What to plant in October

October is the primary month for planting garlic (zones 5–8), spring-flowering bulbs (zones 5–7, after soil cools below 55°F), and cold-hardy fall greens (kale, mâche, spinach, arugula in zones 6–8). In zones 9–10, October is peak cool-season planting. First frost arrives in zone

October is a month of lasts and beginnings. Last chance to plant spring bulbs in zones 6–8. Last direct sowings of cold-hardy greens before frost. Garlic goes in. And the gardening year, rather than ending, starts its next cycle.

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The most important October task: plant garlic

Per Penn State Extension, garlic is "planted in fall in most of the US because the cloves need cold stratification to develop properly." The optimal timing is 4–6 weeks before the ground freezes: mid-to-late October in zones 6–7, early November in zone 8.

Variety selection:

• Hardneck types (Rocambole, Porcelain, Purple Stripe): Best flavor; better in zones 4–7 where cold winters are reliable. Per Penn State Extension, "hardneck types produce scapes in early summer that are edible and should be cut to encourage larger bulb development."
• Softneck types (Artichoke, Silverskin): Milder, longer storage life; better in zones 7–9 or warmer winter areas.

Planting method: Break heads into individual cloves. Discard the smallest inner cloves (plant the largest outer ones). Plant 2 inches deep, 6 inches apart, in rows 12 inches apart. Apply 2–3 inches of straw or shredded leaf mulch after planting. Per Penn State Extension, mulch "prevents frost heaving of newly planted cloves" and moderates soil temperature during the critical early root-establishment period.

In my zone 7a Long Island beds, garlic goes in mid-October. It sprouts in 3–4 weeks, overwinters as small green plants under mulch, and is harvested in late June–early July of the following year when half the leaves have dried down.

Plant spring-flowering bulbs

October is the main bulb-planting month for zones 6–7 and the secondary window for zones 5 (which started in September) and zones 8 (which can extend into November).

Soil temperature rule: Per Missouri Botanical Garden, "plant tulip and other spring bulbs when soil temperatures are consistently below 55°F." Planting in warm soil leads to premature root and shoot growth that is damaged by freezing. Most of Long Island reaches the 55°F threshold in mid-to-late October.

Tulips: 6–8 inches deep, 4–6 inches apart. In high-deer-pressure landscapes, plant tulip bulbs at the maximum recommended depth (8 inches) — this doesn't prevent deer from eating the flowers, but can discourage squirrel digging. Per Penn State Extension, "chicken wire laid flat over the planting area and held down with stakes discourages squirrel excavation."

I plant tulips in my zone 7a beds knowing the deer will eat many of the flowers. I do it anyway because deer-browsed tulip stems are still better than no tulip flowers, and I protect some with temporary caging through bloom season. 'Darwin Hybrid' tulips are more likely to perennialize (return the second year) than other classes per NC State Extension.

Daffodils: 6–8 inches deep. Deer-resistant. Plant in clusters of 5–10 for best visual effect. Per Missouri Botanical Garden, "daffodils naturalize readily" in well-drained soil and many varieties increase in number over time.

Alliums: 6–8 inches deep, 6 inches apart. Plant after soil cools. Alliums (Allium giganteum, A. 'Purple Sensation', A. schubertii) bridge the bloom gap between late tulips and early summer.

Minor bulbs: Crocus, Scilla, Muscari (grape hyacinth), Eranthis (winter aconite) — all planted 3 inches deep in October for spring bloom. Per Missouri Botanical Garden, "minor bulbs naturalize readily and spread over time, creating self-perpetuating drifts."

Cold-hardy vegetables: extend the season in October

Kale, chard, and collards

Established kale, Swiss chard, and collards continue producing through October in zones 5–7 without protection. Per Penn State Extension, kale "tolerates temperatures to 20°F and is actually sweeter after frost exposure." With a floating row cover, production extends into November or beyond.

Mâche (corn salad)

One of the most cold-hardy salad greens. Per Penn State Extension, "mâche can be direct-sown in early October in zone 6–7 for winter and early spring harvest." Seeds germinate slowly in cold soil — allow 3–4 weeks. The resulting plants grow slowly but persist through winter and provide greens from late October through April.

Spinach

In zone 6–7, spinach direct-sown in early October (or transplanted) will grow slowly through fall and winter, sometimes providing harvest through December with row cover protection. Per Penn State Extension, established spinach "often overwinters and begins rapid growth in early March."

Arugula and Asian greens

Still producing from earlier plantings in October in zones 6–7. New direct sowings are risky — arugula germinates poorly in cold soil below 45°F. If you want October-sown arugula, use row cover to warm the soil.

Zone 8–10 October planting

Zone 8 (Atlanta, Charlotte): October is active cool-season time. Per Clemson HGIC, "October is ideal for planting broccoli transplants, cabbage, collards, and direct-seeding spinach, lettuce, and beets" in zone 8. Transplant all fall brassicas that were started in August.

Zone 9 (Gulf Coast, Sacramento): Per Texas A&M AgriLife Extension, "October is the best month for starting cool-season vegetables in South Texas and the Gulf Coast." Plant tomato transplants for a fall/winter crop. Sow carrots, beets, turnips, and all leafy greens directly.

Zone 10–11 (Miami, Hawaii): Continue cool-season planting. Per UF IFAS Extension, October through February is "prime vegetable growing season" in South Florida.

October ornamental tasks

Tree and shrub planting

October is prime planting time for trees and shrubs. Per Penn State Extension, "fall-planted trees and shrubs have the advantage of root growth without the stress of summer heat." Soil is still warm enough for root establishment, but above-ground water demand is low.

Water at planting and for the first month. Per Missouri Botanical Garden, "newly planted trees need 1 inch of water per week through fall." This is especially important for zones with dry falls (parts of the Midwest, the West).

Hardy perennial planting

Perennials planted in October have 3–4 weeks to establish roots before the ground freezes. Per Penn State Extension, "plant by 6 weeks before the average first hard frost" for reliable establishment. In zone 7 (first hard frost ~November 1), that's September 20–October 20.

Clean up only what you need to

Per University of Minnesota Extension, "leaving perennial seed heads and dried stems over winter provides wildlife habitat and overwinter protection for the crown." I leave coneflower, black-eyed Susan, sedum, and ornamental grass seed heads standing through winter. The birds eat the seeds; the stems trap snow that insulates the crowns.

Protect tender plants

Tender perennials that need protection in zones 5–7: Dahlias (dig before frost or mulch deeply in zone 8+), canna rhizomes (dig before frost), caladiums (zone 8+), elephant ears (dig or mulch in zone 7b+).

State planting calendars

• New York: /planting/ny/
• Pennsylvania: /planting/pa/
• New Jersey: /planting/nj/
• Georgia: /planting/ga/
• Texas: /planting/tx/

Common mistakes

Frequently asked

Can I still plant bulbs in October if the soil is still warm?

Wait until the soil cools below 55°F. Per Missouri Botanical Garden, bulbs planted in warm soil are likely to begin growth before dormancy and be killed by freezing. This is especially critical for tulips and hyacinths. Daffodils are more tolerant of early planting; alliums are the most forgiving of warm-soil planting.

How late can I plant spring bulbs?

As long as the soil is not frozen solid, spring bulbs can be planted. Late-planted bulbs (November–December in zone 6–7) will bloom and may develop somewhat smaller flowers than properly timed plantings, but they will bloom. Per Penn State Extension, "bulbs planted in November are better than no bulbs at all."

Is it too late to divide hostas in October?

It's at the edge of the window. Per Missouri Botanical Garden, "hostas divided in early fall (September) establish better than those divided in October, which may not have enough time to establish roots before frost." Division in October is possible but carries more risk than early fall or spring division.

Sources

1. Penn State Extension — Garlic Planting and Spring Bulbs
2. Missouri Botanical Garden — Bulb Planting Guide
3. NC State Extension — Spring Bulbs
4. Clemson HGIC — Fall Vegetable Planting
5. Texas A&M AgriLife Extension — Fall Garden Calendar
6. University of Minnesota Extension — Garden Cleanup