Can manure and/or compost be added now in Sept. to a 20 or so year-old boxwood or should it only be done in the Spring?
Live in Erin, Ontario between Georgetown and Rockwood/Guelph areas in zone 5b.
Thanks for checking in. Fall is a great time to add compost to your garden. In late fall, spread a good layer (10 to 15 cm if you haven’t done this for some years or 5-10 cm if you spread compost last year or this spring) all over the garden, not just around the boxwood, and over the months, the worms will drag it down into the soil. You can add your winter layer of mulch on top of the compost, once the ground has frozen.