How do I transition my garden from summer to fall in New Brunswick?

Transitioning your garden from summer to fall in New Brunswick is a gradual process that begins in late August and continues through October, involving strategic cleanup, planting fall interest, and beginning winter preparation while the growing season still has weeks of warmth remaining. Rather than a sudden transformation, think of it as a phased handoff where you're simultaneously winding down summer performers and setting up for fall beauty and winter readiness.

In late August, start by removing spent annuals and cutting back perennials that have finished blooming and look tired. Pull out bolted lettuce, spent bean plants, and any vegetable garden crops that are done producing. Cut back daylily foliage to about 6 inches once it starts yellowing. Leave plants that still look good or have interesting seed heads — black-eyed Susans, sedums, and ornamental grasses are just hitting their stride in September and provide essential fall and winter garden interest in NB.

September is the prime month for fall planting in New Brunswick. Plant spring-flowering bulbs like tulips, daffodils, alliums, and crocuses between early September and mid-October while the soil is still warm enough for root development. NB's acidic soil benefits from a handful of bone meal and a sprinkle of lime worked into each planting hole. This is also an excellent time to plant or divide perennials — the warm soil and cooling air temperatures create ideal root establishment conditions. Peonies, hostas, daylilies, and irises all transplant best in September in NB's climate.

Add fall colour to your garden with cold-hardy annuals and late-blooming perennials. Mums, ornamental kale, and pansies can handle NB's early frosts and will provide colour well into October. Place them in containers on porches and patios, or tuck them into garden beds where summer annuals have been removed. Asters and Japanese anemones bloom through September and October in NB's Zone 5 areas, while sedum 'Autumn Joy' transitions from pink to copper-bronze as the season progresses.

Begin structural winter prep in October. Move tender container plants indoors before the first hard frost (typically early to mid-October in NB). Dig up dahlia tubers, gladiolus corms, and canna rhizomes after frost blackens their foliage, and store them in a cool, dry location. Apply fall fertilizer to the lawn in September with a high-potassium formula. Start accumulating mulching materials — shredded leaves are abundant and free during NB's fall cleanup season, and they make excellent winter mulch for perennial beds.

Don't forget to capture the season's lessons. Take photos of your garden in September and October, noting what performed well and what struggled during the NB summer. This information is invaluable for making plant selection decisions and planning changes for next year. The summer-to-fall transition costs very little if you're doing your own work — mainly the cost of fall bulbs ($20-60) and mums or kale for colour ($3-8 per plant).

---

Find a Landscaping Contractor

New Brunswick Landscaping connects you with experienced contractors through the https://newbrunswickconstructionnetwork.com:

• Urban Landscaping Ltd ✓
• Leger Steel Roofing ✓
• Curb Appeal Construction & Landscaping ✓