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wilting brassicas - help!

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  • #1

    wilting brassicas - help!

    Hi - I wondered if anyone had advice for me. I am newish to growing veg and my brassica seddlings all germinate, grow to their first true leaves and then turn yellow and wilt. I attempted cauliflowers, sprouting broccoli and brussels sprouts last year and have calabrese, cabbage and kale seedlings this year which are turning the same way.

    I germinate them indoors and then move them to an unheated greenhouse. Due to the last week being particularly sunny, I wondered if they had overheated though? I have moved the least sickly ones into a cold frame but I think it may be too late.

    Where am I going wrong? I am beginning to wonder if I should cut my losses and plant something else in their space.
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  • #2
    Start them outdoors. Brassicas don't need the heat. Sow and put them straight into the cold frame.

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    • #3
      ahhh - so they were probably overheating int he greenhouse. Would you recommend to sow in modules or straight into a seed bed?

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      • #4
        Either to be honest [seed bed, modules, seed tray, pot].

        They were probably started too warm, and not hardened off before they went into the unheated greenhouse rather than unhappy about a too warm greenhouse.
        Last edited by zazen999; 24-03-2009, 01:21 PM.

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        • #5
          right -okay. The calabrese I have sown are in modules and have just started to show when I realised what had happened to the cabbages, so I moved them from greenhouse into cold frame yesterday. Hopefully I have caught them in time. Time will tell.

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          • #6
            I know it sounds strange , but perhaps try hardening them off?

            half a day in the greenhouse at night in the home? For a week or two. You won't be able to transfer them for about 6-8 weeks anyhow.

            I think the point being made is the shock to the plants is the variation in temperature in a short period of time, thus imagine going from a nice warm +15 degrees house to a -4+5degree cold house in the evening..

            Then build it up..

            Dave
            Just an Office Guy trying to grow own food

            http://www.allotment13.blogspot.com/

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            • #7
              I too have wilting Cauliflowers. I started mine in an unheated greenhouse, in modules and 90% of them germinated half All year round and half Alphas. Then I noticed yesterday that my all year rounds had started to wilt. Any ideas - too hot maybe?

              Walshie

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              • #8
                Originally posted by jennybain View Post
                my brassica seddlings all germinate, grow to their first true leaves and then turn yellow and wilt.

                Probably a totally dumb question, but what type of growing medium are they in? I've started all my stuff in the heated greenhouse and moved them to a warm polytunnel and everything's going great guns, but I use a peat based compost.
                http://norm-foodforthought.blogspot.com/

                If it ain't broke, don't fix it and if you ain't going to eat it, don't kill it

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                • #9
                  I used a non-peat based, the rest of my brasicas are okay but they havent produced there true leaves yet unlike the caulis which only started wilting when the true leaves appeared.

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                  • #10
                    How and with what are you watering them ? It could be damping off. Try sprinkling cinnamon powder on the soil, see if that helps.
                    There's no point reading history if you don't use the lessons it teaches.

                    Head-hunted member of the Nutter's Club - can I get my cranium back please ?

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                    • #11
                      Yellowing leaves could suggest to much water and being waterlogged.

                      Ian

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                      • #12
                        Just normal ground cinamon? They are being watered by sitting in a tray so it could be too much water. i repotted them in fresh compost and pots today and put them out in the cold frame - hope they survive. Sowed some new ones incase they dont.
                        Last edited by walshie; 25-03-2009, 08:04 PM.

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                        • #13
                          They shouldn't be sitting in water, Walshie.
                          Just give them a sit in it for about 5 mins, then drain the rest away.
                          I have my (flower) seedlings on a hot windowsill at the moment, and I'm only watering them sparingly about twice a week.

                          You can tell if they need watering, because the container feels light.
                          All gardeners know better than other gardeners." -- Chinese Proverb.

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                          • #14
                            I believe it's just normal ground cinnamon as you find in an Asian foods shop, Walshie. But I think Two Sheds has put his finger on the problem.
                            There's no point reading history if you don't use the lessons it teaches.

                            Head-hunted member of the Nutter's Club - can I get my cranium back please ?

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                            • #15
                              Two-sheds is a hot tottie girlie....


                              Sorry. I had logged out to go out but had to come back in for that. Gosh, I'm pedantic. I need to go out more often...talking of which I'm off.

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