Be Rid of Fungus Gnats: H2O2 will also help strengthen your seedlings against damping off...

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Be Rid of Fungus Gnats

By careyana
December 8, 2011

A few drops of hydrogen peroxide in your water will keep the fungus gnats away.

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Name: Linda
SE Houston, Tx. (Hobby) (Zone 9a)
"Godspeed, & Good Harvest!"
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Gymgirl
Dec 8, 2011 9:53 AM CST
I use H2O2 for the first few waterings of my newly sown seedlings.

After they pop, I add 1 tsp. to a gallon of water (always tepid), and gently top water with a turkey baster, applying the water around the base of the seedlings, so they are in contact with the H2O2. To date, I haven't lost a single seedling to damping off! After 1-3 top waterings like this, I begin bottom watering in the drip tray, and continue with the H2O2 for about the next two waterings. So, that makes a total of 5 applications of the H2O2. I also use the turkey baster to suck out the water from the drip tray after about 15-20 minutes, so the seedlings aren't constantly sitting in water. Too wet soil will definitely contribute to damping off!

Then, I move on to bottom watering with plan water, and, after potting up, when the seedlings are much further down the line, I begin adding a scant 1/2 tsp. of MG Water Soluble Plant fertilizer to the gallon of water.

I started 208 tomato seeds and 65 bell pepper seeds this past January, and didn't lose a single one to damping off.

Hugs!

Linda
Name: Julia
Washington State (Zone 7a)
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springcolor
Dec 8, 2011 10:51 AM CST
Good info! I will try on my cuttings.
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Name: Janet
Gilroy, CA
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imapigeon
Dec 8, 2011 12:14 PM CST
Gotta remember this one! Thanks for posting!
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Name: Linda
SE Houston, Tx. (Hobby) (Zone 9a)
"Godspeed, & Good Harvest!"
Region: Texas Vegetable Grower Seed Starter Garden Ideas: Master Level Canning and food preservation Gardens in Buckets
Tip Photographer Charter ATP Member I was one of the first 300 contributors to the plant database! Ferns
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Gymgirl
Dec 8, 2011 2:11 PM CST
I tip my hat to you.
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
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RickCorey
Dec 8, 2011 3:48 PM CST
I strongly agree with removing excess bottom water. That's always a good idea, especially if you do one heavy top-watering after a few eeeks, to flush excess salt or fertilizer builup in the pot.


Gymgirl,

Was your formula for starting with 3% peroxide, or 32-35% peroxide?
I am guessing you use "35%". Drug stores often carry both strengths.


BTW, here is another reccomendation for H2O2 strength,
for uses other than watering baby seedlings.


They seem to be suggesting 2-4 times what you use

0.1% to water or mist plants, to soak seeds, or wash seed sprouts
0.2% for spraying on sick or fungusy plants

starting with 3% H2O2:
0.1%
One and a half teaspoons of 3% peroxide per cup of water, or
1 ounce of 3% peroxide per Quart of water or
1/2 cup of 3% peroxide per gallon

0.2%
One TABLEspoon of 3% peroxide per cup of water, or
2 ounces of 3% peroxide per Quart of water or
1 cup of 3% peroxide per gallon


==
If you start with 32% or 35% peroxide, you might want to dilute a little of that by 1/10th and then use the above formula.
Or, from that same website,
0.1%:
2 teaspoons of 35% peroxide per gallon of water

0.2%:
1 tablespoon plus 1 teaspoonof 35% peroxide per gallon of water


from:
http://www.using-hydrogen-peroxide.com/gardening-with-hydrog...
Name: Linda
SE Houston, Tx. (Hobby) (Zone 9a)
"Godspeed, & Good Harvest!"
Region: Texas Vegetable Grower Seed Starter Garden Ideas: Master Level Canning and food preservation Gardens in Buckets
Tip Photographer Charter ATP Member I was one of the first 300 contributors to the plant database! Ferns
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Gymgirl
Dec 8, 2011 4:32 PM CST
Uh, Family Dollar brand, $3 a bottle? I DON'T KNOW WHAT STRENGTH IT WAS!!!!

aaaaaaaaaaarrrrrrrrrrrrrgggggggghhhhhhhh..... Crying Crying Crying Crying
Name: Kate
NEKingdom of Vermont (Zone 3a)
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LabourofLove
Dec 8, 2011 4:55 PM CST
35% hydrogen peroxide can and will burn you badly if spilled on your skin. It can cause irreversible blindness and can kill if swallowed. It is not to be messed with unless you are VERY careful (and must be kept locked up between uses because it is so caustic).
Kate Kennedy Butler
Glover, Vermont

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Name: Janet
Gilroy, CA
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imapigeon
Dec 8, 2011 6:31 PM CST
And it's really expensive, too!
Please visit the Clay Arts cubit

Anything worth doing is worth overdoing
Name: Linda
SE Houston, Tx. (Hobby) (Zone 9a)
"Godspeed, & Good Harvest!"
Region: Texas Vegetable Grower Seed Starter Garden Ideas: Master Level Canning and food preservation Gardens in Buckets
Tip Photographer Charter ATP Member I was one of the first 300 contributors to the plant database! Ferns
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Gymgirl
Dec 9, 2011 9:29 AM CST
Then, we're pretty sure I used 3%, huh? Lovey dubby
Name: Janet
Gilroy, CA
Charter ATP Member Bromeliad Tip Photographer I was one of the first 300 contributors to the plant database! Region: California Container Gardener
Garden Art Garden Ideas: Level 2 Lover of wildlife (Black bear badge) Irises Hummingbirder Heucheras
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imapigeon
Dec 9, 2011 6:03 PM CST
Yeah---the other stuff is definitely not available at any Dollar store I've ever frequented...LOL!
Please visit the Clay Arts cubit

Anything worth doing is worth overdoing
Name: Nancy or \"Hap\"
Ft. Lauderdale, FL
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Happy_1
Dec 12, 2011 8:08 PM CST
It's great for you hair.........LOL
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Name: Caroline Scott
Calgary (Zone 4a)
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CarolineScott
Dec 14, 2011 7:53 AM CST
Hydrogen peroxide is a great antiseptic for sterilizing flats before seeding.
I dilute the 3% stuff.
Chamomile tea contains an organic peroxide which does the same thing.
But here, Chamomile tea is more expensive, and I think it encourages algae and moss.

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