What should be on my fall garden winterization checklist for NB?

Your fall garden winterization checklist for New Brunswick should begin in mid-September and wrap up by late October, covering everything from soil amendments to physical plant protection before the ground freezes. NB's winters are long and harsh — with 250-300 cm of snow and temperatures dropping to -25°C or colder — so thorough fall prep makes the difference between a garden that bounces back in spring and one that suffers significant losses.

Start in September with a fall fertilizer application on your lawn using a high-potassium formula (such as 10-0-20 or similar). Potassium strengthens cell walls and improves cold hardiness, which is exactly what NB grass needs heading into winter. This is also the time to do final weeding in garden beds, cutting back spent perennials, and dividing any overcrowded plants. Leave ornamental grasses and anything with seed heads standing — they provide winter interest and wildlife value, plus their foliage helps insulate the crown.

In early October, focus on tender plants and bulbs. Dig up dahlias, gladiolus, and cannas after the first light frost blackens their foliage, and store them in a cool, dry location. Plant spring-flowering bulbs like tulips, daffodils, and crocuses between early October and mid-November while the ground is still workable. NB's acidic soil (pH 4.5-6.0) can be challenging for some bulbs, so work a handful of bone meal and a bit of lime into each planting hole.

Mid to late October is when physical winter protection goes on. Mound 10-12 inches of soil or compost around the base of hybrid tea roses, then top with mulch after the ground freezes lightly. Wrap vulnerable evergreens in burlap or spray with anti-desiccant to prevent winter burn from drying winds — this is especially important for arborvitae, boxwood, and rhododendrons in exposed locations. Apply 3-4 inches of shredded leaf or straw mulch over perennial beds once the ground has frozen to about an inch deep, which prevents the damaging freeze-thaw heaving cycle.

Don't forget infrastructure tasks. Drain and winterize irrigation systems by late October — burst pipes from frozen water are expensive to repair, and professional winterization typically costs just $75-150 in NB. Disconnect and store garden hoses, clean and oil tools, and drain fuel from gas-powered equipment or add stabilizer. Do a final leaf cleanup before the first major snowfall, as matted leaves on the lawn promote snow mold. Complete your final mow in October, cutting to 2.5 inches. A thorough winterization effort in fall saves both money and heartbreak when spring arrives.

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