Though September is often still hot, gardeners are beginning to anticipate cooler weather. It's now we start to focus on planting cool season vegetables that will grow and produce during the fall, winter, and spring. September is a transitional month, with cool season vegetables going into the ground as warm season vegetables are remain in the garden.
Most warm season vegetables like tomatoes, cucumbers, squash, and peppers should have been planted back in August for fall production, but you can still sneak them into the ground this weekend if you have time.
Cool season vegetables are grown roughly from September through May. They need cooler temperatures to perform at their best. They can also tolerate below freezing temperatures.