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If you're buying seeds to grow microgreens you'll eat, there's one thing worth checking before anything else: has the seed been treated?

Quick answer

Untreated seeds have no chemical coating on them. Most seed sold for farming does — a fungicide or insecticide dressing that protects the seed in soil. That's fine for a crop you harvest months later, and not fine for a microgreen you cut in a week and eat raw. Non-GMO is a separate thing entirely: it describes whether the seed was genetically engineered, not whether anything was sprayed or coated on it. A seed can be Non-GMO and still be treated. Check both, and check the treatment status first.

What are untreated microgreen seeds?

Untreated seed is seed that hasn't had a chemical coating applied after harvest. Nothing more complicated than that.

Seed companies treat seed for a practical reason. A seed sitting in cold, wet soil for two weeks is vulnerable to fungal rot and soil insects, and a coating gets it past that window. For a farmer planting a field of mustard, treatment is sensible.

Microgreens work differently. The seed goes onto damp cocopeat indoors, germinates in two or three days, and you cut the seedling at six to twelve days and eat it raw. There's no long vulnerable window to protect against, and no time for anything on the seed to break down before it reaches your plate.

That's the whole argument. It isn't that treated seed is poison — it's that seed treatments were designed for a crop you don't eat within a week of sowing.

Why seed treatment matters for microgreens

Two reasons, and the second one gets missed.

The obvious one: you're eating the plant days after the seed was sown, and the seed coat is often still attached to the seedling when you cut it.

The less obvious one: microgreens are usually eaten raw. Cooking isn't there to reduce anything, and a quick rinse won't remove a coating that was formulated to stay on a seed in wet soil.

So the sensible approach is to buy seed meant for eating rather than seed meant for planting a field.

Treated vs untreated seeds

Treated seed is usually easy to spot, because the industry deliberately makes it obvious.

Treated seedUntreated seed
ColourOften dyed bright pink, red, blue or greenThe seed's natural colour
LabellingWarning text, sometimes a skull symbolSays untreated, or nothing at all
Sold forSowing in soilSowing, sprouting or eating
Dust in the packetSometimes coloured powderNone
Where you find itAgricultural and nursery suppliersMicrogreen and sprouting suppliers

The dye exists precisely so nobody mistakes treated seed for food. If a packet of seed is bright pink, that is the manufacturer telling you not to eat it.

Where it gets harder: not all treated seed is dyed. Some coatings are clear or nearly so. That's why the colour check alone isn't enough, and why asking the seller is worth doing.

What does Non-GMO mean?

Non-GMO means the seed wasn't produced using genetic engineering. That's it.

It says nothing about chemical treatment, nothing about how the crop was grown, and nothing about pesticide residue. These are genuinely separate questions and they get run together constantly.

Worth knowing for India specifically: no genetically modified vegetable seed is approved for commercial cultivation here. Bt cotton is the only GM crop cleared for commercial growing. So for the vegetable and herb varieties microgreens are grown from, GMO isn't really the live issue — treatment status is.

Gene editing is a separate category again, and its regulatory position differs from older genetic modification. If a supplier makes a specific claim about either, ask what they mean by it.

Untreated vs Non-GMO vs organic

This table is the thing most people actually need.

LabelWhat it meansWhat it does NOT automatically mean
UntreatedNo chemical coating applied to the seedNot necessarily organic, and says nothing about how the parent crop was grown
Non-GMONot produced by genetic engineeringNot necessarily untreated, organic, or pesticide-free
OrganicGrown to a specific organic standard, usually with certificationNot automatically untreated — some treatments are permitted under organic rules
Food-gradeSold and handled as food rather than as planting stockNot a guarantee of organic or Non-GMO status
HeirloomAn open-pollinated variety, saved and passed downNot necessarily untreated, organic or Non-GMO

Read that organic row twice. People assume organic means untreated, and it doesn't always — certain treatments are allowed under organic standards. If treatment status is what you care about, ask about treatment status.

How to identify untreated microgreen seeds

A few practical checks before you buy.

  • Look at the colour. Natural seed colour is a good sign; bright pink, blue or green is a clear warning.
  • Read the label. Treated seed normally carries a warning. Untreated seed often says so directly.
  • Check what it's sold for. Seed listed for sprouting or microgreens is far more likely to be untreated than seed listed for field sowing.
  • Look for a germination figure. Suppliers who test their seed usually publish the number. It's a sign someone is paying attention.
  • Check the pack size. Field seed comes in kilos. Microgreen seed sold in 20g to 100g packs is aimed at growers like you.
  • If you're buying from a nursery or agricultural shop rather than a microgreen supplier, be more careful. Field vegetable seed sits on those shelves, and it's often treated.

    Questions to ask a seed supplier

    Four questions, and any decent supplier will answer all four without hedging.

  • Is this seed treated in any way? A straight yes or no.
  • What's the tested germination rate for this variety? A real figure, not "high".
  • What pack sizes do you sell, and what's the price per pack?
  • Is this seed intended for eating, or for sowing in soil?
  • If the answers are vague, that's your answer.

    Best microgreen seeds for beginners

    If you're starting out, pick something fast and forgiving. Speed matters more than you'd think — a variety that's ready in a week gives you feedback before a problem can ruin the tray.

    VarietyTime to harvestFlavourGood first choice?
    Radish6 to 8 daysPeppery, sharpYes — the easiest we sell
    Mustard6 to 8 daysSharp, like raiYes
    Sunflower7 to 10 daysNutty, mildYes, and the biggest yield per tray
    Fenugreek (methi)8 to 12 daysFamiliar, slightly bitterYes, and the cheapest way in
    Broccoli8 to 12 daysMild, earthyYes, though slower

    Radish is where we'd point most first-time growers. It germinates fast, tolerates the watering mistakes everyone makes early on, and you'll know within a week whether you enjoy the process.

    Coriander is the one to avoid first. It's slow and germinates unevenly, which is discouraging when you're still learning. Our guide to beginner microgreen seeds goes into more detail.

    How to store microgreen seeds

    Seed lasts a long time if you keep it dry and cool, and not long at all if you don't.

    Keep it in an airtight container rather than the paper packet it arrived in. Paper breathes, which is exactly what you don't want during a humid Indian monsoon. Add a silica gel sachet if you have one — the ones that come in shoe boxes work.

    Store it somewhere cool and dark, away from the stove and away from a window. A kitchen cupboard on an interior wall is fine.

    Heat and moisture together are what kill germination. In a dry climate, seed in an airtight jar holds up for a couple of years. Along the coast, or through the monsoon anywhere, buy smaller quantities more often rather than a year's supply at once.

    Our seed storage guide covers this by region if you want the detail.

    Buying untreated microgreen seeds in India

    Worth checking before you pay:

  • Treatment status, stated plainly by the seller
  • A tested germination figure for that variety
  • Pack size and price, so you can work out cost per tray
  • What the seed is sold for — eating or field sowing
  • Packaging that's moisture-proof rather than a paper envelope
  • Whether the supplier answers questions clearly
  • On cost: a 100g pack covers roughly five to ten trays depending on variety and how densely you sow. That's usually a more useful number than the price on the packet.

    SAGreens seed is untreated and non-GMO, germination tested before packing, and sold in packs sized for microgreen growing rather than field planting. Current prices run from ₹50 for 100g of wheatgrass to ₹360 for 100g of kohlrabi, with most varieties between ₹69 and ₹200. Every variety shows its own tested germination figure on its product page — sunflower at 98%, broccoli at 96%, radish and mustard at 95%, down to 85% for the slower varieties like coriander and spinach.

    We ship across India from our farm in Keshav Nagar, Mundhwa, Pune. Delivery is charged by order weight and shown before you confirm.

    What if you've already sown treated seed?

    It happens, usually when someone grabs a packet from a nursery without checking.

    Don't eat that tray. There's no rinse or soak that reliably removes a coating designed to stay on a seed in wet soil, and you're eating the seedling within days of sowing. Compost it, wash the tray properly, and start again with seed sold for eating.

    If you're not sure whether the seed was treated — no dye, no warning text, bought loose — treat it as unknown rather than assuming it's fine. Seed for eating is cheap enough that the tray isn't worth the doubt.

    Growing from untreated seed in Indian conditions

    One thing people expect and shouldn't: that untreated seed will struggle without its chemical protection. It doesn't, because the thing treatment protects against isn't present in a microgreen tray. What does affect your tray is temperature and airflow, and those change a lot across the Indian year.

    Through the monsoon, humidity is the problem. Damp air plus still air over wet cocopeat is how mould starts, and people often blame the seed when the real cause is a crowded tray in a closed room. Sow thinner than usual, space trays further apart, and run a fan near the rack for an hour or two a day. Keep the seed itself airtight with a silica sachet.

    Through peak summer, above about 35°C, the medium dries between waterings and seedlings wilt before you notice. Move trays indoors and away from west-facing windows, bottom water twice a day, and stay with the fast varieties — radish and mustard are out of the tray in six to eight days, which is fewer days for heat to do damage.

    Through winter, in the north especially, growth simply slows. A tray that finishes in seven days in October can take ten or eleven in January. That's normal and not a seed problem. Judge a winter tray on day eight or nine rather than day six, and keep it off a cold windowsill overnight.

    Frequently asked questions

    Are Non-GMO seeds the same as untreated seeds?

    No. They describe different things. Non-GMO refers to whether the seed was produced using genetic engineering. Untreated refers to whether a chemical coating was applied to the seed after harvest. A seed can be Non-GMO and still be treated, which is why it's worth asking about both.

    Can I use normal vegetable seeds to grow microgreens?

    Usually not a good idea. Vegetable seed sold for sowing in soil is often treated with fungicide, and it's rarely sold with a germination figure. It also comes in pack sizes meant for a field rather than a tray. If you can confirm a particular seed is untreated and sold for food use, it will grow — but confirming that is the hard part.

    How do I know if a seed has been treated?

    Start with colour: treated seed is usually dyed bright pink, red, blue or green, specifically so it isn't mistaken for food. Then read the label, which normally carries a warning. Then check what the seed is sold for — sprouting and microgreen seed is far more likely to be untreated than field seed. Not every treatment is dyed, though, so the surest route is simply asking the supplier.

    Are organic seeds automatically untreated?

    Not always. Organic refers to the standard the crop was grown to, and some seed treatments are permitted under organic rules. If untreated is specifically what you need, ask about treatment rather than assuming organic covers it.

    Can I use grocery store methi or dhaniya seeds for microgreens?

    Sometimes they'll grow, but there are two problems. Spice seed isn't sold for germination, so there's no tested figure and some of it has been stored in ways that reduce viability. And it's usually not clear how it was handled before it reached the shop. Seed sold for microgreens is untreated and tested, which is what you're paying the difference for.

    Which microgreen seeds are easiest for beginners?

    Radish and mustard, both ready in six to eight days. They germinate quickly and forgive the watering mistakes most people make on a first tray. Sunflower is the next easiest and gives the most weight per tray. Leave coriander until later — it's slow and germinates unevenly, which is discouraging early on.

    How long can I store microgreen seeds?

    Kept airtight, cool and dark, most microgreen seed stays viable for a couple of years in a dry climate. Humidity is what shortens that. During monsoon, or anywhere coastal, buy smaller quantities more often and add a silica gel sachet to the container.

    How many trays will a 100g pack cover?

    Roughly five to ten, depending on the variety and how densely you sow. Larger seed like sunflower and pea shoot needs more per tray; small seed like mustard and radish goes further. Working out cost per tray is usually more useful than comparing pack prices.

    Where can I buy untreated microgreen seeds in India?

    From suppliers who sell seed specifically for microgreens and sprouting rather than for field sowing, and who will tell you the treatment status and germination rate when you ask. SAGreens ships across India from Pune; you can see the current range and prices on the seed catalogue.

    What should commercial growers check before buying?

    The same things, plus consistency between lots. If you're running trays weekly, a variable germination rate is more expensive than a slightly higher seed price, because it costs you tray space and predictability. Ask about pack sizes above 500g, and ask whether the germination figure is tested per batch. Our buying guide covers what to check in more detail.

    Do untreated seeds germinate worse than treated ones?

    Not in a microgreen tray. Seed treatment protects against soil-borne fungus and insects over the weeks a field crop needs to establish. On damp cocopeat indoors, germinating in two or three days, there's nothing for the treatment to protect against. Germination on a microgreen tray comes down to seed quality, temperature and watering.

    Buying microgreen seeds from SAGreens

    Looking for seed to start growing? You can browse the current range, pack sizes and prices on our microgreen seed catalogue, or read the microgreen seeds guide for sowing rates and variety notes.

    If you're not sure which variety suits what you want to grow, send us a message through our contact page and we'll point you at something sensible. We'd rather you bought one pack that works than five that sit in a cupboard.

    About the author. SAGreens is run by Ajay Toradmal in Keshav Nagar, Mundhwa, Pune, from a three-generation farming family. We grow microgreens on the farm and sell the same seed we use ourselves.

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