Views: 1601, Replies: 12 » Jump to the end
Hydrogen Peroxide for Seed Starting

By RickCorey
May 7, 2012

When soaking seeds prior to germination, or when watering seedlings, use 0.1% Hydrogen Peroxide. This cleans the seed surface and discourages mold, fungus, and damping off. Drug stores sell 3% Hydrogen Peroxide, so dilute that 32:1. It is also great for plants already in the ground or in containers.

[View the item] Give a thumbs up

Name: Pippi21
Silver Spring, Maryland 20906 (Zone 7a)
Pippi21
May 6, 2012 6:10 PM CST
Rick, love your quick tip about soaking seed in Hydrogen peroxide but you failed to give measurements or did I miss reading that part?
Name: Ann ~Heat zn 9, Sunset
North Fl. (Zone 8b)
Garden Sages Native Plants and Wildflowers Xeriscape Organic Gardener I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level
Butterflies Charter ATP Member Plant Identifier Region: Florida Dog Lover Birds
Image
flaflwrgrl
May 6, 2012 7:32 PM CST
I never knew this & it's an excellent tip. I will give it a go. Thanks Rick! Thumbs up
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others.
~~ Sharon Brown ~~



Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Image
RickCorey
May 6, 2012 9:50 PM CST
Thank you! The first time I tried it, on old Salvia seeds, I got better germination rates.

Here are measurements for making different size batches.

The second number is the peroxide (just a little is needed).
Some people use it 2-3X stronger for brief soaks, like just washing the seed.

water - - - - - - - - peroxide

1 ounce - - 1 milliliter
1 cup - 1 and 1/2 teaspoons (7.5 ml)
1 pint - - 1 tablespoon
1 quart - - 2 tablespoons (1/32) = 1 OZ peroxide
1 gallon - - - 1/2 cup peroxide


I got this and several good ideas about peroxide from here:
http://www.using-hydrogen-peroxide.com/gardening-with-hydrog...
[Last edited by RickCorey - Jun 1, 2012 3:43 PM (+)]
Give a thumbs up | Quote | Post #253899 (3)
Name: Pippi21
Silver Spring, Maryland 20906 (Zone 7a)
Pippi21
May 7, 2012 12:30 AM CST
Do you use this on wintersown plants that are grown in milk jugs or liter bottles? Or is just for "Growing plants under lights?"
Name: Joanne
Calgary, AB Canada (Zone 3a)
I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Region: Canadian Charter ATP Member Seed Starter Roses
Plant Lover: Loves 'em all! Annuals Container Gardener Vegetable Grower Winter Sowing Enjoys or suffers cold winters
Image
Joannabanana
May 7, 2012 6:14 AM CST
I soak seed that have hard seed coats like moonflower or morning glories in hydrogen peroxide over night. They germinated within a few days. Easier than nicking the seed coat.
[Last edited by Joannabanana - Dec 22, 2014 7:25 PM (+)]
Give a thumbs up | Quote | Post #253996 (5)
Name: Mary
The dry side of Oregon
Be yourself, you can be no one else
Charter ATP Member Region: Oregon Farmer Enjoys or suffers cold winters
Image
MaryE
May 7, 2012 7:15 AM CST
Thanks for the tip! And also the measurements. I had visions of measuring by teaspoons, endlessly!
Of all the things I've lost, I miss my mind the most.
More ramblings at http://thegatheringplacehome.myfastforum.org/forum54.php
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Image
RickCorey
May 7, 2012 4:38 PM CST
I have heard of many different people watering seedlings with dilute H2O2 becuase it does carry some oxygen down to the root hairs.

Me, I would rather use a very open, coarse, soiless mix that let's beaucoup AIR get to the root hairs.

But peroxide might discourage damping off, at least a little.

I like the theory that H2O2 disourages mold and bacteria while soaking seeds overnight. And MAYBE in some cases it helps break dormancy by oxidizing some germination inhibitor, or helping to strip something off the seed coat.

Several people said they saw older seeds germinating faster or with a higher % germination.
Name: Joanne
Calgary, AB Canada (Zone 3a)
I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Region: Canadian Charter ATP Member Seed Starter Roses
Plant Lover: Loves 'em all! Annuals Container Gardener Vegetable Grower Winter Sowing Enjoys or suffers cold winters
Image
Joannabanana
May 7, 2012 7:07 PM CST
LOL I should have said nicking not kicking
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Image
RickCorey
May 7, 2012 7:34 PM CST
>> Easier than Kicking the seed coat.

That might be one way to wake them up from dormancy!
Name: Ann ~Heat zn 9, Sunset
North Fl. (Zone 8b)
Garden Sages Native Plants and Wildflowers Xeriscape Organic Gardener I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level
Butterflies Charter ATP Member Plant Identifier Region: Florida Dog Lover Birds
Image
flaflwrgrl
May 7, 2012 7:54 PM CST
Rolling on the floor laughing Rolling on the floor laughing Rolling on the floor laughing
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others.
~~ Sharon Brown ~~



Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Image
RickCorey
Dec 23, 2014 1:12 PM CST
Thanks for the thumbs, everyone!

I do want to mention again that many people use stronger concentrations of hydrogen peroxide for treating sick or fungusy-plants, or for soaking seeds for an hour or two.
Name: Jeanie
Minnesota (Zone 4a)
Replace your lawn with a garden!
Enjoys or suffers cold winters Plant Lover: Loves 'em all! Garden Procrastinator Daylilies Bee Lover Sedums
Hostas Dog Lover Xeriscape Region: Minnesota Heucheras Butterflies
Image
foraygardengirl
Dec 24, 2014 8:26 AM CST
Rick, great tip. I'm going to give it a try. And happy holidays to all!
:+:+:+:+:+:+:+:+:
Old gardeners never die. They are just pruned and repotted.
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Image
RickCorey
Dec 24, 2014 11:28 AM CST
I hope it helps. Maybe not much, with fresh seeds that are vigorous and already easy to start.

But older seeds and slow-to-germinate seeds do seem to benefit from it. And several people have said they use it to start seeds with thick coats.

« Garden.org Homepage
« Back to the top
« Forums List
« Hydrogen Peroxide for Seed Starting
You must first create a username and login before you can reply to this thread.

Today's site banner is by dirtdorphins and is called "Dianthus 'Nyewood Cream'"