What To Plant In September In Gardening Zone 6b

Sharing is caring!

What to plant in september in gardening zone 6b. fall gardening. planting in the fall and season extension of harvest

Big List of Vegetables You Can Plant In Gardening Zone 6b In September


So, it’s late in the gardening year and you’re wondering if you can still plant stuff!??? Here is a huge list of vegetables you can plant in the garden in September if you live in gardening zone 6b. 

Don’t know what the heck a gardening zone is? {We’ve all been there} Look here to find out what gardening zone you’re in. 

Related: { When to Plant What In Your Garden }

Okay, so September seems too late to plant a garden for most people, but it’s simply not true. There are still a lot of fall vegetables that are most happy in the cooler weather autumn brings and September is the optimal time to plant them. 

We’re talking hearty brassicas for winter soups and stews, casseroles, and delicious side dishes. Lettuce, and other salad greens for crisp salads that grocery store greens can’t even begin to compare to. And root vegetables sweeter than any other time of the year. Yes, fall has much to offer in the way of garden produce, so let’s get started!

What to expect out of vegetables planted in September in zone 6b

Here in gardening zone 6b our average first frost is October 31. That can vary widely from year to year, and also, the closer you are to the “line” for warmer or colder gardening zones. 

But, October 31 is a good average to plan for the first frost.

The first frost matters because that tells you how long your vegetables have to mature before that frost

… In other words, tomatoes and peppers are out for your September planting list! 

But, not to worry, there are still plenty of great things to plant this month.

Plant vegetables in September that thrive in the cold

When planning what to plant in September in gardening zone 6b you will have the most success with plants that either tolerate or love cooler temperatures. 

Brassicas like cabbage, broccoli, and Kale love cooler weather. Most salad greens and lettuce not only thrive in cooler temperatures but taste oh-so-good when picked in very crisp weather. Also, radishes and carrots along with some other root vegetables are great candidates for September planting in this area.

Take the amount of time until harvest into consideration

Don’t forget to take into account the amount of time the vegetable takes to mature (and harvest) This is especially true of warmer season crops. Green beans, for instance, can take 50-65 days to mature. If you plant them September 1 that only gives you 60 days until the average first frost. Green beans tend to start a bit slow and then boom, they’re all there, so in reality, to get a good harvest you would need a bit longer. 

Another factor when planning time until harvest in the fall is the amount of daylight. As the days get shorter, the amount of days a plant will take to mature gets longer. It can get a little complicated. 

That’s why I love this fall garden calculator

The fall garden calculator by Seeds for Generations does all that tricky work for you. All you need to do is plug in your first frost date and up comes a list of all the vegetables you can still plant and when the last day to plant them is. Super easy.

Plan ahead for extending your harvest throughout the winter

The last thing to consider when planning what to plant in September if you live in gardening zone 6b is if you will be extending your harvest.

Extending your harvest for heat-loving plants

If you did decide to plant those green beans on September 1st you would need to plan a bit to make it a success. First of all, you need to plan for a surprise early frost. Sometimes they happen. It frosts one night and then it’s super warm again… for weeks! 


In this case, you would simply need to provide a covering to protect your plants from the frost overnight. A light sheet or large piece of plastic would do. 

#1Just be sure that it’s supported well and won’t be pushing down on your plants. 

#2 Be sure to remove it early the next morning when the sun comes out (the sun can warm things up quite fast under plastic)


In some cases, one or two nights covering can extend your harvest clear into November!


Extending your harvest for cool-season crops

The next kind of season extension to consider when planning what to plant in September in this area is a plan to keep harvesting those cold-loving plants clear into the winter!

Lettuce is surprisingly hearty to cold and frost on it’s own. When you give it just a little protection you could be eating delicious salads in January and Februrary! 


Legal disclaimer:

>>>this is in no way a guarantee. I have zero control over the weather. I am not a meteorologist, nor is this meteorological advice. I am only telling my own experiences as a gardener and am in no way responsible for death of your plants by freezing.


Had to get that out of the way. Gardeners are very serious about their harvests!


In most cases, in gardening zone 6b, any kind of covering for lettuce, salad greens, spinach, radish and carrots, etc, can offer enough protection against freezing to keep you harvesting them all winter long. This can be a clear plastic tarp held up above the plants by PVC or some other structure or you can go all out with a wind tunnel or greenhouse! 

The variables for how thick your plastic needs to be or other measures to hold in warmth include the actual temperature along with dampness and wind chill.

In general, a head of lettuce that is planted anytime in September can be harvested as baby greens by the end of September, or as a mature head of lettuce throughout the following months because the cold will keep it from bolting and in perfect eating condition almost indefinitely. 

What to plant in your garden in September in Zone 6b

Big planting list for September 

Root vegetables:

  • Onions – to harvest as green onions or scallions
  • Beets
  • Carrots
  • Kohlrabi
  • Radishes
  • Turnips – small, salad type turnips


  • Parsley – not only does parsley withstand a lot of cold, it comes back early in the spring!
  • Cilantro

Salad Greens:

  • Snow peas can be grown in September if the weather cooperates. However, I love to grow them for their greens. You just harvest them when they are about 8″ tall for a tasty addition to salads, slaws, and stir-frys!
  • Lettuce
  • Salad greens – Spinach, Arugula, Asian Greens, Chard

Brassicas –as transplants only:

  • Broccoli
  • Cauliflower 
  • Kale
  • Cabbage
  • Collards

Pin this post on What To Plant In September In Gardening Zone 6b for later

What to plant in september in gardening zone 6b. fall gardening. planting in the fall and season extension of harvest

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.