Gardening in Saint John, New Brunswick in November

By November, Saint John has usually experienced its first frost, which typically arrives in October. The gardening season shifts from growing to preparing for winter and next spring.

What You Can Still Do in November

Plant Garlic

November is an excellent time to plant garlic cloves. They will establish roots before winter and emerge early next spring.

Plant Spring-Flowering Bulbs

If the ground isn’t frozen, you can still plant:

• Tulips
• Daffodils
• Crocuses
• Hyacinths

These bulbs need winter chilling to bloom in spring.

Mulch Perennials

Apply 5–10 cm (2–4 inches) of mulch around:

• Hostas
• Daylilies
• Peonies
• Roses

Mulch helps protect roots from freeze-thaw cycles.

Clean Up Garden Beds

Remove:

• Dead annuals
• Diseased plant material
• Weeds

Leave some leaf litter and seed heads for birds and beneficial insects.

November Harvests

You may still harvest hardy crops such as:

• Kale
• Brussels sprouts
• Parsnips
• Carrots (if mulched)
• Leeks

Many of these actually improve in flavor after light frosts.

Protect Plants for Winter

• Wrap young trees against rodent damage.
• Add compost to empty beds.
• Move tender container plants indoors.
• Drain hoses and rain barrels before freezing temperatures arrive.

Saint John Gardening Tip

The Bay of Fundy gives Saint John one of the longest growing seasons in New Brunswick, but by November soil temperatures are dropping quickly. Focus on garlic, bulbs, mulching, cleanup, and winter protection rather than new vegetable planting.

Best November projects for Saint John gardeners:

1. Plant garlic.
2. Plant spring bulbs.
3. Mulch perennial beds.
4. Protect roses and shrubs.
5. Add compost and prepare next year’s garden plan.

October is one of the busiest gardening months in Saint John. The growing season is winding down, but it’s an excellent time to prepare your garden for winter and get a head start on next spring.

🍂 What to Do in October

Plant Spring-Blooming Bulbs

October is ideal for planting:

• Tulips
• Daffodils
• Crocuses
• Hyacinths

Plant them before the ground freezes so they can establish roots before winter.

Plant Garlic

Garlic is one of the best crops to plant in October in southern New Brunswick.

• Plant individual cloves 2–3 inches deep.
• Cover with mulch after the ground cools.
• Harvest next summer.

Clean Up Vegetable Gardens

• Remove dead tomato, bean, and squash plants.
• Pull weeds before they go to seed.
• Add healthy plant material to your compost pile.

Protect Perennials

After several hard frosts:

• Cut back diseased foliage.
• Leave some seed heads for birds.
• Apply mulch around sensitive plants.

Improve the Soil

Fall is an excellent time to:

• Add compost
• Spread aged manure
• Mulch garden beds

Winter weather helps work organic matter into the soil.

🐦 Support Wildlife

Consider leaving:

• Coneflower seed heads
• Sunflower heads
• Ornamental grasses

These provide food and shelter for birds throughout the winter.

🌡️ Typical October Weather in Saint John

Typical conditions include:

• Average highs: 10–14°C
• Average lows: 2–6°C
• First hard frost often occurs during October
• Increasing rainfall and occasional early snow flurries late in the month

Garden Planning for Next Year

October is also a great time to:

• Record what grew well this year.
• Sketch next year’s vegetable garden.
• Order seed catalogues.
• Divide overcrowded perennials.

For Saint John gardeners, October is less about harvesting and more about setting up a healthy, productive garden for spring 2027. 🌷🧄🍁

Tips for Buying Fall Mums

Fall mums are one of the easiest ways to add colour to your porch, garden or entrance as summer fades. But not all mums are equal. A little care when choosing them can mean weeks of extra colour.

1. Look for lots of unopened buds

Choose a plant with many buds that are just beginning to show colour rather than one that is already in full bloom. It will usually give you a longer display.

2. Check the foliage

Leaves should be deep green, full and healthy-looking. Avoid mums with:

• Yellow or brown leaves
• Wilting foliage
• Large bare areas
• Spots or signs of disease

3. Inspect underneath the leaves

Turn the plant over and look for aphids, spider mites or other insects. Also check for sticky residue or webbing.

4. Choose a compact, full plant

A good mum should look bushy and well-filled, not tall, thin or stretched. The stems should be strong enough to support the flowers.

5. Check the soil

The soil should be slightly moist, not soaking wet and not bone dry. Avoid plants sitting in containers full of stagnant water.

6. Consider your location

For Saint John and coastal New Brunswick, look for hardy garden mums if you want to try planting them in the ground. However, even hardy mums can have difficulty surviving winter if planted late in the season because their roots may not have enough time to establish.

7. Think about where you’ll put them

Mums generally perform best with several hours of sunlight. A sunny porch, step or garden bed will usually produce better colour than a heavily shaded location.

8. Don’t be afraid of smaller plants

A smaller mum covered in unopened buds can actually provide more value over time than a large plant already at peak bloom.

9. Pick colours that work together

Traditional fall combinations include:

• Orange and yellow
• Burgundy and red
• Purple and white
• Bronze and gold

For a classic Atlantic Canadian autumn look, bronze, burgundy, yellow and orange work particularly well with pumpkins and fall foliage.

10. Protect them from an early frost

Mums can tolerate cool fall weather, but a hard frost can damage open flowers. If you’re keeping potted mums outside, moving them into a sheltered area overnight during an unusually cold spell can extend their display.

My simple buying rule: Lots of buds + healthy green leaves + compact growth + moist soil = a good mum to take home.

For Saint John, I would also pay attention to the weather forecast before buying a large number of mums, because a sudden frost can arrive quickly in late September or October.

 

Gardening in Saint John, New Brunswick in September

September is one of the best gardening months in Saint John. Days are still mild, the soil is warm, and the average first frost typically doesn’t arrive until early October, giving gardeners several productive weeks to harvest and prepare for fall.

What to Harvest

September is peak harvest season for:

• Tomatoes
• Peppers
• Beans
• Cucumbers
• Zucchini and squash
• Potatoes
• Onions
• Garlic
• Herbs

Many gardeners also continue harvesting kale, lettuce, spinach, and other cool-season greens.

What You Can Still Plant

For quick fall crops, try:

• Spinach
• Lettuce
• Radishes
• Turnips
• Beets (baby beets)
• Green onions

These cool-weather crops often grow well in Saint John’s maritime climate and can tolerate light frosts.

Flower Gardening

September is an excellent time to:

• Plant spring-flowering bulbs (tulips, daffodils, crocuses)
• Divide and transplant perennials
• Plant new trees and shrubs
• Add fall colour with mums and ornamental kale

The warm soil helps roots establish before winter arrives.

Garden Maintenance

September jobs include:

• Removing diseased plant material
• Collecting seeds from annual flowers
• Adding compost to beds
• Mulching around perennials
• Beginning to cure onions and garlic for storage
• Watching weather forecasts for early frost warnings

Saint John’s coastal climate can delay frost compared with inland New Brunswick, but it’s wise to keep row covers handy by late September.

Looking Ahead to October

Early October is the traditional time in Saint John to plant hardneck garlic for next year’s harvest. Many local gardeners consider garlic one of the most reliable crops in the region.

Typical September Weather in Saint John

• Average daytime highs: 16–20°C
• Cool nights: 7–11°C
• Increasing chance of fog and rain
• Usually frost-free through most of the month

These conditions are ideal for cool-season vegetables and for establishing perennials before winter.

A well-planned September garden in Saint John can keep producing fresh vegetables right into October and sometimes November with simple frost protection.