WHAT TO PLANT THIS MONTH: It's not too late to plant leeks, for harvest through the winter and into next May. Parsley planted now will last over the winter in the garden, barring three weeks under heavy snow (and even then it did come back from the roots) And it's not too late to start celeriac indoors, for transplanting into the garden when it's truly warm later in the month. It will last through next April.