Gardening Questions Cosmos from seed

I don't know the answer, but thoght it might make you feel better when i say that mine have done exactly the same.

Mine germinated quickly, they are very tall and weedy looking as if too much heat and light. I havent anywhere cooler than the present north facing conservatory to move them to...unless I pop them into a cold frame but that seems too chilly doesnt it?

I'll be interested to hear what others say!

I grew these last year and found that I had to prick them out much sooner than all the other seedlings. They were fine once I'd done that (in an unheatedgreenhouse by the way) and I ended up with so many that I was practically begging people to have a few! I am about to sow a different type - red/orange in colour and not as tall as the usual ones. I am looking forward to seeing how they do!

I have also just sown some of the `Cosmos bipinnata` in a cold greenhouse, I think they should be ok although I too wasn1t sure if it was too cold, but I`m sure I grew them the same last year.
I got the seed from the RHS site in January along with lots of other seeds which I am trying, does anyone else take advantage of the seeds availbale from RHS?

Yes - I got some for the first time this year. I haven't planted any yet. We will have to compare notes as to how we do.

My cosmos have also shot up. think this is normal - they do this every year! I don't think you need to keep them in the heated propagator now they are up and growing - put them where they will get plently of light (so they don't have to stretch for it) and just keep them frost free. Mine are in an unheated greenhouse, but I do bring them indoors when the nights are frosted.

Thanks everyone. Your replies are very reassuring. I'll keep you informed of progress.