeds can sit close together because microgreens are intentionally grown densely, but avoid large piles of overlapping seed.
Do not soak the seeds before sowing.
After spreading the seed, gently press it against the growing medium to improve seed-to-medium contact.
Mist thoroughly with clean water.
Step 3: Blackout Period for Germination
Cover the tray with another tray, lid or dark cover.
Keep the Red Russian Kale seeds in blackout for approximately 2–3 days while they germinate.
Check the tray once or twice each day.
If the surface is starting to dry, mist lightly with water. Avoid saturating the tray.
The seeds usually begin germinating within approximately 2–3 days under suitable conditions.
Do Kale Microgreens Need Weight During Germination?
Heavy weighting is generally unnecessary for small kale seeds.
A cover or inverted tray is normally sufficient to provide darkness and maintain humidity while the seedlings germinate.
Good seed-to-medium contact is more important than applying heavy pressure.
Step 4: Expose the Kale Microgreens to Light
When most seeds have germinated and the shoots are pushing upwards, remove the blackout cover.
The young seedlings may initially be pale yellow or light green. This is normal after growing in darkness.
Move the tray into bright, indirect light or place it under a suitable grow light.
Within a short period, the cotyledons will become greener and Red Russian Kale will begin developing its characteristic reddish-purple and pink stem colouring.
If growing on a windowsill, rotate the tray regularly so the plants do not lean heavily in one direction.
Step 5: Water and Grow Your Kale Microgreens
Once the roots are established, bottom watering is generally preferable to repeatedly spraying water over the leaves.
Add a small amount of water to the bottom tray and allow the growing medium to draw moisture upwards.
Check the crop daily.
Most trays will need watering approximately once or twice per day, but watering frequency depends on:
- Temperature
- Humidity
- Airflow
- Tray size
- Growing medium
- Plant density
Do not water simply because a set number of hours has passed. Check the moisture in the growing medium first.
For best results:
- Keep the roots consistently moist
- Do not leave the growing medium waterlogged
- Maintain good airflow around the tray
- Avoid leaving the leaves continuously wet
- Provide consistent bright light
- Rotate windowsill-grown trays if necessary
Step 6: When to Harvest Kale Red Russian Microgreens
Kale Red Russian microgreens are usually ready to harvest approximately 8–14 days after sowing.
The exact timing depends partly on the stage you prefer.
Microgreens harvested at the cotyledon stage can be ready earlier, while crops allowed to develop their first true leaves may take closer to two weeks.
A peer-reviewed Red Russian Kale microgreen trial harvested the crop at around 10 days after planting, while commercial trials harvesting at the first true-leaf stage have taken approximately 13–14 days.
Look for:
- Fully opened cotyledons
- Healthy green leaves
- Pink, red or purple stem colouring
- Stems around 5–8 cm tall
- Good upright growth
- The beginning of true-leaf development if you prefer a later harvest
You do not have to wait for true leaves. Many growers harvest during the cotyledon stage for a tender, uniform crop.
Step 7: How to Harvest Kale Red Russian Microgreens
Use clean, sharp scissors to cut the stems just above the growing medium.
Do not pull the seedlings out by the roots, as this can bring soil, coco coir or other growing medium into the harvested greens.
You can cut the entire tray at once or harvest only what you plan to use immediately.
For the best texture, harvest while the microgreens are fresh, upright and crisp.
How Much Can You Harvest from One Tray?
The amount of Kale Red Russian microgreens you harvest will vary according to seed density, growing medium, temperature, light and harvest stage.
Rather than trying to maximise yield by sowing extremely densely, aim for a healthy crop with enough space for airflow.
A slightly less crowded tray is generally easier for a beginner to manage than a heavily seeded tray that remains damp and poorly ventilated.
How to Store Kale Red Russian Microgreens
If you are not eating your microgreens immediately, refrigerate them promptly after harvesting.
For best storage:
- Harvest with clean scissors
- Keep the microgreens as dry as possible
- Remove damaged seedlings
- Store in a clean airtight container
- Add paper towel to absorb excess moisture if needed
- Use within a few days for best freshness and texture
Avoid placing dripping-wet microgreens into a sealed container, as excess moisture can shorten their storage life.
How to Use Kale Red Russian Microgreens
The mild flavour of Red Russian Kale makes these microgreens easy to add to everyday meals.
Try them:
- In fresh salads
- On sandwiches and wraps
- On avocado toast
- With scrambled eggs and omelettes
- On burgers
- In rice and grain bowls
- With roasted vegetables
- As a fresh garnish
- Mixed with mustard, radish, broccoli or other microgreens
Because their flavour is relatively mild, Kale Red Russian microgreens are also useful for balancing stronger varieties in mixed microgreen trays.
Kale Red Russian vs Other Kale Microgreen Varieties
Several types of kale can be grown as microgreens, including Red Russian, Black Toscana and Scotch Curled kale.
The basic microgreen growing method is similar for these kale varieties, although germination speed, crop height and final appearance can vary between cultivars.
Red Russian is particularly attractive when you want contrasting stem colour in a microgreen mix.
Can You Grow Kale Red Russian Microgreens Without Soil?
Yes. Kale Red Russian microgreens can be grown without soil.
Suitable options include:
- Hemp growing mats
- Reusable microgreen mats
- Other suitable hydroponic growing media
A soil-free setup can make harvesting cleaner because there is less loose growing medium around the stems.
However, moisture control is important. Thin mats can dry faster than coco coir or potting mix, so check them regularly.
Growing Kale Red Russian Microgreens in Warm Weather
Red Russian Kale is a cool-season plant, but microgreens have such a short growing cycle that they can usually be grown indoors throughout the year.
The main challenge during hot or humid weather is not simply temperature—it is the combination of warmth, moisture, dense growth and poor airflow.
This is particularly relevant in subtropical areas such as Brisbane.
During warmer months:
- Maintain good airflow around the trays
- Do not oversaturate the growing medium
- Avoid excessively dense sowing
- Keep trays away from hot direct afternoon sun
- Bottom water once the roots are established
- Check trays frequently because shallow growing media can also dry quickly
Common Problems When Growing Kale Red Russian Microgreens
Mould on Kale Microgreens
Mould is commonly associated with excessive moisture, overcrowding and poor airflow.
To reduce the risk:
- Avoid overwatering
- Improve airflow around the tray
- Use clean equipment
- Make sure the tray can drain
- Reduce seed density if the crop is excessively crowded
Do not eat microgreens that are visibly mouldy or spoiled.
White Fuzz Around the Roots
Fine white fuzz concentrated around healthy roots can be root hairs rather than mould.
Root hairs usually appear evenly around the root zone and can become much less visible when watered.
Mould is more likely to spread irregularly over seeds, stems and growing medium and may continue expanding.
If you cannot confidently identify the growth, do not eat the affected crop.
Yellow Kale Microgreens
Yellow or pale seedlings immediately after blackout are normal.
The seedlings have been growing without light. Once placed in adequate light, they should begin developing normal green colouring.
Weak or Leggy Microgreens
Tall, thin seedlings that lean heavily towards a window usually need more light.
Move the tray into brighter light or use a suitable LED grow light.
Rotate windowsill trays regularly if light comes mainly from one direction.
Seed Hulls Stuck to the Leaves
Some seed hulls may remain attached to the cotyledons after germination.
They often fall away naturally as the leaves expand.
If loose hulls remain, you can gently brush your hand across the tops of established seedlings to dislodge them. Avoid damaging tender stems.
Microgreens Are Wilting
If the growing medium dries out, microgreens can wilt quickly because they have shallow root systems.
Check the tray and bottom water if the medium is dry.
In warm conditions, trays may need checking more than once each day.
Uneven Germination
Uneven germination can result from:
- Uneven moisture
- Poor seed-to-medium contact
- Seeds being piled in some areas
- The tray drying during germination
- Uneven temperature
Level your growing medium carefully, distribute the seed evenly and maintain consistent moisture during germination.
Frequently Asked Questions
How long do Kale Red Russian microgreens take to grow?
Kale Red Russian microgreens are usually ready to harvest within approximately 8–14 days. Earlier harvests are possible at the cotyledon stage, while first-true-leaf crops take longer.
Do Kale Red Russian seeds need soaking?
No. Red Russian Kale microgreen seeds are small and generally do not require soaking before sowing.
How long is the blackout period for Kale Red Russian microgreens?
Approximately 2–3 days is a useful starting point. Remove the cover once most seeds have germinated and the seedlings are beginning to push upwards.
How long do Kale Red Russian seeds take to germinate?
Under suitable conditions, Red Russian Kale microgreen seeds commonly germinate in approximately 2–3 days.
How much Kale Red Russian seed should I use for a 10 x 20 tray?
Approximately 10 g per standard 10 x 20 inch microgreen tray is a useful starting point. Use around 5 g for a 10 x 10 inch tray and adjust according to your particular growing setup.
What is the best temperature for Kale Red Russian microgreens?
Mild indoor temperatures around 18–24°C work well. Avoid unnecessarily hot, humid and poorly ventilated conditions.
Can Kale Red Russian microgreens be grown indoors?
Yes. They are well suited to indoor growing on a bright windowsill or under grow lights.
Can you grow Kale Red Russian microgreens without soil?
Yes. Red Russian Kale can be grown on hemp mats and other suitable hydroponic microgreen media.
How often should I water Kale Red Russian microgreens?
Check the crop daily. Most trays require watering once or twice each day, but the actual frequency depends on temperature, humidity, airflow and growing medium.
Keep the root zone moist without waterlogging it.
Should Kale Red Russian microgreens be bottom watered?
Bottom watering is a good method once the seedlings have established roots. It supplies water directly to the growing medium while reducing unnecessary moisture on the leaves and stems.
When should I harvest Kale Red Russian microgreens?
Harvest when the cotyledons are fully open, the stems are approximately 5–8 cm tall and the crop has developed good colour.
You can harvest before the true leaves appear or wait until the first true leaves begin to develop.
Do Kale Red Russian microgreens regrow after cutting?
They are normally treated as a single-cut crop. For a continuous supply, start another tray rather than relying on regrowth.
Are Kale Red Russian microgreens easy to grow?
Yes. They are a good choice for beginners because they germinate quickly, do not require pre-soaking and can be grown with a basic tray setup.
Can I grow Kale Red Russian microgreens all year round?
Yes. Indoor growing allows Red Russian Kale microgreens to be produced throughout the year, provided light, moisture, temperature and airflow are adequately managed.
Where can I buy Kale Red Russian microgreen seeds in Australia?
Seedmart supplies Kale Red Russian Microgreen Seeds in packet and bulk quantities for home and commercial microgreen growers throughout Australia.
You can also browse our full range of microgreen seeds for other varieties to grow individually or combine into mixed trays.
Learning how to grow Kale Red Russian microgreens is straightforward. Sow the dry seeds evenly onto moist growing medium, keep them covered for the first few days, move the seedlings into bright light after germination and maintain consistent moisture as they grow.
In approximately 8–14 days, you can harvest fresh Red Russian Kale microgreens with tender green leaves and attractive reddish-purple stems.
Once you have established the seed density, watering routine and lighting that work best in your growing conditions, Red Russian Kale is an easy variety to include in a regular indoor microgreen growing cycle.