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Growing Microgreens Hydroponically

What Are Microgreens? How to Grow Them with Hemp Growing Mats

Microgreens are young edible plants harvested shortly after germination, once their first leaves have developed. They can be grown in soil or hydroponically on a growing medium such as hemp fibre matting. Hemp growing mats provide a clean, plant-based surface that holds moisture, supports root development and avoids the mess of loose soil.

Advance Landscape Systems supplies hemp growing media for home and commercial microgreen production, including pre-cut Terrafibre Hemp Grow Mats and FuturPonic™ Hemp Roll.

This guide explains what microgreens are, how they differ from sprouts, how hemp growing mats work, and what to consider when choosing a growing medium.

What are microgreens?

Microgreens are young edible seedlings grown from vegetable, herb and other edible plant seeds.

They are harvested after germination, once the shoots and first leaves have developed, but before the plant reaches maturity.

Common microgreen varieties include:

  • radish
  • broccoli
  • mustard
  • kale
  • sunflower
  • peas
  • rocket
  • basil
  • beetroot
  • coriander

Microgreens are commonly used in salads, sandwiches, garnishes and other fresh food applications because of their colour, flavour and texture.

Microgreens

What is the difference between microgreens and sprouts?

Microgreens and sprouts are not the same thing.

The main difference is how long they are grown and how they are harvested.

Sprouts are germinated seeds that are generally harvested very early and eaten whole, including the seed, shoot and root.

Microgreens are grown for longer, exposed to light, and harvested by cutting the stem above the growing medium.

Microgreens also require a surface in which their roots can establish. This may be soil, coco fibre or a hydroponic growing mat such as hemp.

Can you grow microgreens without soil?

Yes. Microgreens can be grown without soil using a hydroponic growing medium.

The growing medium supports the seed and developing root system while water is supplied directly to the crop.

Using a mat instead of loose soil can offer several practical advantages:

  • less loose material around the growing area
  • simple tray preparation
  • clean harvesting
  • consistent growing depth
  • easy handling between crop cycles
  • suitability for indoor and tray-based growing

Hemp fibre is one material that can be used for this purpose.

What is a hemp microgreen growing mat?

A hemp microgreen growing mat is a fibrous sheet made from hemp fibre that is placed inside a growing tray.

The mat acts as the physical growing medium for the microgreen crop.

Seeds are distributed across the surface, the mat is kept moist, and developing roots grow into the fibres.

The hemp growing mats currently supplied through Advance Microgreen are described as biodegradable and compostable. The range includes both pre-cut mat formats and roll material.

Why use hemp for growing microgreens?

Hemp is useful as a microgreen growing medium because its fibrous structure can support roots while holding moisture.

For growers, the main benefits are practical.

Hemp provides a stable rooting surface

As microgreen seeds germinate, their roots need a structure to grow into.

The interconnected fibres in a hemp mat give developing roots a surface to anchor into, helping support the crop as it establishes.

Hemp holds moisture

Seeds and young plants need consistent moisture during germination and early growth.

Hemp fibre can retain water within the mat, helping distribute moisture around the root zone.

As with any growing medium, watering still needs to be managed carefully. The mat should remain suitably moist without the tray becoming unnecessarily waterlogged.

Hemp avoids loose soil

One of the clearest benefits of hemp mats is convenience.

Growers do not need to fill trays with loose potting mix before each crop.

This can make setup and harvesting cleaner, particularly for:

  • indoor growers
  • home kitchens
  • cafés and restaurants
  • commercial tray-production systems

Hemp is plant based

Hemp is a natural fibre rather than a synthetic growing substrate.

The hemp mats sold through the Advance Microgreen range are marketed as biodegradable and compostable, making them a useful option for growers who prefer plant-based growing media.

Hemp mats provide consistency

Using pre-cut mats or roll material allows the grower to create a consistent growing surface from tray to tray.

That can make repeated production simpler than manually filling each tray with soil to a similar depth.

Microgreens Growing Kit

How do you grow microgreens on a hemp mat?

The exact process varies by seed type, but most hemp-mat microgreen systems follow the same basic steps.

1. Place the hemp mat in the tray

Use a pre-cut mat that fits the tray or cut hemp roll material to size.

Lay the mat flat so seeds have an even growing surface.

2. Moisten the mat

Wet the mat thoroughly before sowing.

The aim is to distribute moisture throughout the fibres without leaving excessive standing water in the tray.

3. Sow the seed evenly

Spread microgreen seed across the surface.

Seeding density varies by variety.

Smaller seeds such as broccoli and radish are handled differently from larger seeds such as peas and sunflower.

4. Allow the seeds to germinate

Many microgreen varieties are initially covered or kept in reduced light while they germinate.

Follow the germination method appropriate for the seed variety being grown.

5. Introduce light

Once germination is established, expose the crop to appropriate light so the young plants can develop.

6. Maintain moisture

Check the mat regularly as the crop grows.

Young plants can dry quickly, particularly in warm or well-lit growing environments.

7. Harvest above the mat

When the crop reaches the desired stage, cut the stems above the growing medium.

The roots remain within the hemp mat while the edible shoots are harvested.

Watch the video

What hemp microgreen products does Advance supply?

The existing Advance Microgreen range includes several hemp growing media formats.

Terrafibre Hemp Grow Mats

These are pre-cut hemp fibre mats designed for tray-based microgreen growing.

The existing range includes 25 cm x 51 cm mats supplied in pack quantities.

Pre-cut mats are useful for growers who want a simple, ready-to-use format with minimal preparation.

FuturPonic™ Hemp Roll

FuturPonic™ Hemp Roll is supplied as a 25 cm x 40 m roll.

A roll format allows growers to cut material to suit their production needs and can be practical for growers running multiple trays or repeated crop cycles.

Terrafibre Hemp Hydroponic Mat

Terrafibre Hemp Hydroponic Mat provides another hemp-based growing medium option for hydroponic applications.

Are hemp growing mats suitable for beginners?

Yes. Hemp growing mats can be a straightforward option for people growing microgreens for the first time.

They remove the need to measure and handle loose soil and create a defined growing surface inside the tray.

A basic microgreen setup generally requires:

  • suitable microgreen seed
  • a growing tray
  • hemp growing mat
  • water
  • suitable light
  • appropriate temperature and airflow

The exact growing conditions depend on the seed variety.

Microgreens Growing Kit

Are hemp mats suitable for commercial microgreen growers?

Yes. Hemp mats can also be used in repeated or higher-volume tray production.

Commercial growers may benefit from:

  • consistent tray setup
  • reduced handling of loose media
  • easy sizing through roll formats
  • cleaner harvesting
  • repeatable production processes

The most appropriate format will depend on tray dimensions, crop volume and production method.

Do microgreens grown on hemp mats need fertiliser?

There is no single answer for every crop.

Many microgreens are harvested relatively early, and seeds contain stored energy that supports the first stages of plant growth.

Requirements can vary according to:

  • seed variety
  • crop duration
  • water quality
  • growing system
  • production objectives

For new growers, it is useful to first focus on consistent moisture, light, temperature, airflow and hygiene before adding unnecessary complexity.

What is the best growing medium for microgreens?

There is no single best growing medium for every grower.

The right choice depends on how you grow, how often you grow and what you value most.

Soil may suit growers who:

  • already use conventional growing media
  • want a familiar gardening method
  • do not mind handling loose material

Hemp mats may suit growers who:

  • want a cleaner tray system
  • prefer plant-based growing media
  • want consistent media depth
  • are growing indoors
  • want easier tray setup
  • grow repeatedly and value convenience

For many hydroponic microgreen systems, hemp provides a practical balance between root support, moisture retention and ease of handling.

How long do microgreens take to grow?

Growth time varies by plant variety and growing conditions.

Some microgreens develop quickly, while larger-seeded crops or slower-growing herbs can take longer.

Factors that affect growth include:

  • seed variety
  • temperature
  • moisture
  • light
  • seeding density
  • airflow

Always follow growing guidance appropriate to the particular seed being used.

What are the most important things for successful microgreen growing?

Regardless of the growing medium, successful microgreen production depends on several basic factors.

Use suitable seed

Choose seed intended for edible growing and suited to microgreen production.

Maintain consistent moisture

Do not allow newly germinated seed to dry out, but avoid excessive saturation.

Provide sufficient light

After germination, microgreens need adequate light to develop healthy growth.

Maintain airflow

Good airflow helps create a healthier growing environment, particularly once seedlings become dense.

Keep trays clean

Microgreen systems are warm and moist, so good hygiene is important between crop cycles.

Adjust the method by variety

Different microgreens do not all behave the same way.

Peas, sunflower, radish and basil can differ considerably in seed size, germination behaviour and growth rate.

Mizuna microgreens

Microgreens FAQs

What are microgreens?

Microgreens are young edible seedlings harvested after germination and before the plant reaches maturity.

Are microgreens the same as sprouts?

No. Sprouts are generally harvested earlier and consumed with the seed and root. Microgreens are grown on a growing medium and harvested above the roots.

Can microgreens grow without soil?

Yes. Microgreens can be grown hydroponically using growing media such as hemp fibre mats.

What does a hemp growing mat do?

A hemp mat holds moisture and provides a fibrous surface for microgreen roots to establish.

Are hemp microgreen mats biodegradable?

The hemp mats currently sold through the Advance Microgreen range are described as biodegradable and compostable.

Are hemp mats reusable?

Hemp mats are generally used as the growing medium for an individual crop cycle rather than as a permanent reusable substrate.

Can you compost hemp microgreen mats?

The existing Advance Microgreen range describes its hemp mats as compostable. Growers should take into account any roots, seed residues or other materials present when deciding how to dispose of used growing media.

Do you need soil with a hemp grow mat?

No. The hemp mat itself acts as the growing medium in a hydroponic microgreen setup.

Can beginners use hemp microgreen mats?

Yes. Pre-cut mats can simplify tray setup by removing the need to measure and handle loose growing media.

What size hemp mat should I use?

Choose a mat that matches the dimensions of the tray. Pre-cut mats provide a ready-sized option, while hemp rolls allow growers to cut material to suit different tray sizes.

A cleaner way to grow microgreens

Microgreens can be grown in surprisingly little space, and they do not necessarily require soil.

For growers who prefer a clean, simple tray system, hemp fibre provides a plant-based growing medium that supports roots, retains moisture and is easy to handle.

Advance Landscape Systems has brought the specialist Advance Microgreens product range into the main Advance website, making it easier to access hemp growing media alongside our broader range of practical growing and landscape products.

 

Explore the Advance Microgreens range to find hemp grow mats and roll media for your growing setup.

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