Discover the best vegetables to plant in September in Boise, including lettuce, kale, Swiss chard, cabbage, beets, leeks and Brussels sprouts.

Fall Vegetable Gardening in Boise

August 24, 2026 | News

September is one of the best times to get a fall vegetable garden growing in Boise. As temperatures begin to cool, many cool-season vegetables actually thrive. Cooler days can mean less stress on plants, fewer watering demands, and in some cases, even sweeter, more flavorful harvests.

At FarWest Garden Center, we’ve got a fresh selection of fall vegetable starts ready to get your garden growing.

Fall Vegetable Starts Are Here

Looking to refresh your garden for the fall? Our new arrivals include:

  • Swiss Chard – A colorful, productive leafy green that handles cooler temperatures well.
  • Lettuce – Perfect for fresh salads and easy to grow for a quick fall harvest.
  • Kale – A cold-hardy favorite that can keep producing as temperatures drop.
  • Scallions – Easy to grow and a great addition to soups, salads, and everyday meals.
  • Leeks – A delicious cool-season crop that adds depth to soups and hearty fall dishes.
  • Cabbage – A classic fall vegetable that loves cooler weather.
  • Beets – Grow them for both the earthy, sweet roots and nutritious greens.
  • Brussels Sprouts – A fall favorite that develops best as the weather cools.

Why Plant a Fall Garden in Boise?

Cooler temperatures are easier on plants. Many leafy greens and root vegetables prefer the mild conditions of fall rather than the heat of a Boise summer. You may spend less time watering. As temperatures cool and days get shorter, plants generally lose moisture more slowly.

You can extend your harvest. Instead of saying goodbye to your vegetable garden after summer crops finish, replace them with cool-season vegetables and keep harvesting into fall.

Fall-grown vegetables can be incredibly flavorful. Cool temperatures can encourage crops like kale, carrots, and beets to develop a sweeter taste.

A Few Tips for Planting Fall Vegetables

Start with healthy soil

By September, your garden soil has already worked hard all summer. Before planting, remove spent summer crops and weeds, then refresh your soil with quality compost. If you’re planting into the ground, work the compost into the existing soil to improve structure, drainage, and overall growing conditions.

Give new plants plenty of water

Even though temperatures are cooling, newly planted vegetables still need consistent moisture while they establish their roots. Keep an eye on your garden and don’t let the soil completely dry out during those warmer September days.

Plant for the light

As the days get shorter, sunlight becomes increasingly important. Choose a location that receives plenty of direct sun to give your fall vegetables the best chance to thrive.

Harvest regularly

Don’t wait until everything is huge. Many leafy greens can be harvested gradually, allowing the plant to continue producing. Picking regularly can help you enjoy fresh vegetables throughout the season.

Don’t Pack Away Your Gardening Gloves Yet

Just because summer is winding down doesn’t mean your garden has to. September is a great opportunity to fill those empty spaces left behind by summer crops and keep your garden productive well into fall. Whether you’re planting a few containers of lettuce or filling an entire garden bed with cool-season crops, there’s still plenty of growing to do.

Stop by FarWest Garden Center in Boise to check out our new fall vegetable arrivals and get your garden ready for another season of fresh harvests.

 

FarWest Garden Center serves Boise and the surrounding Treasure Valley with plants, gardening supplies, and local gardening expertise.



Posted in News by client August 24, 2026