Nicole's Quick Take: Every September I pull anything that's diseased, spent, or won't mature before frost, and I leave anything still producing or built to handle cold. But the exact list changes by climate. What I rip out in Nashville isn't what a Chicago or Houston gardener should pull this month.

September Garden Cleanup: What to Remove by Climate Zone

I get a version of this question every September: "What should I pull, and what should I keep?"

The answer depends entirely on where you garden.

Climate types:

1. Cold climate (Chicago, Minneapolis, Denver)
2. Mild climate (Nashville, Atlanta, Charlotte)
3. Hot climate (Houston, Phoenix, Orlando)

Continue reading for your climate-specific September plan.

Mild Climate: Nashville, Atlanta, Richmond, Charlotte, Louisville, and Oklahoma City

This is my home base, and it's a genuinely fun place to garden in September.

There's a real "second garden season" that runs from late summer into November here, and that matches my own experience exactly.

What to Rip Out

• Bolted spring lettuce and spinach. Anything that's gone to seed and turned bitter can come out to make room for a fresh fall sowing.
• Squash and cucumber vines with heavy powdery mildew. Our humidity makes this a near-annual event by September, and once production stops, there's no reason to keep the vine.
• Tomato plants that are clearly finished, meaning disease has taken over, and fruit set has stopped. If they're just slowing down, though, keep reading.

What to Leave

• Tomatoes, peppers, and eggplant that are still producing. In a mild climate, these often keep going well into September and even October. Don't pull a plant just because it's September on the calendar; pull it because it's actually done.
• Basil and other tender herbs. Keep harvesting right up until frost is genuinely forecast.
• Newly seeded fall crops. University of Tennessee Extension recommends seeding lettuce, mustard, and Swiss chard by mid to late September for a strong fall harvest, so if you've just planted these, leave them be and let them establish.
• Herbaceous perennials you want to divide. September is actually a good time to divide overgrown perennials in a mild climate, not a time to remove them.

Cold Climate: Chicago, Minneapolis, Denver, Boston, Milwaukee, and Burlington

If you're gardening somewhere with an early first frost, usually mid-September through early October, September is your last real cleanup window before the cold sets in for good.

What to Rip Out

• Tomato plants that are declining from disease. If blight or wilt has taken over, pull the whole plant. According to University of Maryland Extension, if tomato plants are rapidly declining due to disease, you can pick the remaining fruit and ripen it indoors rather than leaving a sick plant in the ground.
• Warm-season crops that won't finish in time. Green beans, peppers, and other frost-tender vegetables need to mature before a killing frost, per University of Tennessee Extension guidance. If the math doesn't work out for your first frost date, pull them now and free up the space.
• Spent squash and cucumber vines. Once powdery mildew has taken hold and production has stopped, these are done for the season.
• Diseased plant debris. University of Connecticut Extension recommends removing dead or diseased plant material to the trash rather than the compost pile, since many diseases overwinter on old leaves and stems.
• Tender bulbs, after frost. Cannas, dahlias, and gladiolus should be lifted and stored once frost has hit, according to Iowa State University Extension.

What to Leave

• Cold-hardy greens. Kale, collards, and other cool-season crops can withstand a real frost, and their harvest window often continues for weeks afterward.
• Broccoli, brussels sprouts, and root vegetables. Carrots, beets, and brassicas actually sweeten after a light frost touches them, so there's no rush to pull these.
• Perennial herbs and dormant perennials. Hold off on major pruning of perennials until late spring. Beneficial insects use old plant stems as winter habitat, so a little bit of visual mess right now is doing real ecological work.
• Raspberry and blackberry canes, except for the ones that already fruited this summer. Those can be pruned out; the rest stay.

Hot Climate: Houston, Phoenix, Orlando, Austin, New Orleans, and San Antonio

If you're gardening somewhere hot, September can still feel like the middle of summer, and your fall garden is really just getting started. Gardeners in this climate are sometimes still riding out 100-degree days this month, even as they prep for fall planting.

What to Rip Out

• Squash and cucumber vines that gave out to squash vine borers, powdery mildew, or spider mites — the usual culprits for yellow squash, zucchini, and pickling cucumbers by this point in the heat.
• Tomato plants, especially slicing varieties like Better Boy or Celebrity, that stopped setting fruit once nighttime temperatures stayed above 75 degrees and show no sign of recovering. Texas A&M AgriLife horticulture specialists note that when moisture and fruit set both fail during extreme heat, it's sometimes best to pull the plant and wait for cooler, more favorable conditions rather than nursing it along.
• Spent bush bean and pole bean plantings from spring, along with sweet corn stalks that have already been harvested and are browning and drying out at the base.
• Cantaloupe and watermelon vines that finished fruiting weeks ago and are visibly dying back, leaving brittle, yellowing vines behind.

What to Leave

• Okra. It keeps producing right through the last of the heat and often all the way into October. Keep harvesting pods every couple of days so the plant keeps setting new ones.
• Hot peppers, including jalapeño, habanero, serrano, and banana peppers. These plants are often just hitting their stride now that they've had a full summer to establish.
• Eggplant, especially Asian and Japanese varieties, which tend to handle extended heat better than the classic Italian types and are usually still setting fruit steadily.
• Southern peas, like black-eyed peas and purple hull peas. These heat-loving legumes are often still filling out pods and shouldn't be pulled early.
• Sweet potatoes. The vines can look a little wild this time of year, but the roots are still bulking up underground. Leave them in place until closer to your first frost date.
• Malabar spinach. Where cool-season greens struggle, this vining green thrives in exactly the conditions a hot-climate September brings.
• Yardlong beans (asparagus beans). A heat-tolerant stand-in for green beans that keeps producing long after regular bush beans would have given up.

The Tool Set That Makes September Cleanup So Much Easier

No matter which climate you're gardening in, this month always comes down to the same basic motion: cut, pull, sort, repeat, across every bed in your garden.

This is exactly the kind of work Gardenary's Tool Set was built for. It includes a bypass pruner for clean cuts on spent stems, a weed knife for getting tough roots out without disturbing what's growing next to them, and a trowel for digging to help remove and plant new fall crops.

Having everything I need in one set means I can easily knock out my September garden cleanup in an afternoon.

Where Gardeners Get September Cleanup Wrong

• Ripping out a plant just because it's September. The calendar isn't the deciding factor. Whether a plant is still producing or has genuinely finished is what matters, and that answer looks completely different in Houston than it does in Chicago.
• Composting diseased plant material. Diseased leaves and stems belong in the trash, not the compost pile, or you'll reintroduce the same problem next season.
• Over-pruning perennials in a cold climate. It's tempting to tidy everything up, but leaving old stems in place through winter gives beneficial insects a place to overwinter.
• Giving up on a hot-climate garden too early. If you're in Houston or Phoenix and your tomatoes look tired, that doesn't mean your garden is over. It usually means you're a few weeks away from your actual fall season.

Keep Going, Wherever You're Gardening

September asks something different of every climate, and that's part of what I love about it.

Whether you're clearing space for kale in Minneapolis, letting your tomatoes ride out a few more warm weeks in Nashville, or waiting on real relief from the heat in Houston, the goal is the same: set your garden up to keep feeding you for as long as your climate will allow.