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Seed Germination: Oh, No! I have mold! Help!

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gardennanna
Litchfield, IL

March 26, 2014
3:14 PM

Post #9798583

All of my seedlings have been doing so well. I have transplanted many into 3 0r 4 inch pots. I also made some mistakes I've found. I put some of my pod seedlings into rectangular 10 cup peat pots. I put the long peat pods into the plastic trays. 5 across. Well now I see that many of them have a white moldy growth on outside of pots. I am sure I must have watered them too much as they are a mess. And they were doing so well!! I know I read somewhere about using peroxide solution but I need instructions. I have begun to take the seedlings out of those pots and put them in others but stopped because I wasn't sure what to do and I don't want to loose them.. If I knew how to attach pictures I would do so.

Thanks for any help for this beginner!

RickCorey_WA

RickCorey_WA
Everett, WA
(Zone 8a)

March 26, 2014
6:32 PM

Post #9798701

I'm not sure that mold can be "cured": most people talk about prevention. On the other hand, if the mold is only on the pots, and not on the stems, you might be lucky.

I have heard many people say they use peroxide stronger than this, but I've stayed on the "weak" side because I only use it for soaking seeds, not fighting fungus or mold. This site suggests 0.2% for sick or fungusy plants. Since you'll be spraying sides of peat pots, maybe you can go much stronger.

http://www.using-hydrogen-peroxide.com/gardening-with-hydrogen-peroxide.html

I assume you are starting with normal 3% "drugstore" peroxide (not the 35% food grade stuff).


1 cup water + 1 tablespoon of 3% HYDROGEN PEROXIDE
or
1 pint water + 2 tablespoons of 3% HYDROGEN PEROXIDE
or
1 quart water + 1/4 cup of 3% HYDROGEN PEROXIDE
or
1 gallon water + 1 cup of 3% HYDROGEN PEROXIDE

gardennanna
Litchfield, IL

March 27, 2014
6:35 AM

Post #9798985

Thanks so much. So far the mold seems to be on the outside of pots. Can I spray the plants with this peroxide mixture as well?

RickCorey_WA

RickCorey_WA
Everett, WA
(Zone 8a)

March 27, 2014
5:58 PM

Post #9799362

Stuff that dilute, sure. I've read many people talk about spraying seedlings with stronger peroxide, so this dilute stuff must be harmless.

I've only used it a few times and see no effect on plants. Pre-soaking seeds in a half-strength version does seem to make some old seeds sprout faster - I can't prove it but I do believe it.

Maybe a fan would keep the outsides of your peat pots a little drier and discourage the mold. Of course the pots and plants would dry out faster also.

I always use plastic pots or trays with cells since I tried a toilet-paper-roll collar around something and the cardboard became covered with white mold or fungus. Yuck!

gardennanna
Litchfield, IL

March 28, 2014
2:29 PM

Post #9799941

Yep that white mold or fungus is what I'm dealing with. Yucky for sure. My granddaughter and I peeled the little yucky pots off and repotted for hours today. I'll know better next year, I hope.
Doug9345
Durhamville, NY
(Zone 5b)

March 28, 2014
6:55 PM

Post #9800087

I detest peat pots for just this reason. They are either too dry or mold.
Ironsides
Eastlake, OH
(Zone 5a)

April 3, 2014
4:16 PM

Post #9804352

I agree with Rick, I use only plastic trays and plastic inserts. When the plants need transplanting, I use a clean tray and new deeper insert, to allow the plant room to grow. I through out the inserts, but use trays over after sterilizing with bleach and warm water. Air circulation is very important. I use fans for air circulation and to toughen the plants.

"Stay Happy and Keep Gardening"
ncredbird
Greeneville, TN
(Zone 6b)

April 3, 2014
4:23 PM

Post #9804359

DH is a big yogurt eater so I save all the empty individual yogurt cups and use them as pots. I just use a hot soldering iron to make a hole in the bottom for drainage. Depending on the size needed you can use dixie cups, empty medicine dispensing cups, and if someone is doing a food demo in your local Sam's or Costco just ask if you can have the empty plastic cups for seed starts. I use them all the time to set down cuttings and African Violet leaves. I haven't had good results with peat pots and the few that my mother gave me are headed for the trash can.

juhur7

juhur7
Anderson, IN
(Zone 6a)

April 4, 2014
6:22 PM

Post #9805105

After I posted this earlier , I read through this , Here's my 2 cents input .
Sometimes mold is not mold , it is the peat fiber trying to regenerate ,, (it could be argued moss is a mold ) however ,, presoaking and setting peat pots in a tray can sometimes help .
The half of the picture closest to you and what it is farther away and green ,, This happens a lot with moss and it will take a lot more light in humidity than most will have thought about (previously myself also ) ..
Well anyway the picture ,,

Thumbnail by juhur7
Click the image for an enlarged view.

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