Mid-late August Garden To-Do List
An Italian restauranteur on Instagram recently popped in my algo to inform me that Americans do August all wrong. While we're buying school supplies, signing up for fall sports, and mentally checking summer off the list — Italians are taking the entire month at the beach. Just saying “arrivederci” to normal life and fully committing to the best part of summer.
So cruel! So true! After weeding for hours in this heat, literally nothing sounds better than a beach vacation.
But the thing about having a garden, is that in August you don't really get to fully check out. The tomatoes don't care that school starts next week. The okra is not interested in your fall goals. August is peak harvest season, and if you step away from it entirely, you'll come home to a jungle and a compost pile full of missed opportunities.
So maybe the real question is: can you do both? Can you soak up the last golden weeks of summer and start laying the groundwork for fall?
In the garden, at least, the answer is yes. Here's what August actually looks like out there right now.
Watering
It is hot. Like, really hot. And this is exactly the time of year when irrigation systems that have been running before you get out of bed start to fail without you knowing it. We've been getting calls from clients this week about irrigation issues — and the problems are all different. A clogged emitter here, a broken head there, a zone that stopped firing for no obvious reason. Irrigation systems need ongoing upkeep, and the best way to catch problems early is to actually watch yours run.
Do a manual cycle this week while you're outside and can see what's happening. Walk the beds. Look for dry spots, puddles, or anything that doesn't look right. Five minutes of observation now can save a plant (or a whole bed) from a week of invisible drought stress.
And if you're hand-watering potted plants — they need more attention than you think right now. Containers dry out fast in this heat, sometimes within a day. Check them daily and water deeply until it drains out the bottom.
Harvest
This is it. This is the Italian summer moment right here in your own backyard. August is peak harvest season in Middle Tennessee, and the garden is asking you to slow down and actually enjoy it. Put "harvest and eat from the garden" on the calendar a couple of nights a week — not as a chore, but as the point of the whole thing. If you need inspiration for what to do with everything coming in, our cooking blogs are a great place to start. And don't miss Sarah's Recipe Roundup for some outside-the-box ideas when you've made all the pickles and zucchini bread you can handle.
Tomatoes, peppers, cucumbers, beans, okra, eggplant, melons, summer squash, zucchini — harvest often to keep plants producing.
Pick herbs and flowers regularly to encourage fresh growth.
Morning is best for greens and herbs; mid-morning or late afternoon for fruits and veggies.
Onions are ready when tops flop over. If they're small, harvest and eat right away — they won't store well.
While you're out there harvesting, take stock of what's slowing down. Cucumbers and zucchini that are producing less and looking ragged are good candidates for removal — clearing that space now gives you a head start on fall planting.
Plant
We're in that in-between window in August where it's too late for most new summer crops but not quite time for fall planting either. Now is actually a great time to start seeds indoors for quick greens like lettuce, kale, and mustard greens, plus some cool season flowers — they'll be ready to transplant out into the garden in mid-September when temperatures start to ease up.
For the bigger fall crops — broccoli, cauliflower, Brussels sprouts — if you haven't started seeds already, that window has passed. Plan to purchase transplants when they start showing up in garden centers in early September. We're diving into exactly what to plant this fall — and when — in our Q&A feature in this issue. That's your next read.
Support & Prune
We know. The garden is a lot right now. But this is one of those tasks that seems daunting until you're actually out there doing it — and then it feels so good when it's done. Make some space. Let the plants breathe. Give yourself room to actually find the harvest.
Keep weaving or tying tomatoes; stake peppers and eggplants. The jungle is real in August and staying on top of it now means you'll actually be able to get to your tomatoes through October.
Tall flowers like zinnias or dahlias may need extra support after rain — check ties and stakes after any big storm.
Get ruthless about what's no longer pulling its weight. If a summer plant is struggling and not producing, cut your losses and remove it entirely to make room for fall crops. Cut the stem at soil level and leave the roots to decompose underground — unless the plant had disease, in which case pull the whole thing, roots and all, and dispose of it in the trash rather than the compost.
Keep pruning yellow or brown leaves off tomato plants. Cherry tomatoes in Middle Tennessee will likely keep producing for another couple of months — so it's worth investing the time to keep them manageable now.
Feed
If you're noticing purple leaves or a slowdown in production, your plants may be running low on nutrients and need a quick boost. A liquid fertilizer like Neptune's Harvest fish fertilizer is absorbed faster than granular options — mix and water it in and your plants can get what they need right away.
Fertilize long-season crops (tomatoes, peppers, eggplants, melons) monthly with a balanced organic fertilizer like TomatoTone or GardenTone .
Add 1-2 inches of compost to your beds before planting fall crops — now is a good time to get it into any beds you're clearing out and prepping for September.
Pests & Diseases
Stay strong out there. August pest pressure is real and it's not letting up anytime soon.
The usual suspects are still very much present — hornworms, squash vine borers, cucumber beetles, squash bugs, flea beetles, and aphids. Hand-pick what you can, knock aphids off with a strong spray of water, and keep your soapy water jar handy for the rest.
Two more to watch for this month: leaf-footed bugs and harlequin bugs. Both are showing up in Middle Tennessee gardens right now and both can do real damage if left unchecked. Hand-pick and drop in soapy water — same drill as the others.
And if you missed our June Bug Bingo card last issue, it's a fun way to keep track of who's showing up out there — good guys included. Because not everything crawling around your garden is the enemy. Ladybugs, assassin bugs, parasitic wasps, and fireflies are all still working hard on your behalf.
On disease: if your plants are showing signs of bacterial, fungal, or viral disease right now, the honest truth is there's not much you can do to reverse it at this point in the season. Remove damaged leaves, keep things as clean as possible, and focus on extending the harvest as long as you can. Then make a note for next year: look for disease-resistant varieties, and — we'll say it again — don't let it become a jungle. Good airflow is your best disease prevention tool.
And if you're ready to have a little more help keeping things in check next season, we're opening our 2027 Garden Care waitlist. Email me to get on it early, spots go fast.
Planning & Shopping
Fall veggie starts are starting to appear in garden centers. Planting now is a gamble — the heat is still real and young transplants will need babying, including watering multiple times a day until temperatures ease up. If you're adventurous and up for the challenge, go for it. If you'd rather wait for more forgiving conditions, early September is your safer bet.
Garlic and fall-planted bulbs are worth ordering now before the best varieties sell out — this is one of those tasks that's easy to put off and then suddenly it's October and the good stuff is gone.
Making your fall shopping list? Our fall planting Q&A in this issue has everything you need to know about what to grow and when to get it in the ground. Start there.
