Brassicas I am having a nightmare!!!

[steve1967]

Hi All,

For some reason my brassicas are really struggling. The seed leaves have developed a purple tinge with no true leaves forming on most of them. They were sown 10th March moved to a heated greenhouse once they had germinated.

I have never had a problem like this before and would welcome any advice.

Thanks
Steve

[steve1967]

[Pescador]

Steve, Discolouration of the cotyledons could well imply that they have run out of food.
What compost did you use? I'd try giving them a soak of a general purpose liquid feed, such as Miraclegrow.
It is strange though, that they haven't produced any true leaves yet

[macmac]

Some of mine are the same,they are purple and white 
We bought B&Q compost ,the same as last year and most of our other stuff seems ok it#s just the savoys ?

[brown thumb]

Are they  too hot brassicas  lettuce dont like too much heat   

[antipodes]

I gave up doing brassicas under cover as I found they get too hot and they prefer some cooler conditions - I now wait (like, until this week!) and sow them under fleece in a seed bed outdoors, well watered. I think I have reasonable success with them, always getting good sprouts and broccoli and this year I also got caulis, only the cabbage didn't work for some reason. I transplant when they are about 20 cm high and have a few true leaves.

[Digeroo]

I had a problem with brassicas a couple of years ago.  I was advised here on A4A to feed them.  High nitrogen.  They took off.   

Now I buy more expensive compost.  Or use cheap and then mix 50/50 with recycled stuff.

[chriscross1966]

When I prick out the brassicas they get half a flat teaspoon of BFB in each cell of a 12-cell seed-tray sized module pack, one plant per cell, I use New Horizons organic compost (though last year I think I was using a mix of B+Q and Lidl).... I  put  adusting of lime in there too, there's probably no such thing as too much BFB for brassicas... they want to be not indoors as quickly as possible....