What to Plant in October in Zone 8a

September 25, 2026

Zone 8a’s October Planting Window

Zone 8a covers a minimum winter temperature range of 10°F to 15°F, and its growing season stretches later into fall than most of the country gets. October is the transition month: soil temperatures are still warm enough at the surface for quick germination, but nights are cooling fast enough that timing now determines whether a crop matures before frost or gets caught by it.

Average first frost across zone 8a falls between November 15 and November 30, depending on elevation and proximity to open water. That gives most October plantings 45 to 60 days of frost-free growing time before the season’s first hard freeze. Soil temperature at a 4-inch depth is typically running 60°F to 68°F through early October, dropping into the mid-50s by month’s end. That range still supports germination for the cool-season crops below, but it rules out anything that needs warm soil to establish.

Zone 8a Fall Garden Priorities

Two tasks matter more than any other in an 8a October garden: getting leafy greens in the ground while soil is still warm enough for fast germination, and planting garlic and bulbs on schedule for next year’s harvest. Skip the first and you get a slower, patchier stand. Skip the second and you lose an entire crop cycle, since garlic planted late rarely bulbs properly the following summer.

If you want the full zone-by-zone version of this calendar, including spring and summer windows, the book has it laid out month by month rather than as a once-a-year blog post.

Leafy Greens to Sow Now

October is a strong window for direct-seeding cool-season greens in zone 8a.

• Spinach germinates reliably at soil temperatures between 45°F and 75°F, which puts it squarely in range through the whole month. Sow it thick; thin to 3 inches once true leaves appear.
• Kale and collards handle the transition into frost better than almost anything else on this list. A light frost in November actually improves their flavor by converting starches to sugars.
• Lettuce prefers the cooler end of the month. If you’re still seeing highs above 85°F in early October, hold lettuce for two to three weeks and use shade cloth on anything already up.
• Arugula and mustard greens both finish in 30 to 40 days, so an early-October sowing gives you a full harvest before the average first frost.

Garlic and Bulbs for Next Year’s Harvest

Zone 8a is on the mild end of garlic’s chilling requirement, which makes variety selection the deciding factor. Softneck varieties like Inchelium Red and Silverskin need less cold exposure to bulb properly and are the safer default here. Hardneck types can struggle without a longer, colder dormancy period.

Plant garlic cloves 2 inches deep and 6 inches apart, pointed end up, four to six weeks before your expected ground-freeze date. For most of zone 8a, that means planting between mid-October and early November. Mulch with straw once soil temperatures drop below 60°F to insulate root development through winter.

Spring-flowering bulbs (tulips, daffodils, hyacinths) go in the ground this month too. Tulips need a pre-chilling period if your winters don’t reliably hit 40°F for six weeks; refrigerate bulbs for four to six weeks before an early-December planting if that’s a concern in your specific microclimate.

Radicchio and Other Overwintering Transplants

Radicchio is one of the few crops worth transplanting rather than direct-seeding this late in the season, since a head start on root development matters more than germination speed once nights cool down. Set transplants out in the first half of October so they have four to five weeks to establish before growth slows. Space plants 10 to 12 inches apart, and expect the classic red-and-white heads to form as temperatures drop, since radicchio’s color development is triggered by cold rather than day length.

For starting your own, Mirabella Castelfranco Radicchio (Cichorium intybus ‘Mirabella Castelfranco’) Live Plant – Mild Italian Chicory Fall Ship (August-October): 4 Plants in 2.5” Pots — $16.00 is a reliable choice for the Tardivo type that heads up well in zone 8a’s mild winter.

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Cover Crops for Beds You’re Not Replanting

Any bed you’re not putting a fall crop into should go under a cover crop rather than sitting bare through winter. Crimson clover and winter rye both establish fast in warm October soil and hold nitrogen and structure through the cold months. Sow crimson clover at 15 to 20 seeds per square foot, and winter rye at roughly half that density, since rye’s larger seed germinates more reliably per seed planted.

For a fuller crop-by-crop cover breakdown, including which mixes work best in warmer zones like 8a, see the cover crop guide.

Putting the Month Together

October in zone 8a rewards working in order: greens first while soil is still warm, and garlic and bulbs on their own fixed schedule regardless of weather. Cover crops come last, once you know which beds are actually staying empty through winter. The zone 8a planting schedule stays updated with the full week-by-week version of this calendar year-round.

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