Microgreens on paper towels do work for small, quick harvests. Line a shallow container with 2–4 layers of damp paper towel, scatter seeds evenly, cover them until they sprout, then move them to a bright window or grow light and keep the towels moist but not soggy. University of California Cooperative Extension and the University of Saskatchewan both describe this method. It suits fast crops like radish, broccoli, cress and mustard. For bigger yields, stronger roots and less mold, a hemp mat or coir works better.
Key takeaway: Paper towels are a cheap way to try microgreens, but they dry out and grow mold faster than real growing media. Mist often, drain extra water, and harvest early.
| Factor | Paper towels | Hemp mat or coir |
|---|---|---|
| Cost | Very low | Low to moderate |
| Water holding | Low; dries fast | Higher; more forgiving |
| Root support | Weak; plants may tip over | Good |
| Mold risk | Higher if kept soggy | Lower with good drainage |
| Best crops | Radish, broccoli, cress, mustard, chia | All microgreens, including pea and sunflower |
| Typical harvest | Small, early cut | Full tray |
How to Grow Microgreens on Paper Towels
- Choose a container. A clean takeout container, baking dish or seed tray 2 inches (5 cm) deep works. Drainage holes help but aren’t required if you avoid standing water.
- Add the paper towels. UC Cooperative Extension suggests lining a plastic container with 4 thicknesses of paper towel; the University of Saskatchewan uses 2–3 layers of damp towel.
- Wet the towels. Soak them, then tip out any extra water so the towels are damp, not swimming.
- Sow the seed. Scatter seeds evenly so they almost touch. Soak large seeds first.
- Cover. Keep the container covered or in a dark place until the seeds sprout. Saskatchewan suggests a plastic lid or another damp paper towel on top.
- Move to light. Uncover when green leaves appear and place the container in a bright window or under a grow light.
- Mist daily. UC recommends a spray bottle a couple of times a day; roots are shallow and dry quickly.
- Harvest. Cut at about 1–3 inches (2.5–7.5 cm) tall.
Best Seeds for Microgreens on Paper Towels
Fast, small to medium seeds that root quickly do best. UC Cooperative Extension lists radish, kale, broccoli, lettuce, mustard, cabbage, watercress, arugula, beets, peas and spinach as good microgreen choices. On towels, start with radish, broccoli, cress and mustard. Chia is also easy, since its gel-coated seeds stick to the damp towel. Large seeds like pea and sunflower can be grown on damp towels too; Saskatchewan notes that grains and sunflowers are often grown in trays with no soil, but their heavy shoots tend to tip over without media to anchor them.
Watering: The Key to Success
UC warns that microgreens don’t have many roots, so paper towels or other media must be watered often but not kept soggy, and that you shouldn’t use any greens that show mold or decay. Use these habits:
- Mist the surface until it glistens, then stop.
- Tip out any water collecting in the bottom of the container.
- Lift a corner of the towel; it should feel like a wrung-out sponge.
- Remove the lid as soon as seedlings emerge to let air move.
Do Microgreens on Paper Towels Need Fertilizer?
Usually not. Penn State Extension says little or no fertilizer is needed because microgreens aren’t grown for long, and the seed supplies most of what the seedling needs. It also reports that microgreens grown with clear water sometimes showed iron deficiency symptoms. If yours turn pale before harvest, mist with a very dilute hydroponic nutrient solution, about 50–100 ppm nitrogen, the range Penn State gives. See hydroponic nutrients for seedlings.
What Kind of Paper Towel to Use
Use plain, unscented, unprinted paper towels. Avoid towels with lotions, fragrance or printed designs. Thicker towels hold water longer, so you may need fewer layers. Use clean hands and a clean container; you’re growing a raw food in warm, damp conditions.
Common Problems With Microgreens on Paper Towels
| Problem | Likely cause | Fix |
|---|---|---|
| Fuzzy white growth on towel | Mold, or harmless root hairs | Root hairs vanish when misted; mold stays. Toss moldy trays. |
| Seedlings falling over | No anchoring media | Harvest earlier or switch to a mat |
| Dry, shriveled roots | Towel dried out | Mist more often; add a loose lid at night |
| Long, pale stems | Too little light | Move to brighter light sooner |
| Sour smell | Standing water | Drain and improve airflow |
See microgreens mold vs root hairs and microgreens light requirements.
Microgreens on Paper Towels vs Sprouting in a Jar
A paper towel tray isn’t the same as sprouting. Sprouts are rinsed in a jar and eaten whole, roots included. Microgreens on paper towels get light, turn green and are cut above the towel. Saskatchewan’s guide says the same: unlike sprouts, microgreens need sunlight to grow. See microgreens vs sprouts.
Food Safety Tips
- Buy seed sold for sprouting or microgreens, not treated garden seed. Penn State advises untreated seed.
- Use clean water and a clean container for each round.
- Wash the harvested greens before eating.
- Throw out any tray with mold, slime or a sour smell, as UC advises.
When to Upgrade From Paper Towels
Paper towels are great for a first experiment or a classroom project. If you want to grow every week, switch to a hemp or jute mat, coco coir, or a soilless mix. These hold more water, anchor roots, and give a taller, heavier harvest. Microgreens on paper towels will teach you seed spacing, blackout timing and harvest timing that carry straight over to a full tray. See microgreen grow mats and microgreen seed density.
A Kitchen or Classroom Project
Because the method needs only a container, a towel and a spray bottle, it’s a popular project with kids. The University of Saskatchewan suggests letting children choose their seeds and decorate their containers. Have each child sow a different seed, such as radish, broccoli or cress, and compare how many days each takes to sprout and green up. Older students can measure height each day and record when roots, cotyledons and true leaves appear. It’s a simple way to show that seeds carry stored food for early growth, and that light turns pale shoots green. Finish by tasting the harvest together.
FAQs
Can you grow microgreens on paper towels?
Yes, for small, fast crops like radish, broccoli, cress and mustard.
How many layers of paper towel should I use?
About 2–4 layers, kept damp but not soggy.
Do microgreens on paper towels need light?
Yes, once they sprout; keep them dark only until germination.
How often should I mist them?
About twice a day, or whenever the towel feels dry.
Can I reuse the paper towel?
No; compost it and start fresh.
Why is my paper towel moldy?
It’s likely too wet or lacks airflow; toss it and start again.
Sources
- University of California Cooperative Extension, Alameda County — Microgreens Fact Sheet
- University of Saskatchewan Gardening — Grow With USask: Microgreens
- Penn State Extension — Growing Microgreens
- Mississippi State University Extension — Growing Microgreens for the Mississippi Gardener
- Photo credits (Wikimedia Commons, edited with titles): Close-up of garden cress (Lepidium Sativum), 2025-01-19 by Nylki (CC0); Alligator Chia Pet by Jeremy Noble (CC BY 2.0); 11 microgreens by Stacy Spensley (CC BY 2.0); Fleece lined greenhouse potting tray and seed pots – Flickr – peganum by peganum from Small Dole, England (CC BY-SA 2.0); Mikrolistki – brokuł i rzodkiewka na tacach plastikowych by Teogenesis (CC BY-SA 4.0)