Garden of Eatin' / How-To / Seeds & Seedlings

Germinate Seeds Quickly With Coffee Filters or Paper Towels

Germinate seeds quickly with coffee filters or paper towels

What if I told you there was a faster way to germinate all your seeds, without the need for seed starting mix, perlite, or vermiculite; without wrangling a bunch of seed starting trays, flats, and domes; and without any special equipment like heating mats, temperature sensors, and indoor seed starting systems?

The secret is as low-tech as you can get, and relies on only two things you likely already have in your kitchen: paper coffee filters and Ziploc bags.

This seed starting trick is sometimes known as the baggie method, and it works with coffee filters, paper towels, or even just newsprint.

It works like this: Place a few seeds between layers of wet coffee filters (or paper towels) and wait for them to germinate. Simple as that!

Germinating tomato seeds in a coffee filter

3 reasons you should use a paper towel or coffee filter for seed germination

Now why would you want to germinate seeds in a paper towel or coffee filter first, rather than germinating seeds indoors in seed starting mix?

1. It’s a good way to gauge if your seeds are viable to begin with, before you put them in pots.

Maybe you aren’t sure how old your seeds are (especially if the seeds were saved from your own plants).

Or, maybe you bought your seeds from a new supplier and want to check how healthy or accurate their germination rates are. (See the next section below on how to do a quick and simple germination test.)

Seed germination with a paper towel

2. You can start a lot more seeds this way, and use only a minimum of space while they get going.

It helps you pick out the fastest and most vigorous seeds to plant because you can actually see them germinate (a process that’s pretty mysterious to most of us since it happens underground).

3. Many seeds germinate much quicker in paper towels or coffee filters (versus seeds that are started in soil).

The heat, moisture, and controlled conditions inside a plastic baggie help them germinate in only a few days (or less, depending on the seed).

The baggie method for testing seed germination

How to test germination with the baggie method

Every once in a while, especially if your seeds are about to reach their expiry date, it’s a good idea to do a germination test and find out if the seeds are still worth planting.

Try this quick germination test when you’re unsure about your seeds

  • Count out 10 random seeds from the packet you want to test.
  • Follow the instructions below to germinate the seeds in a coffee filter or paper towel, and label the baggie with the date you started them.
  • Look on the seed packet or in any seed catalog for the expected number of days to germination for the seeds you’re testing. Wait that number of days, then count how many seeds have sprouted in that time.

If 8 out of 10 seeds germinated, that gives an 80 percent germination rate, which is pretty good for most vegetables. If only 4 out of 10 seeds germinated, then you have a 40 percent germination rate and the seed is, for all intents and purposes, useless.

A sprouted seed using the baggie method

When I find old seeds like this, I’ll throw them in the compost pile or feed them to my chickens. I might play around and put them in a random “salad blend” to sprout on my kitchen table, but I won’t bother planting them in the garden.

It is not wise to sow the seeds more thickly to make up for low germination. Weak seeds that struggle to even sprout will just result in weak plants that are likely to suffer from aphid infestations, fungal diseases, or other problems anyway.

You can germinate squash seeds in a paper towel or coffee filter

What types of seeds can be germinated with a paper towel or coffee filter?

All vegetable, herb, and flower seeds can be germinated in a paper towel or coffee filter, but personally, I find the baggie method to be most effective for seeds that take a long time to germinate.

Certain seeds that need a warm start (like chile peppers) are stubborn, taking up to three weeks to germinate. They need juuust the right conditions present before they sprout: the perfect balance of heat, moisture, and time.

In most seed starting scenarios, one or two of these requirements are usually lacking, which delays germination.

The baggie method speeds up the process by providing these conditions consistently with minimal effort on your part.

You can also germinate tomato seeds in a paper towel or coffee filter, as well as cucumber, squash, muskmelon, and watermelon seeds.

You can germinate cucumber seeds in a coffee filter or paper towel

Can you germinate kale, cabbage, broccoli, onion, or turnip seeds with the baggie method? Sure you can.

But cool-season seeds like these aren’t as finicky about heat, and seeds from the brassica family germinate quickly on their own anyway (usually within a couple days).

The baggie method isn’t necessary unless you want to test their germination rates; you can start them more easily just by sowing the seeds directly in the ground.

The same can be said for flower seeds. While you can sprout them in paper towels or coffee filters first, germination speed isn’t that important for flowers the way it is for vegetable seeds.

Germinating seeds in a coffee filter (works with a paper towel too)

How to germinate seeds in coffee filters (or paper towels)

Step 1: Gather your supplies.

  • Coffee filters (or paper towels or newsprint)
  • Plastic Ziploc (zip-top) bags
  • Seeds

I like to use coffee filters because the paper has a denser weave, which keeps the roots from growing into the fibers and making them difficult to separate when you’re ready to plant.

Depending on how many seeds you want to germinate at a time, cut the coffee filters as needed. (I cut mine in half to fit inside standard sandwich baggies.)

Gather your supplies for starting seeds in coffee filters

Step 2: Moisten the coffee filters.

Wet the coffee filters and wring them out, so the paper is damp but not drowning in water.

Wet the coffee filter and place the seeds 1 inch apart on the filter

Step 3: Place your seeds on the coffee filter.

Place your seeds on the bottom half of the paper, leaving an inch between seeds to give their roots room to grow. Fold the top half over the seeds to sandwich them.

Sandwich the seeds between two layers of damp coffee filters

Step 4: Place a coffee filter inside each baggie.

Slide the coffee filters (with seeds) inside the baggies.

I like to blow air into the bags using a straw and then seal them tight to speed up germination. You can also leave your bags flat, but keep them unsealed to provide air flow.

Place the coffee filters (with seeds) inside a plastic Ziploc baggie to add warmth and humidity

Step 5: Wait for the magic of germination to happen.

Place your baggies in a warm area of the house. For me, that’s a south-facing window, but you can leave them anywhere with a decent amount of heat and humidity, such as a bathroom or laundry room.

Just don’t keep them too hot (like on top of a heating pad), as you risk cooking the seeds before they ever sprout.

Place the baggies in a warm room and wait for the seeds to germinate

You can see the greenhouse effect created by the baggies here, which aids in germination. Because of this, you shouldn’t have to re-moisten the coffee filters while waiting for the seeds to germinate.

The plastic Ziploc baggies create a mini greenhouse effect for fast seed germination

Within a few short days, you should see your first sign of life โ€” a radicle emerging from the seed coat. This is the primary root and develops from the embryo of the plant.

Seeds germinated in a coffee filter

Step 6: Transplant the germinated seed.

Once the radicle reaches an inch or two in length, carefully transplant the germinated seed in potting mix, burying only the radicle (the white part) and keeping the stem and seed coat above the soil line.

Transplant the germinated seed in potting soil

Handle the seed by its seed coat, as the radicle is very delicate (as well as the life line of your soon-to-be seedling).

Don’t try to remove the seed coat before transplanting; it’ll fall off on its own when the first leaves (cotyledons) start to unfurl.

The seed coat will fall off on its own as the cotyledons energe

If any part of it is enmeshed in the paper, cut around the root and plant the whole thing in a pot, paper and all. The roots will grow around the paper and the paper will eventually disintegrate.

I try to transplant the seed as soon as it’s germinated so it doesn’t rot inside the baggie.

Sometimes you can wait until the first leaves appear if you need a guide as to how deep to bury the stem, but definitely keep an eye on the moisture level inside the baggie and provide plenty of ventilation at this stage.

After you’ve transplanted all your seedlings in small pots, keep the potting mix evenly moist with good airflow around the plants to prevent damping off disease.

You’ll need to harden them off for a few weeks before moving them outside, but once the seedlings develop their second set of leaves (the true leaves), they’re ready for their final place in the garden.

This post updated from an article that originally appeared on February 1, 2013.

About Author

I'm a plant lover, passionate road-tripper, and cookbook author whose expert advice and bestselling books have been featured in TIME, Outside, HGTV, and Food & Wine. The No-Waste Vegetable Cookbook is my latest book. Garden Betty is where I write about modern homesteading, farm-to-table cooking, and outdoor adventuring โ€” all that encompass a life well-lived outdoors. After all, the secret to a good life is... Read more ยป

52 Comments

  • Bren
    September 17, 2021 at 12:06 pm

    Wow, so much great info on this site. I have sprouting seeds that are a few years old and this is perfect for determining whether or not I should try sprouting. Thanks!

    Reply
  • Angela Vella
    January 14, 2021 at 1:47 am

    Does this work well for spinach seeds? I have had trouble getting them to germinate in soil.

    Reply
    • Linda Ly
      January 18, 2021 at 1:33 am

      Yes, this trick works for all seeds!

      Reply
  • Alithea
    April 20, 2017 at 10:43 am

    My kalamansi seeds had molds on them by the second day. My mom told me I should have dried them out first before trying this method. Is this true? Btw,I used recycled take out containers.

    Reply
    • Alithea
      April 20, 2017 at 10:44 am

      It worked on one of the 16 Four o’clock seeds that I bought from the supermarket.

      Reply
    • Linda from Garden Betty
      May 18, 2017 at 8:25 am

      It’s possible your kalamansi seeds weren’t fully mature yet, or there were existing fungi on the seeds that grew under very moist and humid conditions. If you tried to start your seeds in soil, here’s a post I wrote about damping off: http://www.gardenbetty.com/2015/03/what-is-damping-off-disease/

      Reply
  • BaconSocks
    January 24, 2017 at 2:17 pm

    i put mine in a shallow tupperware with a red lid and left it in the laundry room, but left a gap for just a little bit of air. There’s no light there either as its in a dark corner but very warm, tropical-like. it’s been there for a few days but nothing growing. i have to moisten the coffee filter every day. should i just seal it?

    Reply
    • Linda from Garden Betty
      January 29, 2017 at 8:58 am

      It depends on the seed varieties. Some can take up to 3 weeks to sprout.

      Reply
  • Peter8Piper
    April 19, 2016 at 4:19 pm

    Can I use this method on seeds that I want to eat as sprouts? Seems a lot easier than the jar method where I have to wash them off every day. ???

    Reply
    • Linda Ly of Garden Betty
      April 26, 2016 at 10:32 pm

      I don’t recommend it, as the warm and humid conditions needed for the seeds to germinate using this baggie method can also breed bad bacteria.

      Reply
  • Peter8Piper
    April 19, 2016 at 4:16 pm

    Can I use this method on seeds that I want to eat as sprouts? Seems a lot easier than the jar method where I have to wash them off every day. ???????????

    Reply
  • Lynda Holliday
    April 15, 2016 at 7:14 am

    I see you use Baker Creek seed. Have you ever gone to one of their festivals?

    Reply
    • Linda Ly of Garden Betty
      April 26, 2016 at 10:15 pm

      Yes, I’ve been a presenter at both their Missouri and California festivals! (And will hopefully speak again in Santa Rosa this year, if my schedule allows.)

      Reply
  • vinienco
    January 2, 2016 at 12:18 pm

    sprouts provide better nutrition , if being grown in the dark, are healthier and cleaner with sterilized paper or sprout material. sprouts need clean water twice daily. fail, lazy article.

    Reply
    • Linda Ly of Garden Betty
      January 2, 2016 at 8:43 pm

      Fail, lazy reader. This article is about germinating seeds for gardening, not sprouting microgreens for food.

      Reply
      • vinienco
        January 5, 2016 at 3:47 am

        fu ho

        Reply
      • SmallAxe
        April 3, 2016 at 1:58 pm

        Couldn’t have said it any better myself. Great article and thank you!!

        Reply
    • Quintin
      May 1, 2016 at 8:50 pm

      Go away lazy reader…no one likes you here, LOL…just kidding….write whatever makes you happy lazy reader loser. ๐Ÿ™‚

      Reply
  • mohan
    April 14, 2015 at 3:30 am

    does this work for flower seeds as well??

    Reply
    • Linda Ly
      April 17, 2015 at 4:32 am

      Yep!

      Reply
  • penis pump
    March 5, 2015 at 2:44 pm

    brilliant!

    Reply
  • PIET
    October 24, 2014 at 9:34 am

    DOES THIS WORK ON ALL SEEDS?

    Reply
    • Linda Ly
      October 24, 2014 at 7:02 pm

      Yes, but it works best on seeds that are slow to germinate, slow to grow in the seedling stage, or need to be kept moist at all times.

      Reply
  • TomyJ
    July 21, 2014 at 11:39 am

    Can I take the seeds from a Jalapeno right into the paper towel? or do I need to dry the seeds for days?

    Reply
    • Linda Ly
      July 21, 2014 at 4:27 pm

      Assuming you picked a jalapeno pepper while it was ripe and has mature seeds, yes you can plant them right away. The only reason seeds need to be dried is to prepare them for storage (to prevent rotting).

      Reply
  • Jim
    February 8, 2014 at 8:09 pm

    Thanks! Really most useful site on this method of starting seeds!

    Reply
    • Sioned Gwilym
      May 4, 2021 at 5:03 am

      Fabulous tips. Thank you.

      Reply
  • Xochi Navarro
    January 10, 2014 at 10:06 am

    Saw this video on Mother Earth News and immediately thought of your post. http://www.motherearthnews.com/organic-gardening/seed-viability-zv0z1306zrob.aspx

    Reply
  • The Blessed Seed
    July 31, 2013 at 3:34 am

    Very nice idea.

    Reply
  • Annywithawhy.yt
    February 24, 2013 at 1:28 am

    Oh, this is great! Definitely going to do this, thank you for the idea!

    Reply
  • Janet
    February 21, 2013 at 7:20 pm

    I love my pet TickleMe Plant

    Reply
  • julie
    February 10, 2013 at 6:23 am

    Do you use lights/grow lights at all when starting indoors?? I have had no luck starting seeds in windows – so am thinking of trying lights for the first time but I am NERVOUS. ๐Ÿ™‚

    Reply
    • Linda Ly
      February 12, 2013 at 2:17 am

      I don’t, but I put all of my seed trays in front of a south-facing window so they get plenty of sun every day. If your seedlings are in a space with little to no sun, I do recommend grow lights to keep them from getting leggy.

      Reply
      • Jeremy Gardner
        December 7, 2014 at 4:03 pm

        My apartment has no south facing windows, or any that get much sun–so in my place specifically, grow lights are a must to get my mint seeds to germinate and keep my existing mint plants healthy. Loved the article!

        Reply
        • Linda Ly
          December 7, 2014 at 8:18 pm

          Thanks!

          Reply
  • Julie
    February 1, 2013 at 10:46 pm

    What is soilless mix? I start my seeds in starter soil.

    Reply
  • michelle
    February 1, 2013 at 7:24 pm

    I’m in Canada so this won’t be happening anytime soon but I’ll definitely be trying this in May. Love the tips.

    Reply
    • Linda Ly
      February 2, 2013 at 7:36 am

      In May?? That sounds… very cold up there. ๐Ÿ˜‰

      Reply
    • Karen Clarke
      March 13, 2021 at 9:27 pm

      You should start them now, in mid March. May is for transplanting outdoors. (I’m in Winnipeg)

      Reply
  • Xochi Navarro
    February 1, 2013 at 10:33 am

    This is fantastic. I will be using this technique this weekend to sprout my garden. I’m always leery of the little homegrown seeds I buy from farms because I feel like most of them never germinate. This is the perfect way to test their viability and be sure that my egg crate seedlings are all growing and no space is wasted. Thank you again! I live by your posts and tips now. ๐Ÿ™‚

    Reply

Leave a Reply to Linda Ly of Garden Betty Cancel Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.