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Microgreen Seeds FAQ

Learn the essentials of growing microgreens, from choosing your first seeds to harvesting a fresh tray at home.

What is the difference between sprouts and microgreens?

Sprouts are harvested soon after germination and commonly eaten with the seed and root. Microgreens grow longer in a tray and are cut above the growing medium. Their harvest consists of young stems and leaves.

Which microgreens are easiest for beginners?

Broccoli and Daikon radish are good first crops. Both can be sown without pre-soaking and have relatively short growing cycles. Broccoli is mild, while radish has a stronger peppery flavour. See our beginner microgreen guide.

Can I use ordinary vegetable seeds for microgreens?

Choose seed sold as suitable for edible microgreen production. Check the species, intended use and treatment information; not every vegetable seedling is edible. Our Microgreen Seeds collection is the starting point for this growing method.

Do microgreens need soil?

No. Suitable options include coco coir, seed-raising mix, microgreen mixes and growing mats designed for the crop. Choose a clean medium that supports roots, holds moisture and drains well. See our microgreen growing guide.

Do I need to soak microgreen seeds?

It depends on the crop. Broccoli and radish are generally sown dry. Peas and sunflower usually need pre-soaking. Follow the individual product instructions rather than applying one soaking time to every variety.

How much seed should I use per tray?

Use the crop’s recommended seed weight and tray size. Our broccoli guide uses about 28g for a 25 × 50cm tray; a smaller tray needs less. Spread seeds evenly and avoid thick overlapping layers. Read the broccoli growing guide.

What is blackout, and do all microgreens need it?

Blackout is a covered stage used for some crops during establishment. The duration and any added weight depend on the variety. Some fine-seeded herbs need light during germination, so check the product guidance before covering them.

Can I grow microgreens indoors without a grow light?

Yes, if there is enough suitable natural light. Avoid positions that overheat in direct sun. A grow light can help where seedlings stretch towards a window or grow weak and pale. Indoor temperature and airflow also affect results.

How often should I water microgreens?

Check the growing medium daily and water when needed; there is no single schedule for every tray. Gentle surface watering helps during germination. Once roots establish, bottom watering can reduce wet foliage. Let excess water drain. See our watering guide.

Why are my microgreens yellow, leggy or falling over?

Newly uncovered seedlings may initially be pale. Persistent stretching can indicate insufficient light, while collapse can result from drying, overwatering or disease. Check the roots, moisture and airflow. Discard crops showing decay. Use our microgreen troubleshooting guide.

How do I tell mould from root hairs?

Root hairs grow from individual roots. Mould may form irregular patches or webs across seeds and growing medium. Rinsing away fuzz does not establish safety. If you are unsure or see spoilage, discard the tray. Our mould and root hairs guide explains the differences.

How long do microgreens take to grow?

Fast crops often take around one to two weeks. Our beginner guide lists roughly seven to ten days for Daikon radish and eight to twelve days for broccoli. Slower herbs can take several weeks. Check the crop’s current product guidance.

How do I harvest microgreens?

Use clean scissors to cut stems above the growing medium, keeping roots and growing mix out of your harvest. Handle with clean hands and refrigerate harvested greens promptly. Follow the variety’s washing and storage instructions.

Will microgreens regrow after cutting?

Treat most microgreens as a single-harvest crop. Pea shoots may produce some regrowth, but later growth can be less even. Starting a fresh tray generally gives a more predictable crop.

Can I reuse the trays and growing medium?

Reusable trays can be cleaned between crops. Remove old roots and growing medium, wash thoroughly and follow the equipment’s sanitising instructions. Start the next crop with fresh suitable medium rather than sowing into the old root mat.

Can I grow several varieties in one tray?

Start with separate trays or clearly separated crops. Varieties can differ in seed density, soaking, light requirements and harvest time. Once you understand their growing habits, you can experiment with compatible combinations.

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Still need help? Contact OzSprout.