September Gardening in Central Texas: Refresh Your Garden for Fall

The temperatures are FINALLY dropping.

Okay, slowly dropping. And when we start celebrating a Central Texas forecast that says 97° instead of 103°, you know we've been gardening here for too long.

But September brings a shift to the Central Texas garden.

The days are getting a little shorter. The mornings occasionally feel almost pleasant. And the plants that spent July and August simply trying not to die are beginning to notice the change, too.

If you managed to keep your spring and summer vegetable garden alive through the Texas heat, you may start seeing something wonderful happen:

A second flush.

Tomatoes begin flowering again. Peppers start setting fruit. Herbs perk up. Zinnias, celosia and other heat-loving flowers that looked exhausted a few weeks ago suddenly start pushing new growth (we know. Here's a picture of our zinnias, currently).

These poor Zinnias have STRUGGLED. But they have new growth and they've been producing, as if they know cooler weather is on the horizon.

But what if your summer garden is toast?

That's okay, too.

You may be staring at crispy tomato vines, overgrown garden beds and something that looks absolutely nothing like the beautiful garden you imagined back in April.

Your instinct might be to rip everything out and plant the fall garden.

Not quite yet.

September in Central Texas can still bring daytime temperatures well into the 90s, and many of our traditional cool-season fall crops aren't going to appreciate being tossed into hot soil under an even hotter Texas sun.

So, what should you do in your Central Texas garden in September?

Refresh it.

Should You Pull Out Your Summer Vegetable Garden in September?

Before you start ripping everything out, take a walk through your garden.

And I mean a REAL WALK. Not the kind where you glance at everything and decide the entire garden is a disaster (I feel that. I've cursed more often than not this summer about these beds).

Look closely.

Is that tomato plant still green and healthy underneath the crispy leaves? Is it beginning to flower again?

Are your pepper plants still producing?

Has your basil gotten huge and woody but still has healthy new growth?

Are your zinnias, celosia or other summer flowers still blooming?

If a plant is healthy, established and beginning to put on new growth, give it a chance.

Warm-season vegetables like tomatoes and peppers can get a second wind as Central Texas temperatures begin to moderate. An established plant already has something a brand-new transplant doesn't: a mature root system.

Clean it up. Remove dead or diseased foliage. Give it consistent water and a little nutrition if needed, and see what it does.

You may be surprised by how much life is left in your summer garden.

Remove Spent and Diseased Plants

And then there are the plants that are simply DONE.

We don't need to hold a funeral for every cucumber vine.

If a plant is diseased, completely exhausted, heavily damaged by pests or clearly isn't coming back, PULL IT. No guilt. No shame. Pull it. We pulled every cucumber and watermelon last week for THIS exact reason.

Remove old vines, fallen fruit and plant debris. Pull the weeds that somehow managed to thrive while everything else was melting.

If you've had significant disease problems, don't toss those plants into your regular compost pile. Remove them from the garden altogether. Burn them. Dumpster. Wherever they need to be that IS NOT in your compost bin to reoccur on another plant.

Once the old growth is gone, you'll have a much better idea of how much space you actually have for your Central Texas fall vegetable and flower garden.

How to Prepare Central Texas Garden Soil for Fall

We've asked a LOT from our garden soil over the last several months.

It has supported spring growth, flower and vegetable production, triple-digit temperatures, constant watering and whatever bizarre weather Texas decided to throw at us this year.

Before we ask it to grow another entire season of vegetables, herbs and flowers, let's give something back.

September is a great time to:

Add quality compost to your garden beds.

Top off raised beds where soil has settled.

Pull weeds before they go to seed.

Check drip irrigation and repair clogged emitters or leaks.

Replenish mulch that has broken down or disappeared over summer.

Healthy soil is one of the best things you can give your fall garden.

And don't skip the mulch just because cooler weather is eventually coming. Mulch continues to regulate soil temperature, conserve moisture, suppress weeds and protect the soil you've worked so hard to build.

Clean Up the Garden - But Don't Make It TOO Clean

September is also a great time for some garden housekeeping.

Cut back dead growth. Deadhead flowering plants. Harvest herbs before pruning them back. Clear crowded areas and give struggling plants some breathing room.

But don't feel like everything needs to be perfectly tidy.

A garden is an ecosystem, not a living room.

Leave some flowers for pollinators. Allow beneficial insects places to shelter. And if something is healthy and serving a purpose, it doesn't need to disappear simply because we're changing seasons.

The goal isn't to strip your garden bare.

The goal is to make room for what's coming next.

When Should You Plant a Fall Garden in Central Texas?

THIS is the tricky part.

By September, garden centers around Central Texas begin filling up with broccoli, kale, lettuce and other fall vegetables.

That doesn't necessarily mean it's time to plant them.

Our calendar might say September while the thermometer is still screaming AUGUST.

Cool-season vegetables can struggle when daytime temperatures remain in the mid-to-upper 90s, particularly when newly transplanted into hot garden soil.

Instead of planting everything at once, use September to begin planning your fall garden.

Think about vegetables such as:

Broccoli, kale, lettuce, spinach, carrots, radishes and beets.

And don't forget cool-season herbs and flowers like cilantro, parsley, dill, calendula, snapdragons, poppies and sweet peas.

Some fall crops can be started from seed while you're waiting for temperatures to cooperate. Others may be better planted as transplants once conditions become more favorable.

Because Central Texas likes to give us approximately seventeen minutes between surface of the sun and surprise freeze, having a plan matters.

Don't Plant According to the Calendar!!! Watch the Weather.

One of the biggest lessons we teach gardeners at Bijou's Blooms is that successful Central Texas gardening requires paying attention to conditions rather than blindly following a planting calendar.

Our seasons don't always arrive when they're supposed to.

The first week of September one year may look completely different from the first week of September the next.

Watch your daytime temperatures.

Pay attention to nighttime temperatures.

Check your soil.

Look at the extended forecast.

And most importantly:

Don't panic because the garden center has fall vegetables sitting outside.

Seeing broccoli transplants for sale does not automatically mean your garden is ready for broccoli.

You have permission to wait.

What Can You Do in a Central Texas Garden in September?

September doesn't have to be an empty month between summer and fall.

Keep harvesting tomatoes, peppers and herbs if they're producing.

Enjoy the flowers that survived summer.

Start appropriate seeds.

Refresh containers.

Add compost.

Fix irrigation.

Replenish mulch.

Clean your tools.

And take notes about what worked this summer and what absolutely did not. What are you NEVER going to grow again?!?! What thrived??

Where did the afternoon sun hit harder than you expected?

Which plants handled the heat beautifully? For us, it was Mexican Tuberose. I now want an entire farm of it.

Where wasn't your irrigation reaching?

Which variety produced like crazy?

Which one are you never planting again?

Those observations will make you a better gardener next year.

Gardening isn't just about planting.

Sometimes gardening is preparing.

Sometimes it's observing.

And sometimes the very best thing you can do for your garden is not plant something yet.

September Is Our Central Texas Garden Reset

Spring gets all the attention.

It's exciting. Everything is green. Garden centers are overflowing. We have plans and seedlings and entirely unrealistic expectations about how much we're going to accomplish.

September feels different.

By September, the garden has taught us a few things.

We know where the sun really hits in July. We know which plants handled the heat. We know where the irrigation didn't quite reach. We know which variety we're never planting again and which one earned a permanent place in the garden.

So use what you've learned.

Walk through your garden.

Keep what's thriving.

Remove what isn't.

Feed your soil.

Refresh your mulch.

Make your fall garden plan.

And then wait just a little longer for Texas to remember that summer isn't supposed to last forever.

Fall is coming.

For now, we refresh.

Central Texas September Gardening FAQs

Is September too early to plant a fall garden in Central Texas?

It depends on the weather and the crop. September temperatures in Central Texas can remain extremely hot, particularly during the first part of the month. Cool-season transplants can become stressed in excessive heat, so watch current conditions rather than planting solely according to the calendar.

Should I pull out my tomato plants in September?

Not necessarily. Healthy, established tomato plants may begin flowering and producing again as temperatures moderate. Remove plants that are diseased or severely damaged, but healthy tomatoes may be worth cleaning up and keeping for fall production.

What should I do in my Central Texas garden in September?

September is an excellent transition month for removing spent plants, adding compost, replenishing mulch, checking irrigation, pruning healthy summer crops, controlling weeds, starting appropriate seeds and planning your fall vegetable and flower garden.

When should I start preparing my garden for fall in Central Texas?

September is a great time to begin preparing. You don't have to wait until temperatures are cool enough to plant everything. Use the transition period to improve your soil, clean up beds, plan your crops and prepare irrigation so you're ready when favorable planting weather arrives.

What vegetables can I grow in a Central Texas fall garden?

Central Texas fall gardens can include vegetables such as broccoli, kale, lettuce, spinach, carrots, radishes and beets, along with cool-season herbs such as cilantro, dill and parsley. Exact planting times vary by crop and weather conditions.

Need Help Planning Your Central Texas Fall Garden?

At Bijou's Blooms in Liberty Hill, Texas, we help everyday gardeners learn how to grow food, flowers and beautiful spaces in our challenging Central Texas climate.

We offer garden consultations, seasonal garden coaching and hands-on garden classes designed around practical gardening knowledge you can actually use.

And our garden classes come to you - your home, business or wherever you'd like to gather and learn.

Because successful gardening in Central Texas isn't about having a green thumb.

It's about learning how to garden with Central Texas instead of fighting it.