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Before I started gardening, I believed the growing season began in spring and ended when summer was over. Once the weather started cooling down, I assumed there was nothing left to plant. A lot of new gardeners think the same way, including the person who first inspired me to grow food, my stepfather.
He has eight mango trees growing in his backyard, and I helped him plant one of them. When I recently asked whether he was ready for Fall planting, he told me it was already too late because cooler weather was coming. I immediately said, “No!” Cooler weather does not mean gardening season is finished. In many ways, September marks the beginning of an entirely new growing season.
If you are new to gardening, unsure whether you have a green thumb, or skeptical about your ability to grow food, Fall can be a wonderful time to begin. Many leafy greens, root vegetables, and brassicas prefer cooler conditions and may struggle less once the intense summer heat begins to fade. Here in Georgia, however, September can still be hot, so knowing what to start indoors, direct sow, or purchase as a transplant is important.
In this guide, I’m walking you through what to plant in September in Georgia for a Zone 8 Fall garden. We’ll cover leafy greens, brassicas, root vegetables, onions, and herbs, along with practical tips for choosing the right planting method. Exact timing can vary, even within Zone 8, so pay attention to your local temperatures and expected first frost as you plan your garden.
September Can Feel Like a Second Spring
September can feel like a second spring because the garden gets another opportunity to begin again. Your tomatoes, peppers, okra, and other warm-season plants may still be producing, but at the same time, you can begin preparing leafy greens, root vegetables, and brassicas for the cooler months ahead. One gardening season does not have to end completely before the next one begins.
As temperatures gradually cool, many Fall vegetables experience less heat stress. The soil may not dry out as quickly, plants may require less frequent watering, and crops such as kale, collards, carrots, and broccoli can grow under conditions they naturally prefer. Some leafy greens and root vegetables may even develop a sweeter flavor after exposure to cooler temperatures.
That does not mean September gardening is completely effortless. Here in Georgia, daytime temperatures can remain very warm well into the month. Newly germinated seeds and tender seedlings may still face intense sunlight, heavy rain, drying soil, and garden pests.
This is why September is a transition month. You may be harvesting from your summer garden, starting Fall seedlings indoors, and preparing containers at the same time. Instead of looking at this season as the end, think of it as your opportunity to reset, reorganize, and grow a new round of food.
Grow What You Will Actually Eat
Before buying seeds or filling containers, think about what you and your household will actually eat. Seed catalogs and garden centers can make every variety look exciting, but growing food requires soil, water, fertilizer, space, and time.
Experimenting is part of gardening, but you do not need to fill your entire garden with vegetables you have never eaten. Start with foods you already purchase and enjoy.
Ask yourself:
- Which vegetables do I buy regularly?
- What does my household enjoy eating?
- Which produce costs the most at the grocery store?
- Which crops can provide multiple harvests?
- How much growing space does each plant require?
- Do I know how I will prepare or preserve the harvest?
You can still reserve space for one or two experimental varieties. However, making familiar foods the foundation of your garden increases the likelihood that your harvest will be used.
One of the easiest ways to choose what to plant in September is to begin with what is already on your grocery list.
Start Indoors, Direct Sow, or Buy Transplants?
Not every Fall crop should be started the same way. Some seeds benefit from the protection of an indoor setup, while others perform best when sown directly where they will mature. If time is running short, purchasing transplants may be the better option.
To keep your September planting organized, divide your crop list into three categories.
Start indoors
Starting seeds indoors gives you more control over moisture, light, and temperature. It can also protect young seedlings from:
- Intense September sunlight
- Heavy rain
- Quickly drying soil
- Pest pressure
- Unpredictable outdoor germination
Crops I prefer to start indoors include broccoli, cauliflower, cabbage, kale, collards, mustard greens, lettuce, bok choy, and onions. Several of these can also be direct sown when outdoor conditions are favorable, but indoor starting works better for my garden and gives the seedlings time to become established.
Direct sow
Some crops are easier to plant directly in their permanent container or garden bed. This is especially true for root vegetables that may be damaged or distorted when their roots are disturbed.
Good direct-sow options include:
- Carrots
- Radishes
- Turnips
- Rutabagas
- Parsnips
Beets can be direct sown or transplanted carefully, but direct sowing is often the simpler choice for beginners.
Purchase transplants
Buying established plants can help when:
- You did not start slow-growing crops early enough
- Your Fall growing window is limited
- You do not have room to start seeds indoors
- You want a faster and simpler beginning
By September, broccoli, cabbage, and cauliflower may need to be purchased as transplants if you have not already started them from seed.
Before planting, create three lists: start indoors, direct sow, and purchase as transplants. This small step can make the transition from your summer garden to your Fall garden feel much more manageable.
Leafy Greens to Grow in September
Leafy greens are some of the best crops to add to a September garden. Many grow quickly, tolerate cooler temperatures, and allow you to harvest leaves more than once. I am growing several varieties this season so I can compare their appearance, flavor, texture, and productivity.
Kale
The three kale varieties I am growing are:
- Lacinato kale
- Curly kale
- Black Magic kale
I added Black Magic after receiving a grocery delivery from Whole Foods that included some of the largest, darkest, and most deeply textured kale leaves I had ever seen. I wanted something similar growing in my own garden, so I immediately began searching for the variety.
Kale can be started indoors, direct sown when outdoor temperatures are suitable, or purchased as a transplant. The seeds usually germinate quickly. Once they emerge, provide strong light and gentle airflow to prevent the seedlings from becoming weak or leggy.
When the plants mature, harvest the larger outer leaves while leaving the center intact. This allows the kale to continue producing instead of removing the entire plant at once.
Mustard greens
I am growing Chinese Giant Leaf mustard and Southern Giant mustard. The varieties are noticeably different in their leaf shape, texture, and shade of green.
Mustard greens grow quickly during cool weather and can be harvested as tender baby greens or allowed to develop into larger cooking greens. Keep the soil consistently moist while the seeds are germinating and while young seedlings become established.
Because mustard greens can provide relatively fast harvests, they are a good choice if you want to begin picking food before slower Fall crops mature.
Lettuce
This season, I am growing Buttercrunch and Bibb lettuce. Lettuce has been one of the crops I have struggled to germinate in soil, so I start mine hydroponically. I use only water during germination, allow the seedlings to grow for approximately two weeks, and then move them into the garden.
That is the method that currently works for me, but lettuce can also be started indoors in seed-starting mix or direct sown outside. The best option depends on your weather and growing space.
September temperatures in Georgia can remain in the 80s or 90s. Lettuce seeds may struggle to germinate in hot soil, and young plants can become stressed in full sun. If your garden is still extremely warm, consider starting lettuce indoors or using an outdoor area that receives some afternoon shade.
Instead of planting all your lettuce at once, sow a small amount every one to two weeks. This succession-planting method can help prevent every head from becoming ready at the same time.
Swiss chard
I am growing Fordhook Swiss chard. This is one of the vegetables I had never eaten before starting my garden, but it has since become one of my favorites.
Swiss chard is a cut-and-come-again crop. Harvest the larger outer leaves and allow the younger leaves in the center to continue developing. It can also tolerate a broader range of temperatures than some other greens.
Indoor seedlings need consistent moisture, strong light, and airflow. Check their containers regularly because small seedling cells can dry out quickly.
Bok choy
Bok choy is fast-growing, delicious, and forgiving, which makes it approachable for beginners. You can harvest the outer leaves over time or wait until maturity and cut the entire head.
The main challenge is heat. Bok choy can bolt quickly when it experiences warm temperatures, causing the plant to flower before producing the harvest you expected.
My plan is to start bok choy indoors around the middle of September, grow it under lights for approximately three weeks, and then transplant it after outdoor temperatures become more comfortable. Avoid keeping it crowded indoors for too long. Aim to transplant healthy seedlings around the three- to four-week stage, depending on their growth and the weather.
Collard greens
The collard varieties in my Fall garden are:
- Georgia Southern Giant
- Morris Heading
- Vates
Collards germinate fairly quickly when their growing medium remains consistently moist. Do not worry if different varieties grow at slightly different rates, even when they were planted on the same day.
Mature collard plants become wide and robust, so give them enough room. This is especially important in containers and grow bags. Avoid squeezing several plants into a container that cannot support their mature size.
Once established, harvest the lower outer leaves and leave the growing center untouched. With proper space and care, one collard plant can continue supplying leaves throughout the cool season.
Brassicas to Plant in September
Broccoli, cabbage, and cauliflower are cool-season brassicas that require more time to mature than many leafy greens. Ideally, these crops should be started indoors before September in Zone 8. If you have not started your seeds yet, begin immediately or consider purchasing established transplants.
When choosing a variety, check the “days to maturity” on the seed packet. A faster-maturing variety may be more practical if your Fall growing window is already moving quickly.
Cabbage
I am growing several cabbage varieties this season:
- Golden Acre
- Bravo
- Red cabbage
- Copenhagen Market
Growing multiple varieties gives me an opportunity to compare their color, head size, growth rate, and performance in containers.
Cabbage seedlings may look small at first, but the mature plants develop large outer leaves before forming heads. Give each plant enough room and avoid overcrowding them in a container. Crowded plants compete for light, water, nutrients, and airflow.
Broccoli
Timing is especially important when growing broccoli. If plants are exposed to excessive heat, the heads may form loosely or begin flowering before they become dense and mature.
My broccoli seedlings were started indoors, and I plan to transplant them around the third week of September, depending on the weather. Before transplanting, I will gradually harden them off so they can adjust to outdoor sunlight, wind, and changing temperatures.
As broccoli seedlings grow, their small containers may dry out faster. Lift each cup to check its weight, touch the soil, and water before the seedlings become severely wilted.
Cauliflower
Cauliflower has been the most challenging brassica in my garden. This will be approximately my third attempt at growing it. I have successfully reached the stage where a white head formed, but mold prevented me from harvesting it.
This season, I am growing Snowball cauliflower along with another white variety. Cauliflower can be sensitive to:
- Heat
- Moisture fluctuations
- Poor airflow
- Root stress
- Delayed harvesting
Some white cauliflower varieties require blanching, which means loosely covering the developing head with its leaves to protect its color and quality. Other varieties are self-blanching. Always check the seed packet before tying the leaves, and avoid trapping moisture around the head because that can encourage rot.
Inspect cauliflower frequently once the head begins forming. Look for insects, discoloration, spreading florets, or signs of moisture damage. Harvesting at the proper stage may be the difference between finally bringing that cauliflower inside and losing another head in the garden.
Root Vegetables to Direct Sow
Root vegetables are usually best planted directly in the container or garden bed where they will mature. Starting them indoors and transplanting them can disturb the developing roots, which may lead to stunted, forked, or misshapen vegetables.
Carrots
I recently direct sowed carrots in a grow bag, and many of the seeds have already germinated. The next important step is thinning them.
Carrot seeds are tiny, so it is easy to sow them too closely together. However, crowded seedlings will compete for space and may not develop full-sized roots. Thin them gradually once they are large enough to handle, using the spacing recommended for your variety.
For better results:
- Use loose soil without large rocks or hard clumps.
- Choose a container deep enough for the carrot variety.
- Keep the top layer of soil consistently moist during germination.
- Thin crowded seedlings instead of allowing them to compete.
- Avoid applying excessive nitrogen, which can encourage leafy tops instead of strong roots.
Thinning may feel tedious, but it gives the remaining carrots room to develop.
Beets
I previously grew Early Wonder Tall Top beets, but I harvested them too soon. This season, I plan to grow Detroit Supreme and practice more patience.
Both parts of the beet are edible. The roots can be roasted, boiled, pickled, or added to meals, while the greens can be cooked like other leafy vegetables or added to soup.
Each wrinkled beet “seed” is actually a cluster that may produce more than one seedling. Be prepared to thin them after germination. You can use the removed baby greens instead of throwing them away.
Radishes and turnips
Radishes and turnips are good additions to a Fall garden because many varieties mature relatively quickly. Direct sow them in their permanent growing space and keep the soil consistently moist.
Irregular watering can affect root development and may make radishes overly pungent or woody. For a steadier supply, plant a small row or section every one to two weeks rather than sowing every seed at once.
Always check the seed packet for spacing and days to maturity. Selecting faster-growing varieties can help you fit multiple rounds of root vegetables into your cool-season garden.
Onions and Bunching Onions
September is also a good time to begin onions for the cool-season garden. I am growing Texas Early Grano onions along with bunching onions.
Texas Early Grano is a short-day onion, which makes it suitable for many southern gardens. Short-day onions begin forming bulbs when daylight reaches approximately 10 to 12 hours, so choosing the right day-length type for your location is important.
Onions grow more slowly than many leafy greens. Their seeds may take longer to germinate, and the seedlings can remain thin for several weeks. Do not assume they have failed simply because nothing happened within the first few days.
For better germination and early growth:
- Keep the growing medium consistently moist but not waterlogged.
- Be patient while waiting for seedlings to emerge.
- Place seedlings under a grow light as soon as they germinate.
- Provide gentle airflow to strengthen the thin leaves.
- Trim the tops only if they become excessively long and begin falling over.
- Harden the seedlings off before moving them outdoors.
My onions will remain indoors while they develop and will be transplanted after temperatures become cooler.
Bunching onions do not produce the same large bulbs as traditional onions. They are grown for their slender white stems and green tops, which can be harvested for soups, salads, sauces, and everyday cooking.
Cool-Season Herbs for September
September is a good time to refresh the herb garden with plants that appreciate cooler weather. The herbs I am considering this season include:
- Cilantro
- Parsley
- Chives
- Oregano
Cilantro struggles in summer heat and bolts quickly, so cooler Fall temperatures provide a better growing window. Parsley takes patience because its seeds can be slow to germinate, but established plants can provide repeated harvests.
Chives have not been a regular part of my garden, mainly because I was unsure how I would use them. They can be added to eggs, potatoes, soups, salads, sauces, and even an herb pesto.
I already have oregano growing, so I do not need to start another plant from seed. Instead, I can cut back the established plant to encourage fresh growth.
If you garden in a small space, grow herbs in individual pots, a vertical planter, or an herb tower. Choose herbs you regularly use so every harvest has a purpose in your kitchen.
September Seedling and Garden-Care Tips
September is a transition month, so you may be caring for indoor seedlings, harvesting summer vegetables, and preparing containers for Fall at the same time. Use this checklist to keep the process manageable.
Indoor seedling care
- Keep seed-starting mix consistently moist during germination.
- Check small cells and cups frequently because they dry out quickly.
- Lift containers to judge their weight and touch the soil before watering.
- Position grow lights close enough to prevent stretching without overheating the leaves.
- Use gentle airflow to help seedlings develop stronger stems.
- Begin hardening seedlings off gradually before transplanting them outdoors.
Preparing the outdoor garden
- Remove summer plants that are diseased, severely infested, or no longer productive.
- Allow healthy warm-season crops to continue producing if they are not occupying urgently needed Fall space.
- Remove old roots and debris before reusing a container.
- Refresh used potting mix with compost and any appropriate amendments.
- Water newly prepared containers before planting.
- Add mulch after transplanting to help regulate moisture and soil temperature.
Young brassicas are highly attractive to caterpillars and other pests. Protect them early with insect netting or row cover rather than waiting until damage appears.
Taking care of these smaller tasks throughout September can make the move from your summer garden into your Fall garden feel less overwhelming.
Plan Your Next Planting with A Planting Guide
Knowing what to plant in September is helpful, but your garden does not stop after this month. As crops are harvested and growing spaces become available, you will need to know what can be planted next. That is where succession planting becomes useful.
Instead of planting everything at once, you can sow smaller rounds of fast-growing crops every one to two weeks. Lettuce, mustard greens, radishes, and bok choy are all good options for this method. Staggering your planting dates can help you avoid receiving one large harvest followed by an empty garden.
If you want help planning beyond this article, my Monthly Planting Guide walks you through your planting options based on your growing zone. You can use it to see:
- What you can start indoors each month
- What you can direct sow in the garden
- Which crops can be planted next
- How to plan successive rounds for continued harvests
- What opportunities are coming as the seasons change
Instead of beginning your research again every month, you can return to one organized guide and focus your energy on growing food.
Whether you are filling a few containers or planning an entire backyard garden, the Monthly Planting Guide can help you move from one planting to the next with less guesswork.
Plan Your Next Planting with a Monthly Planting Guide
Knowing what to plant in September is helpful, but your garden does not stop after this month. As crops are harvested and growing spaces become available, you will need to know what can be planted next. That is where succession planting becomes useful.
Instead of planting everything at once, you can sow smaller rounds of fast-growing crops every one to two weeks. Lettuce, mustard greens, radishes, and bok choy are all good options for this method. Staggering your planting dates can help you avoid receiving one large harvest followed by an empty garden.
If you want help planning beyond this article, my Monthly Planting Guide walks you through your planting options based on your growing zone. You can use it to see:
- What you can start indoors each month
- What you can direct sow in the garden
- Which crops can be planted next
- How to plan successive rounds for continued harvests
- What opportunities are coming as the seasons change
Instead of beginning your research again every month, you can return to one organized guide and focus your energy on growing food.
Whether you are filling a few containers or planning an entire backyard garden, the Monthly Planting Guide can help you move from one planting to the next with less guesswork.
Frequently Asked Questions
Is September too late to start a fall garden in Zone 8?
No. September is still a productive planting month for many cool-season vegetables. However, slow-growing crops such as broccoli, cabbage, and cauliflower may need to be purchased as transplants if they were not started earlier.
Should I start fall seeds indoors or outdoors?
It depends on the crop and your weather. Root vegetables are generally direct sown, while starting leafy greens and brassicas indoors can protect young seedlings from September heat, heavy rain, drying soil, and pests.
What vegetables can I direct sow in September?
Carrots, radishes, turnips, rutabagas, and parsnips are good direct-sow options. Beets can also be direct sown. Keep the upper layer of soil consistently moist while seeds germinate.
Can I grow fall vegetables in containers?
Yes. Leafy greens, root vegetables, onions, and brassicas can all grow in containers. Match the container size to the mature plant and avoid overcrowding large crops such as collards, cabbage, broccoli, and cauliflower.
What if September is still hot in Georgia?
Start heat-sensitive crops indoors and transplant them after temperatures become more comfortable. If you direct sow outdoors, provide consistent moisture and afternoon shade when appropriate.
Do all Zone 8 gardeners follow the same planting dates?
No. A growing zone describes average minimum winter temperatures, but it does not provide exact planting dates. Gardeners should also consider their local weather, first expected frost, and daily soil temperatures when planning.
What are some easier fall crops for beginners?
Kale, mustard greens, Swiss chard, radishes, and bok choy are approachable options when planted under suitable conditions.
