August is often one of the toughest months in the garden. The excitement of spring has long passed, summer crops are producing heavily, weeds seem to grow overnight, and the heat can leave both gardeners and plants exhausted.
But don’t let the late-summer slump fool you.
August is one of the most important months for setting up both your fall harvest and next year’s success. While you’re harvesting tomatoes, peppers, cucumbers, beans, and herbs, it’s also time to sow cool-season vegetables, improve your soil, and prepare for changing weather.
Here in my Maryland Zone 7 garden, August is a month of harvesting in the morning, watering wisely, and getting excited about growing vegetables all over again.
Here’s what I recommend doing in your garden this month.
1. Harvest Summer Crops Frequently
Many vegetables produce better when harvested regularly. Leaving mature fruits on the plant often signals that its job is finished.
Continue harvesting:
- Tomatoes
- Peppers
- Cucumbers
- Beans
- Okra
- Eggplants
- Summer squash
- Herbs
Regular harvesting encourages many plants to keep flowering and producing for weeks longer.
If you’re overwhelmed with harvests, now is also a great time to freeze, dehydrate, pickle, or share extras.
Read more:
2. Keep Watering Deeply
August heat can dry soil surprisingly fast.
Instead of watering lightly every day, water deeply so moisture reaches the root zone.
Some helpful practices include:
- Water early in the morning.
- Water the soil—not the leaves.
- Check containers daily.
- Self-watering planters may still need reservoir refills more frequently.
- Adjust watering after heavy rains.
Deep watering encourages stronger root systems and more resilient plants.
Read more: How I Keep My Vegetable Garden Alive During Summer Heat
3. Refresh Your Mulch
Mulch gradually breaks down during the season.
If your mulch has become thin, replenish it around vegetables.
Benefits include:
- Conserves moisture
- Keeps roots cooler
- Reduces weeds
- Prevents soil from splashing onto leaves
- Improves soil as it decomposes
A fresh layer can make a noticeable difference during August heat.
4. Start Planting Fall Crops
One of the biggest mistakes gardeners make is assuming planting season is over.
In Zone 7, August is actually the beginning of fall gardening.
Depending on your first frost date, many crops can still mature beautifully.
Consider planting:
- Bok choy
- Napa cabbage
- Kale
- Spinach
- Lettuce
- Radishes
- Turnips
- Beets
- Carrots
- Cilantro
- Dill
- Asian greens
I usually begin sowing many leafy greens while my tomatoes are still producing.
Related: What to Plant in August (Zone 7 Guide)
5. Start Seeds Indoors for Fall
If daytime temperatures are still extremely hot, some cool-season vegetables germinate much better indoors.
Good candidates include:
- Broccoli
- Cauliflower
- Cabbage
- Brussels sprouts
Starting them indoors gives them a head start before transplanting outside later.
6. Remove Tired Plants
Some early crops may already be finished.
Remove:
- Diseased plants
- Dead cucumbers
- Finished beans
Cleaning beds creates room for succession planting while reducing places where diseases and pests can linger.
7. Watch for Pests
Warm weather keeps many insect populations active.
Continue monitoring for:
- Tomato hornworms
- Aphids
- Spider mites
- Cabbage worms
- Squash vine borers
- Squash bugs
- Flea beetles
Inspect plants every few days.
Catching problems early is almost always easier than dealing with a major infestation.
8. Continue Feeding Heavy Feeders
Many vegetables are still producing heavily.
Tomatoes, peppers, cucumbers, squash, and eggplants benefit from continued feeding if growth slows.
Use a balanced fertilizer, tomato fertilizer or compost according to your plants’ needs, but avoid excessive nitrogen that encourages leafy growth instead of fruit production.
9. Support Heavy Plants
August harvests can become surprisingly heavy.
Check:
- Vego Tomato cages
- Trellises
- Stakes
- Pepper supports
Tie up leaning stems before storms or strong winds cause damage.
I’ve learned that adding extra support before plants collapse is much easier than trying to rescue them afterward.
Read more: Supporting Tomato Plants: Why It Matters and The Best Methods to Keep Them Healthy
10. Continue Pruning Tomatoes
Indeterminate tomatoes usually benefit from light pruning throughout August.
Remove:
- Yellowing lower leaves
- Diseased foliage
- Leaves touching the soil
- Excess suckers if plants become overcrowded
Improved airflow helps reduce disease pressure.
Avoid removing too much foliage during extreme heat since leaves protect fruit from sunscald.
Read more: When and How to Prune Tomatoes: A Beginner’s Guide to Healthier Plants and Better Harvests
11. Keep Weeds Under Control
Weeds compete with vegetables for:
- Water
- Nutrients
- Sunlight
Even just ten minutes of weeding every few days prevents small problems from becoming overwhelming.
12. Save Seeds from Healthy Plants
August is an excellent month to save seeds.
Good candidates include:
- Beans
- Peas
- Lettuce
- Tomatoes
- Peppers
- Herbs
- Flowers
Choose healthy, disease-free plants to preserve the best genetics for next season.
13. Plan Your Fall Garden Layout
As beds begin opening up, think ahead.
Decide:
- Which beds will grow brassicas
- Where leafy greens will go
- Which containers will hold herbs
- Where garlic will be planted in fall
Planning now makes succession planting much smoother.
14. Prepare Beds for Garlic
Although garlic isn’t planted until fall, August is a good time to begin preparing the area.
Work in:
- Compost
- Organic matter
- Slow-release nutrients if needed
Prepared beds are ready to plant once garlic season arrives.
Read more: How to Grow Garlic
15. Preserve Your Harvest
Late summer often produces more vegetables than we can eat fresh.
Consider:
- Freezing peppers
- Freezing tomatoes
- Dehydrating herbs
- Pickling cucumbers
- Freezing beans
- Drying hot peppers
- Making sauces
Preserving food helps you enjoy your garden long after the growing season ends.
Read more: Freezing vs Dehydrating: Which is Better?
16. Keep a Garden Journal
August is the perfect time to reflect.
Write down:
- Best-performing varieties
- Plants that struggled
- Pest problems
- Harvest amounts
- New ideas for next year
These notes become incredibly valuable when planning next season’s garden.
Final Thoughts
August can feel like a challenging month, but it’s also one of the most rewarding. While you’re enjoying baskets of tomatoes, peppers, cucumbers, and herbs, you’re also planting the next season of fresh harvests.
Every small task you complete this month—whether it’s refreshing mulch, sowing leafy greens, or preserving your harvest—helps extend your gardening season and prepares your garden for the months ahead.
Gardening is always about looking forward. August reminds us that even as summer begins to wind down, another season of growing is just getting started.
August Gardening Checklist (Zone 7)
✔ Harvest vegetables regularly
✔ Water deeply and consistently
✔ Refresh mulch around plants
✔ Plant fall vegetables
✔ Start brassicas indoors if needed
✔ Remove spent crops
✔ Monitor for pests and diseases
✔ Fertilize heavy-feeding vegetables
✔ Add supports to heavy plants
✔ Prune tomatoes lightly
✔ Weed garden beds
✔ Save seeds from healthy plants
✔ Plan your fall garden layout
✔ Prepare beds for garlic planting
✔ Preserve extra harvests
✔ Record notes in your garden journal
Related Articles
- What to Plant in August (Zone 7 Guide)
- How to Keep Vegetable Plants Productive During Extreme Summer Heat
- When to Harvest Tomatoes
- When to Harvest Peppers
- How to Support Tomato Plants
- When and How to Prune Tomatoes
- Growing Garlic: A Complete Guide
- How to Grow Bok Choy
- How to Grow Kale
- How to Grow Spinach
- How to Improve Soil Naturally
- What Is Compost and Why Every Gardener Should Make It?
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