Celeriac is a fairly low maintenance plant, but as we creep into autumn there are a couple of things you can do to make sure you get a great crop. Firstly, take a look at your celeriac plants. By now you can expect to see the tops of the crowns peeping above the surface of the soil.This will give you an idea of their size and maturity. At this time of year, you’d want to see that they are beginning to get to a decent size, perhaps the size of a golf ball or a bit bigger. You should remove some of the shoots and leaves from the outer edges of the crown to allow it to develop more fully. You’ll find you get bigger celeriac this way.
Secondly, as the weather starts to cool in October it is a good idea to mulch your celeriac to prevent the ground from getting too hard in the frosty mornings. Doing this will make it easier for you to harvest them as and when you are ready to. You can expect to harvest them anytime between late October and March (you can leave them in the ground until you want them).
That’s it. They really are hassle-free!