April is the busiest planting month in Zone 8. The average last frost is Mar 1–15, so the garden opens up: tender crops move outside, beans and corn go in, and the first spring sowings start to come good. April rewards gardeners who prepared in winter, and punishes anyone who plants tender crops a week too early.
What April means in Zone 8
USDA Zone 8 runs through the southern United States, from parts of Texas, Louisiana, Georgia and South Carolina to the Pacific Northwest coast and parts of California. Winters are mild, with average winter lows of 10 to 20°F, and the growing season is long, which gives Zone 8 gardeners one of the most forgiving calendars in the country.
The dates that matter most are the frost averages. The average last spring frost in Zone 8 is Mar 1–15, and the average first autumn frost is Nov 15–Dec 1. 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.
April in Zone 8 is full-steam-ahead: the frost risk is over, the soil is warm, and warm-season crops can go in without protection. Sweet potato slips started now will have the whole summer to size up, and beans sown every two weeks will keep you in harvest until autumn.
April task list
- Transplant tomatoes, peppers, eggplant and basil after the last frost.
- Sow beans, corn, squash, cucumbers and okra outdoors.
- Start sweet potato slips and okra indoors if you have not already.
- Succession-sow lettuce, radishes and carrots every two weeks.
- Feed tomatoes and brassicas, and mulch beds to hold moisture.
- Plant out herbs: basil, dill, cilantro and parsley.
- Keep fleece handy for late frosts and harden off all transplants.
What to start indoors in April
Start these under cover now, with strong light and steady moisture.
- Okra — matures in 50–65 days; tender; soil pH 6.0–6.8.
- Sweet potatoes — matures in 90–120 days; tender; soil pH 5.5–6.5.
- Rosemary — matures in 90–120 days; tender; soil pH 6.0–7.0.
What to direct-sow in April
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.
- Sweet corn — matures in 60–90 days; tender; soil pH 6.0–6.8.
- Zucchini — matures in 45–55 days; tender; soil pH 6.0–7.5.
- Cucumbers — matures in 50–70 days; tender; soil pH 6.0–7.0.
- Okra — matures in 50–65 days; tender; soil pH 6.0–6.8.
What to transplant in April
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.
- Eggplant — matures in 70–85 days; tender; soil pH 6.0–6.8.
- Basil — matures in 60–70 days; tender; soil pH 6.0–7.5.
- Sweet potatoes — matures in 90–120 days; tender; soil pH 5.5–6.5.
What to harvest in April
Pick little and often: regular picking keeps beans, squash and cucumbers producing.
- Peas — hardy, matures in 60–70 days.
- Lettuce — hardy, matures in 45–60 days.
- Spinach — hardy, matures in 40–50 days.
- Radishes — hardy, matures in 25–40 days.
- Carrots — hardy, matures in 60–80 days.
- Asparagus — hardy, matures in 730–1095 days.
April planting at a glance
| Crop | What to do | Days to maturity | Cold tolerance | Spacing |
|---|---|---|---|---|
| Okra | Start indoors | 50–65 | tender | 12–18 in |
| Sweet potatoes | Start indoors | 90–120 | tender | 12–18 in |
| Rosemary | Start indoors | 90–120 | tender | 24–36 in |
| Green beans | Direct sow | 50–65 | tender | 4–6 in |
| Sweet corn | Direct sow | 60–90 | tender | 12–15 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 April
April is when feeding starts in earnest. Tomatoes, peppers and brassicas are heavy feeders, so side-dress with compost or a balanced fertiliser once they are established. Mulch bare soil with straw or shredded leaves to keep moisture in and weeds down. Water deeply and less often: shallow daily watering makes shallow roots.
Frost and weather protection
April frost is still possible in Zone 8, even though the average last spring frost is Mar 1–15. Averages hide the spread: some years the last frost comes weeks earlier, some years weeks later. Plant tender crops after the average date, harden them off first, and keep fleece within reach until night temperatures are reliably warm. Check your local extension service and the forecast, not just the calendar.
Pests and problems to watch
April pests arrive fast: aphids on new shoots, flea beetles on brassicas, and cutworms on young transplants. Use collars around transplants, hand-pick pests, and encourage ladybirds. Net brassicas against cabbage white butterflies before they lay eggs.
Frequently asked questions
Is it safe to plant tomatoes outside in April in Zone 8?
Yes, after the average last frost, Mar 1–15, once nights stay warm. Harden plants off for a week, plant them deep, and keep fleece ready for a surprise cold night.
What vegetables can I sow in April in Zone 8?
Beans, corn, squash, cucumbers, okra, melons, lettuce, radishes and carrots. April is the main sowing month for warm-season crops.
How often should I water new transplants in April?
Water deeply at planting, then water when the top inch of soil is dry. Deep, less frequent watering builds stronger roots than a daily sprinkle.
When should I start sweet potatoes in Zone 8?
Start slips indoors in April, or buy them, and plant them out once the soil is warm and all frost danger has passed, usually late April or May in Zone 8.
For the full year, browse the planting calendar hub. Nearby months: March in Zone 8, May in Zone 8, April in Zone 9. Use the seed spacing calculator to work out exact dates for your own garden.