so..just to see..I dug up my celeriac yesterday to see if it had produced anything. It's top growth looked very healthy, green, abundant.. its bottom was a matted huge ball of thin roots. Where did I go wrong?
I wondered about making soups out of the leaves but they tasted incredibly bitter and tough
Usually it's not enough water... if the root doesn't develop properly... (I know it's technically not a root) :-X
I cant grow them either but one chap on the site here swears by - lots of water, lots of nitrogen (you dont want to now where he gets that from!), and lots of heat - he always build a mini greenhouse made from old windows..
It's a perfectly reasonable source of nitrogen.... :-X
He saves his in plastic bottles!!!
ours were grown on plot 2 this year, they're huge. One of the deliveries of muck wasn't as well rotted as it should be so we planted courgettes and celeriac in the bed, the average picking from 1 courgette a week is 15 and huge celeriac, never watered at all, think they must like feeding :)