Well I'm confused - Dianthus barbatus 'Green Trick' is sterile, doesn't produce seeds, and plants are propagated vegetatively, so if you've had seeds for this before, that's mystifying... More info below

http://mygarden.rhs.org.uk/blogs/graham_rice/archive/2012/05/27/dianthus-green-trick-new-from-thompson-amp-morgan.aspx

Hi bamboo
Thanks for info.
This plant was featured in a book.
I have been looking for the seed presuming that there was seed after talking to Thompson & Morgan who said that they do not have it any more.

Pancy

Hmm, well likely you were speaking to someone who wasn't that well informed, who just checked a stock seed list on the computer, saw that it wasn't listed, and just said they don't have it any more, knowing nothing about the plant anyway.

Hello again.
I will call T & G again.

Sarah Raven Stocks this Plant so I may purchase one from her.

Apparently this plant is stunning in the respect of its colour, and absolutely ideal for a bouquet etc .

Yes, it was actually developed for use by florists, good and unusual as a cut flower. You'll need to propagate using plant material if you want to keep it after 2 years...

hi
are you familiar with this plant, have you seen it?
I will try our local garden centres.

No, I've never seen it - to be honest, it doesn't appeal to me at all for more than one reason. I don't like green flowers much and I try not to plant sterile or double flowers because they are useless to pollinating insects such as bees, though I might use the occasional sterile plant. Doesn't mean you shouldn't grow them though if you like them, nothing wrong with difference!