What to plant this week in Niagara Falls, ON
Niagara Falls gardeners are in the thick of late summer abundance, with your heavy harvest list including ripe Beefsteak Tomatoes, Zucchinis, and Watermelons as the air cools toward October 24. While the ground warmth allows you to sow heat-lovers like Okra and Malabar Spinach now, be mindful that night temperatures are creeping closer to the -5°F winter minimum threshold.
The next 7 days
Niagara Falls, ONGrowing in Niagara Falls right now
- The humid microclimate of the Falls region often stalls airflow around dense plantings; prune early this week to prevent Botrytis on your ripe tomatoes and peppers.
- Niagara's clay-heavy river valley soil retains water aggressively during rain events, so ensure drainage for any new sowings of Cleome or Zinnia to avoid root rot.
- With the first frost averaging October 24, apply a thick layer of mulch immediately around Brussels Sprouts and Rutabagas to protect roots from early autumn chills.
Sow this week
17 crops- Basil
- Borage
- Bush Bean
- Cleome (Spider Flower)
- Cucumber
- French Marigold
- Malabar Spinach
- Nasturtium
- Okra
- Pole Bean
- Scarlet Runner Bean
- Summer Savory
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Yellow Summer Squash
- Zinnia
- Zucchini
Transplant this week
Nothing is due to go out this week.
Harvest soon
58 crops- Anaheim (New Mexico) Pepper
- Banana Pepper
- Basil
- Beefsteak Tomato
- Beet
- Bell Pepper
- Borage
- Brussels Sprouts
- Bush Bean
- Cantaloupe
- Carrot
- Cayenne Pepper
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- Dahlia
- Edamame
- Eggplant
- Fennel
- Flour Corn
- French Marigold
- Garden Geranium (Zonal)
- Garden Verbena
- Garlic
- Honeydew Melon
- Jalapeño
- Lantana
- Lima Bean
- Malabar Spinach
- Marconi Pepper
- Nasturtium
- Okra
- Ornamental Sweet Potato Vine
- Parsley
- Parsnip
- Petunia
- Poblano Pepper
- Pole Bean
- Potato
- Roma Tomato
- Rutabaga
- Scallion (Bunching Onion)
- Scarlet Runner Bean
- Serrano Pepper
- Shiso (Japanese Basil)
- Snapdragon
- Summer Savory
- Sunflower
- Sweet Corn
- Thai Basil
- Tomatillo
- Tomato
- Vinca (Madagascar Periwinkle)
- Watermelon
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Succession sow bush beans and pole beans every two weeks for a continuous harvest throughout the summer.
- Mulch around young tomato and pepper plants to retain soil moisture as temperatures rise above 80°F.
- Thin carrot and beet seedlings now to prevent overcrowding and ensure sturdy root development.
Pest & disease watch
- Spider mites are exploding on stressed Tomato and Pepper foliage due to the combination of heat and humidity; blast plants with water in the morning.
- Aphids are returning to new growth on Pole Beans and Corn as temperatures drop, often protected by heavy leaf canopy.
- Late-season slugs will target soft leaves of Nasturtiums and Malabar Spinach near damp garden borders where drainage is poor.
Watering this week
Water deeply in the early morning to encourage deep root growth and reduce evaporation losses during this hot season.
Harvest sweet corn when the kernels are milky and firm, not yet hard or fully browned, for peak sweetness.
Niagara Falls gardening questions
3Can I still sow Okra or Yellow Summer Squash in my Niagara Falls yard this week?
Yes, the soil heat in our river valley zone 6b climate is sufficient to germinate these warm-season crops before the October 24 frost hits. However, start them immediately and consider using row covers for extra warmth as nights get cooler.
My Beefsteak Tomatoes are ripening fast; how do I protect them from a potential early frost?
Since our average first frost is mid-October, you can usually let the fruit finish on the vine if they aren't fully red yet. Cover individual clusters with clear plastic or cloche tunnels to trap heat and extend the harvest window safely.
Are there any vegetables I should transplant into my garden right now in Niagara Falls?
Currently, no cold-hardy transplants are recommended; focus instead on sowing warm-season seeds like Bush Beans or harvesting your existing root crops. Wait until after October 24 to pull up annuals and prepare the soil for winter cover cropping.
Other cities in zone 6b
12See the full zone 6b guide → · Plan your Niagara Falls garden in SproutGuide →