Thanks Sandy, I've spent a couple of N. hemisphere winters... I visited Ann Arbor Michigan many years ago and it was my most cold bitter experience that I ever went through! What I only remembers that days are grey in a row . Fortunately where I live our mild winters seldom means snow and are quite sunny. Going back to celeriac room means 10 inches spacing? Does the soil have to be towards wet? . Our celery spends the full cycle in our greenhouses. Our summers seem to be just too cool for successful growth ( I suppose that celery needs really long growing season). Our trials outside ended as you describe; we have just tried Tall Green Utah and I'm looking for a self blanching yellow stalked variety, So for celeriac, I'm supposing that they should be placed inside in one of our cooler inheated greenhouses. After trial and error we reached the conclusion that simple greenhouses accumulate enough heat to emulate lower altitude conditions ( we are about 2700 ft high), plus two other bonuses: it is much easier to control insects plus everything requires much less watering and edible tissues are much softer. Also under controlled conditions crops can be predictably planned which, then keeps the commercial wheel rolling....If I can be of help with your celery trials let me know!
