July is the hottest, most generous month in the Zone 9 garden, and the month that demands the most water. Tomatoes, peppers, beans and squash are in full production, and the fall garden needs starting now, while summer is at its peak. Gardeners who sow fall brassicas in July harvest into November; those who wait until September often run out of season.
What July means in Zone 9
USDA Zone 9 covers the warmest parts of the southern United States, including much of Florida, southern Texas, southern Louisiana, southern Arizona and coastal California. Winters are mild, with average winter lows of 20 to 30°F, frost is brief and light, and the growing season runs nearly all year.
The dates that matter most are the frost averages. The average last spring frost in Zone 9 is Jan 30–Feb 15, and the average first autumn frost is Dec 1–15. These are USDA zone averages drawn from NOAA frost records, not exact dates for any one garden. Always check your local extension service and the forecast before planting tender crops outside. Use our frost date calculator for your zone’s averages.
July in Zone 9 is the hottest month, and the garden runs on water and mulch. Fall tomatoes transplanted this month will fruit in autumn, and fall brassicas started indoors now will be ready in August. Shade heat-sensitive crops in the afternoon and water at the base, never over the leaves.
July task list
- Harvest tomatoes, peppers, cucumbers, zucchini, beans, corn and okra daily.
- Start fall brassicas indoors: broccoli, cabbage, kale, cauliflower and collards.
- Sow fall carrots, beets and beans, and succession-sow squash.
- Water deeply in the morning, and mulch beds thickly.
- Transplant fall brassica seedlings started in June.
- Feed tomatoes and peppers, and side-dress corn.
- Plan the fall garden and order garlic for autumn planting.
What to start indoors in July
Start these under cover now, with strong light and steady moisture.
- Broccoli — matures in 60–85 days; frost-tolerant; soil pH 6.0–7.0.
- Cabbage — matures in 60–90 days; frost-tolerant; soil pH 6.0–7.0.
- Kale — matures in 50–65 days; hardy; soil pH 6.0–7.5.
- Collard greens — matures in 60–80 days; frost-tolerant; soil pH 6.0–7.5.
What to direct-sow in July
Sow these straight into prepared beds and water the seed row well.
- Green beans — matures in 50–65 days; tender; soil pH 6.0–7.0.
- Okra — matures in 50–65 days; tender; soil pH 6.0–6.8.
- Zucchini — matures in 45–55 days; tender; soil pH 6.0–7.5.
What to transplant in July
Harden seedlings off for a week before planting out, and water them in well.
- Tomatoes — matures in 60–85 days; tender; soil pH 6.0–6.8.
- Bell peppers — matures in 60–90 days; tender; soil pH 6.0–6.8.
- Broccoli — matures in 60–85 days; frost-tolerant; soil pH 6.0–7.0.
What to harvest in July
Pick little and often: regular picking keeps beans, squash and cucumbers producing.
- Tomatoes — tender, matures in 60–85 days.
- Bell peppers — tender, matures in 60–90 days.
- Eggplant — tender, matures in 70–85 days.
- Okra — tender, matures in 50–65 days.
- Sweet potatoes — tender, matures in 90–120 days.
- Sweet corn — tender, matures in 60–90 days.
- Cucumbers — tender, matures in 50–70 days.
July planting at a glance
| Crop | What to do | Days to maturity | Cold tolerance | Spacing |
|---|---|---|---|---|
| Broccoli | Start indoors | 60–85 | frost-tolerant | 18–24 in |
| Cabbage | Start indoors | 60–90 | frost-tolerant | 12–24 in |
| Kale | Start indoors | 50–65 | hardy | 12–18 in |
| Collard greens | Start indoors | 60–80 | frost-tolerant | 12–18 in |
| Green beans | Direct sow | 50–65 | tender | 4–6 in |
All figures are broad published ranges from standard horticultural references, and they vary by variety, soil and weather. Check your local extension service for advice on your own garden.
Soil, water and feeding in July
July soil is warm and thirsty. Water at the base of plants in the early morning so leaves dry before the heat, and mulch with straw or shredded leaves to keep roots cool. Feed tomatoes and peppers every few weeks, and give corn a side-dressing of compost when it is knee-high. In containers, water daily, sometimes twice in a heatwave.
Frost and weather protection
Frost is a long way off in July: the average first autumn frost in Zone 9 is Dec 1–15, but July has its own weather problem: heat. High temperatures stop tomatoes setting fruit and make lettuce bolt, so water deeply, mulch thickly and shade heat-sensitive crops in the afternoon. Keep an eye on the forecast for storms, and stake tall plants before wind hits them. Frost protection gear can stay in the shed this month.
Pests and problems to watch
July pests are at their worst: squash bugs, cucumber beetles, tomato hornworms and aphids. Inspect plants every few days, hand-pick hornworms and beetles, and strip squash bug eggs from leaf undersides. Powdery mildew spreads in hot, humid weather: improve airflow and avoid wetting leaves.
Frequently asked questions
What can I plant in July in Zone 9?
Fall crops: start broccoli, cabbage, kale, cauliflower and collards indoors, and sow fall carrots, beets and beans outdoors. It is late for tomatoes and peppers: those needed starting months ago.
Why are my tomatoes not setting fruit in July?
Heat is the usual cause: tomato flowers drop when daytime temperatures stay very high. Keep plants watered and mulched, and fruit set usually resumes when nights cool.
How much should I water in July in Zone 9?
Deeply, at soil level, in the early morning, usually every few days in beds and daily in pots. Mulch thickly to slow evaporation.
When should I start the fall garden in Zone 9?
Now. Start fall brassicas indoors in July and transplant them in August, counting back from your average first frost, Dec 1–15.
For the full year, browse the planting calendar hub. Nearby months: June in Zone 9, August in Zone 9, July in Zone 7. Use the watering calculator to work out exact dates for your own garden.