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Zone 8B Vegetable Planting Calendar

When can you plant in Zone 8B? In Zone 8B, outdoor sowing opens with cool-season crops like Lettuce and Spinach in January, and warm-season crops like Tomato follow after the ~March 10 last frost. The season runs about 250 frost-free days, until ~November 15. The calendar below scores all 35 crops month by month.

Scored per crop from your zone's frost dates, each crop's days-to-maturity, and typical soil temperatures — honestly, including when not to plant.

A zone caveat: USDA zones reflect winter lows, not summer heat — this calendar is a zone-level guide. For timing tuned to your ZIP region, sun, and soil, get your free AI garden plan.

Last frost (50/50 date)

~March 10

First frost (50/50 date)

~November 15

A single frost date is a coin flip dressed up as a fact: these are the 50/50 dates, and about half of years see frost past them. Across 4,330 NOAA stations, frost odds typically stay near 1 in 3 for about a week past the date and don't drop below 1 in 10 until roughly 16 days past it — cautious growers wait those two-plus weeks; gamblers plant on the date and keep row cover handy. The free AI plan reads the real percentile dates for your ZIP region and lets you pick your risk.

Zone 8B Month by Month

The same verdicts as the grid, read as a to-do list. Temperatures are the zone-level model this calendar scores against — your bed's soil thermometer overrules them.

1. January soil ~51°F · highs ~51°F · 20 of 35 crops in a good window
   Opens: Lettuce, Spinach, Kale, Swiss Chard, Arugula, and Carrot and 10 more. Start indoors: Tomato, Pepper, Eggplant, Sweet Potato, Thyme, Oregano, Chives, and Parsley. Risky: Garlic (shoulder of the garlic window).
2. February soil ~52°F · highs ~54°F · 20 of 35 crops in a good window
   Start indoors: Lettuce, Kale, Swiss Chard, Broccoli, Cabbage, Cauliflower, Basil, Zucchini, Cucumber, Pumpkin, Okra, Watermelon, and Cantaloupe. Nothing new opens or closes.
3. March soil ~56°F · highs ~62°F · 20 of 35 crops in a good window
   Last good month for: Onion, Potato, and Parsley.
4. April soil ~62°F · highs ~73°F · 24 of 35 crops in a good window
   Opens: Tomato, Basil, Zucchini, Cucumber, Bean, and Corn and 1 more. Last good month for: Lettuce, Spinach, Kale, Swiss Chard, Arugula, and Carrot and 6 more. Risky: Onion and Potato (matures into the early heat); Parsley (last sowing before the window closes).
5. May soil ~67°F · highs ~84°F · 16 of 35 crops in a good window
   Opens: Pepper, Eggplant, Pumpkin, and Sweet Potato. Last good month for: Radish, Rosemary, Thyme, Oregano, and Chives. Risky: Lettuce, Spinach, Arugula, and Cilantro (heat bolting risk); Kale, Swiss Chard, Beet, and Peas (matures into the early heat); Okra, Watermelon, and Cantaloupe (soil still cool (~67°F)).
6. June soil ~71°F · highs ~92°F · 14 of 35 crops in a good window
   Opens: Okra, Watermelon, and Cantaloupe. Risky: Rosemary, Thyme, Oregano, and Chives (transplant shock in the heat — establish before or after summer).
7. July soil ~72°F · highs ~95°F · 14 of 35 crops in a good window
   Last good month for: Corn, Pumpkin, Sweet Potato, Watermelon, and Cantaloupe. Risky: Rosemary, Thyme, Oregano, and Chives (transplant shock in the heat — establish before or after summer).
8. August soil ~71°F · highs ~92°F · 9 of 35 crops in a good window
   Last good month for: Tomato, Pepper, Eggplant, Basil, Zucchini, and Cucumber and 3 more. Risky: Rosemary, Thyme, Oregano, and Chives (transplant shock in the heat — establish before or after summer).
9. September soil ~67°F · highs ~84°F · 13 of 35 crops in a good window
   Opens: Kale, Swiss Chard, Carrot, Radish, Beet, and Broccoli and 7 more. Last good month for: Kale, Swiss Chard, Carrot, Beet, Broccoli, and Cabbage and 2 more. Risky: Lettuce, Spinach, Arugula, and Cilantro and 1 more (heat bolting risk); Onion (finishes just ahead of first frost).
10. October soil ~62°F · highs ~73°F · 7 of 35 crops in a good window
    Opens: Arugula and Garlic. Last good month for: Arugula. Risky: Lettuce, Kale, Swiss Chard, and Carrot and 4 more (finishes just ahead of first frost); Spinach and Cilantro (last sowing before the window closes).
11. November soil ~56°F · highs ~62°F · 6 of 35 crops in a good window
    Last good month for: Radish. Risky: Arugula (finishes just ahead of first frost).
12. December soil ~52°F · highs ~54°F · 5 of 35 crops in a good window
    Last good month for: Garlic. Start indoors: Onion and Rosemary.

When to Start Seeds Indoors vs. Direct Sow in Zone 8B

In Zone 8B, start Onion, Rosemary, Eggplant and other transplants indoors 5–10 weeks before your ~March 10 last frost, then set them out once it passes. Arugula, Bean, Beet and the other direct-sow crops go straight into the bed. Exact indoor start dates for every crop are below.

Planting a fall garden? Count the indoor weeks back from your transplant date instead of the spring frost — the free AI plan's prep runway computes that per plant, including hardening-off days.

How Much Fits in a Zone 8B Season

• 26 of 35 crops have four or more good planting months in Zone 8B.
• Widest windows: Chives (9 months), Oregano (9 months), Rosemary (9 months).
• Tightest windows: Cantaloupe (2), Watermelon (2) — plant these on the first good month, not the last.
• Good months per crop in Zone 8B: Chives 9 · Oregano 9 · Rosemary 9 · Thyme 9 · Radish 8 · Arugula 5 · Basil 5 · Bean 5 · Beet 5 · Broccoli 5 · Cabbage 5 · Carrot 5 · Cauliflower 5 · Cucumber 5 · Kale 5 · Peas 5 · Sunflower 5 · Swiss Chard 5 · Tomato 5 · Zucchini 5 · Cilantro 4 · Corn 4 · Eggplant 4 · Lettuce 4 · Pepper 4 · Spinach 4 · Garlic 3 · Okra 3 · Onion 3 · Parsley 3 · Potato 3 · Pumpkin 3 · Sweet Potato 3 · Cantaloupe 2 · Watermelon 2

Zone 8B Planting FAQ