Seedling problems

Hi,
I have been having some trouble with Brassica seedlings.

I have tried sowing them in various composts from John Innis seed compost to ordinary multipurpose organic peat free, but although the seedlings germinate they seem to die.

I have tried with and without vermiculite - no difference.

I have an electric propogator, and use this to germinate the seeds quite sucessfully.

What am I doing wrong please?

The last lot I tried were in Mole hill soil, and these are at the seedling stage when I would normally transplant, but I'm loath to do thhis in case they die again.

What size should they be to transplant, and what method should I use?

Thanks

Dave

 

Hi Dave,

Sorry to hear about that. Are your seedlings being kept on a window sill in direct sunlight ? They might have got too hot. Brassicas don't need high temperatures after they have germinated.

I usually pot them on when they've got true leaves, past the seed leaf stage.

 

Hi,
Thanks for replying,
No, but I do keep them in the greenhouse.
This last lot are outside in a cold frame at the moment...and OK albeit a bit leggy.