What to plant this week in Fredericton, NB
Fredericton gardeners are in the thick of summer heat with an average last frost date of May 8 behind them, making this your final sprint before the Oct 8 first frost ends the growing season. With nights cooling down rapidly and humidity rising, it is critical to lock in those warm-weather harvests like Ghost Peppers and Watermelon while protecting tender starts from early chill.
The next 7 days
Fredericton, NBGrowing in Fredericton right now
- Fredericton's clay-heavy river valley soil retains moisture well but drains poorly during our frequent summer rainstorms; amend heavy beds with compost to prevent root rot in your expanding Zucchini and Pumpkin patches.
- Our terrain often traps cold air in the Red Banks lowlands, so consider building raised beds or using black plastic mulch to warm the ground for your late-sown Garlic and Parsnips.
- Rainfall is erratic this week; capture runoff from downspouts into barrels to supplement irrigation for thirsty Cucumber vines that are vulnerable to drought stress right now.
Sow this week
No direct sowing windows open this week.
Transplant this week
Nothing is due to go out this week.
Harvest soon
46 crops- Basil
- Beefsteak Tomato
- Bell Pepper
- Borage
- Brussels Sprouts
- Bush Bean
- Cantaloupe
- Celery
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- Dahlia
- Edamame
- Fennel
- Flour Corn
- French Marigold
- Garden Verbena
- Garlic
- Ghost Pepper (Bhut Jolokia)
- Gourd (Ornamental/Bottle)
- Habanero Pepper
- Honeydew Melon
- Leek
- Lima Bean
- Lisianthus (Prairie Gentian)
- Loofah (Luffa)
- Nasturtium
- Ornamental Sweet Potato Vine
- Parsnip
- Pole Bean
- Potato
- Pumpkin
- Scarlet Runner Bean
- Shiso (Japanese Basil)
- Summer Savory
- Sunflower
- Sweet Corn
- Thai Basil
- Tomatillo
- Vinca (Madagascar Periwinkle)
- Watermelon
- Winter Squash
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Begin succession sowing quick-maturing crops like Bush Beans or Lettuce to extend your harvest before the first frost on October 8.
- Apply a thick layer of straw or leaf mulch around perennial roots and Brassicas like Brussels Sprouts to protect them from early cold snaps.
- Prune back any leggy Summer Savory or Garden Verbena now to encourage fresh growth once temperatures stabilize after the frost.
- Start planning your spring garden by ordering seeds for crops that need a long head start, such as Garlic for next fall planting.
Pest & disease watch
- Monitor closely for Aphids on your newly transplanted Basil, Shiso, and Tomato varieties as humidity spikes trigger rapid colony growth.
- Watch for Squash Vine Borers attacking the leaves of Bush Beans and Yellow Summer Squash, especially after heavy thunderstorms soften plant tissues.
- Check for early signs of Powdery Mildew on Celery and Fennel stems; apply a baking soda spray if white dust appears before harvest.
Watering this week
Reduce watering frequency but increase volume deeply to help plants build frost resistance before the October chill sets in.
Harvest Garlic now if it has finished curing to ensure you get a full bulb before the ground freezes hard.
Fredericton gardening questions
3Can I still transplant Garlic into the garden now in Fredericton?
Yes, while late, you can plant hardy varieties like those listed for your fall bulb crop to get a head start on next spring's growth. Ensure you place them at least four weeks before the Oct 8 frost date so they establish roots without freezing.
My Watermelon and Cantaloupe vines are sprawling wildly; how do I manage them in my small Fredericton yard?
Use trellises or overhead netting to keep fruit off damp ground, which reduces rot risk during our wet summers. Prune back some lower leaves to improve air circulation and direct energy toward ripening the melons before the frost hits.
When is the best time to harvest my Beefsteak Tomatoes and Bell Peppers this week?
Harvest ripe red tomatoes immediately as heat can accelerate softening, but leave green peppers until they turn fully colored to maximize flavor. For overripe fruit, cut them off carefully to avoid damaging the remaining vine structure.
Other cities in zone 5a
6See the full zone 5a guide → · Plan your Fredericton garden in SproutGuide →