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princessgardens

mold in seed tray

princessgardens
17 years ago

why am i getting mold in my seed trays? will this affect my seeds during germination? what can i do to prevent this from happening in the future? thanks

Comments (23)

  • User
    17 years ago

    princessgardens,

    I think you may be suffering from "damening off". I'm no expert but do a search on this term on this site and you'll find lots of advice.

    I think most call for going lighter on watering and using a fan for circulation to resuce risk. I'm sure more experienced folks will chime in shortly.

    Good luck,

    Bill

  • princessgardens
    Original Author
    17 years ago

    thanks i found some info but how do you prevent it when the seeds are covererd during germination?

  • User
    17 years ago

    Like I said, I'm no expert but... I've read on seed package instructions that you should apply "Captan" if you get mold? Never used it myself but it did come from a reputable seed company.

    I hope those with more experience will offer suggestions. If not, I suggest trying "Captan" on a few seperated cells to see if it works.

    Sorry I can't offer more suggestions.

    Bill

  • princessgardens
    Original Author
    17 years ago

    thanks again. any suggestions on soil medium.

  • User
    17 years ago

    I have used Miracle Grow seedling mix and potting soil. I'm leaning towards seedling mix mixed 50/50 with perlite lately.

    Not sure if you can get this brand in your area (I'm in Ontario, Canada). You should be able to find perlite though. Just mix it 50/50 with potting soil and you should do ok. Perlite is great for moisture retention so you can water less.

    Also, although not required for all seeds, a heating mat can be helpfull. My peppers and tomato seeds germinate well on a basic heating mat.

    Bill

  • User
    17 years ago

    princessgardens,

    How is the mold problem progressing? Have things improved?
    I think you jinx'd me! Since you posted I've developed a green moss (I'm hoping it's moss) on a few of my seedling trays.

    Transplanting to a drier location this weekend. Love green, but not on my soil!

    Bill

  • princessgardens
    Original Author
    17 years ago

    i'm sorry to hear that. i still can't get any seeds to germinate i have replanted with a different soil i hope i can get some plants ready in time.

  • karyn1
    17 years ago

    Are you by chance using peat pots? I've found that they're much more likely to get mold than plastic cells. You could spray a dilute mix of water and hydrogen peroxide 10:1 and see if that helps. I sometimes get a funky mold growing on the outside of peat pots. It goes away when the pots dry but returns after watering. It never seemed to bother the seeds/seedlings and they did fine when they were planted in the yard but it is kind of gross looking. Definitely use a fan for air circulation. If you are covering the trays you could remove the top and always take the cover off after your seeds germinate. By the way perlite is used to improve drainage not to retain moisture. I don't add any extra to my seed starting mix (pro-mix has enough already) but I do add it to all my container plant mixes. Good luck.
    Karyn

  • cityboygonecountry
    17 years ago

    I got mold every single time I tried using peat pots. I hate those things and I will never use them again.

  • pepcan
    17 years ago

    I agree peat pots are horrible. Always get mold. I use seed trays or old plastic pots that I wash up and re-use.

  • susanlynne48
    17 years ago

    I'm going to be repeating myself, but spray a weak solution of chamomile tea on the seedlings and that will prevent mold, fungus, and damping off.

    Susan

  • karyn1
    17 years ago

    Susan I've heard of using chamomile tea to prevent fungus, etc. Can I soak fresh chamomile foliage & blossoms instead of dried tea to make the solution?
    Karyn

  • celticjoshua
    17 years ago

    Karyn, you are just gonna love this. You are gonna have yourself a lil' tea party...YAY!! Ok, first boil your water, the you can use your "fresh" chammomile. Pour the the water over the fresh buds/leaves and let it steep for about 10 min. This way your get the oil out of it, b/c thats what is the fugicide. About a cup for you and a cup for the mixture is good, then mix with 3-4 parts per water to that one cup. That will be weak enough to work with. Just let it cool real well before spraying.

    I have worked with herbs for the body, so this is alright.

  • moonandtaiga
    17 years ago

    I have about ten or so trays started and everything is doing good except for the trays with peat pots. I'll never use them again, most of the seedlings perished from dampining off. Does anyone know what exactly is in camomile that makes it work as a fungicide.

    Thanks

  • janet_grower
    17 years ago

    Bill (Ottawapepper) I know its been awhile since your post, but I know what your green mold is and it is very easy to get rid of. You may have niticed by now some decline in the plants with the green mold. This is a pathogen that causes the soil to literally suffocate the plant roots because the film on top of the soil (green mold) creates a barrier on top of the soil and no oxygen can get to the roots. Simply take a sterile object such as a new popcycle stick or pencil and stir up the top of the soil, make sure to get all the corners, all of the surface. You should see improvements soon, do this to all the affected plants and look out for more in the future. Janet

  • nygardener
    17 years ago

    princessgardens, you said the seeds are covered during germination. Whether you're using humidity domes or placing plastic wrap right over the flats or pots, you need to air out the containers for half an hour to an hour once or twice a day. I've had seeds germinating under humidity domes for weeks and this airing-out procedure, especially if you use a small fan or open window (not on a freezing day!) for air circulation, keeps the mold from forming.

    Sow your seeds into seed-starting mix, not potting soil (although things often turn out OK with potting soil too). Keep it moist but not too wet. If the surface starts to dry off during airing-out, moisten it with a plant mister before putting the cover back on.

    If you follow these steps you shouldn't have any problems with mold or fungus.

  • princessgardens
    Original Author
    17 years ago

    thanks nygardener i think that will solve my problem i have been leaving them covered at all times with the plastic.

  • User
    17 years ago

    Hi Folks,

    OK, getting desperate here. This is my first year with a rampant mold problem and IÂve tried just about everything to control it except a store bought mold killer (like No-Damp) or a home made peroxide solution. Janet, thanks for the suggestion on mixing up the soil. It does help temporarly but the green and white strains I have seem to be quite insistent on returning (IÂve cut back on watering to the point the plants are parched and I have a fan running).

    Going to try the home made solution of nine parts water and one part peroxide. Does anyone know if this remedy really works and if so, is safe to use every day?

    Thanks,

    Bill

  • medontdo
    17 years ago

    i always use the hydrgen peroxide mix 10 parts water to 1 part peroxide to water my seedlings with and don't get mold. my tomatoes always turn out fine,

  • edenkeeper
    14 years ago

    Thanks so much for all the info on mold! I went to check on my seedlings this morning and was surprised to see that after only five days since planting some of them had emerged; but soon I was horrified to see the mold. This is the first time I have ever used the peat trays and first time for the problem. I have a fan on them now, uncovered of course, thanks again! And I plan to mist them with the peroxide/water solution. I hope it all works! Thanks again! I am a new member and looking forward to more conversations with you all!

  • rburton_ashevillenc_gov
    13 years ago

    I GOT IT TOO IT'S BEEN COLD HERE THANKS FOR THE ALL THE GOOD ADVICE AND RAINY

  • azmarcus
    13 years ago

    I am using both peat pots and a biodegradable egg carton...no mold on the peat pots, but the egg cartons have a spider-like white mold forming around the edges...I tried the 10-1 hp solution, so will see how that works. Thanks for all the good advice, also.