Worcester (01609) — USDA Zone 6a

Frost dates and growing season for 01609

These are 50%-probability averages modeled from this ZIP's USDA hardiness zone and regional climate normals — not a single-station reading. In a typical year the last spring frost will have passed by May 10, but in a colder-than-average year it can run 1-2 weeks later. Plant tender crops (tomatoes, peppers, basil) once both soil and night temperatures are consistently warm — a thermometer beats the calendar.

Growing season in Worcester

Worcester, Massachusetts sits in USDA Zone 6a, with roughly 147 frost-free days between an average last spring frost around May 10 and a first fall frost around October 4. That is a standard temperate season — most common vegetables finish comfortably, and a single main planting plus one succession round works well. Worcester lies near 42.3°N; higher-latitude gardens get longer midsummer days but a tighter shoulder season at this zone.

What grows in Worcester

Worcester falls in USDA Zone 6a, which means the same hardiness constraints apply as the full Zone 6 guide. Vegetables, herbs, and fruit trees rated to Zone 6a (or hardier) will overwinter here in a typical year.

• Tomatoes (all types)
• Peppers, eggplant
• Squash, melons, cucumbers
• Beans, peas
• Sweet corn
• Apples, pears, peaches, plums
• Cherries, blueberries
• Asparagus, rhubarb
• Garlic (fall-planted)
• Strawberries

What to plant in Worcester this week

Worcester is in high summer — most spring plantings are in. Keep an eye on watering and start planning your fall crop. Cool-season seedlings (broccoli, cabbage, lettuce) can be started indoors for a fall transplant.

• When to plant tomatoes in zone 6
• When to plant peppers in zone 6
• When to plant bush beans in zone 6
• When to plant cucumbers in zone 6
• When to plant basil in zone 6

Full planting calendar for Worcester

Crop-by-crop sowing, transplant, and harvest dates calibrated to zone 6 averages:

• When to plant tomatoes in zone 6
• When to plant peppers in zone 6
• When to plant basil in zone 6
• When to plant garlic in zone 6
• When to plant lettuce in zone 6
• When to plant bush beans in zone 6
• When to plant cucumbers in zone 6
• When to plant summer squash in zone 6
• When to plant peas in zone 6
• When to plant carrots in zone 6
• When to plant broccoli in zone 6
• When to plant cauliflower in zone 6
• When to plant cabbage in zone 6
• When to plant kale in zone 6
• When to plant brussels sprouts in zone 6
• When to plant collard greens in zone 6
• When to plant spinach in zone 6
• When to plant swiss chard in zone 6
• When to plant arugula in zone 6
• When to plant beets in zone 6
• When to plant radishes in zone 6
• When to plant turnips in zone 6
• When to plant parsnips in zone 6
• When to plant kohlrabi in zone 6
• When to plant onions in zone 6
• When to plant leeks in zone 6
• When to plant celery in zone 6
• When to plant asparagus in zone 6
• When to plant rhubarb in zone 6
• When to plant potatoes in zone 6
• When to plant sweet potatoes in zone 6
• When to plant eggplant in zone 6
• When to plant okra in zone 6
• When to plant sweet corn in zone 6
• When to plant pumpkins in zone 6
• When to plant winter squash in zone 6
• When to plant zucchini in zone 6
• When to plant cantaloupe in zone 6
• When to plant watermelon in zone 6
• When to plant pole beans in zone 6
• When to plant edamame in zone 6
• When to plant fava beans in zone 6
• When to plant cilantro in zone 6
• When to plant dill in zone 6
• When to plant parsley in zone 6
• When to plant oregano in zone 6
• When to plant thyme in zone 6
• When to plant sage in zone 6
• When to plant chives in zone 6

Local microclimate notes

Zone tables give you the average — but Worcestergardens vary. South-facing walls and paved areas can run a full half-zone warmer than the published rating. Low-lying spots, frost pockets, and shaded north sides can run colder. If you've gardened here a few seasons, your own frost record (the last time you actually got frost damage) is more accurate than any national average.

Source and methodology

Hardiness zone from the USDA Plant Hardiness Zone Map (2023 revision). Frost-date and growing-season figures are modeled from this ZIP's USDA hardiness zone and regional NOAA 1991-2020 climate normals — they are zone-level estimates, not a per-station record, so treat them as planning guidance and confirm against your own local frost history. Crop recommendations are drawn from US Cooperative Extension references and curated by the Growli editorial team. Last reviewed May 2026.

Nearby ZIP codes in Massachusetts

• 02108 — Boston (Zone 7a)
• 02139 — Cambridge (Zone 7a)
• 01103 — Springfield (Zone 6a)
• 02118 — Boston (South End) (Zone 7a)
• 02124 — Boston (Dorchester) (Zone 7a)
• 02125 — Boston (Dorchester North) (Zone 7a)
• 02151 — Revere (Zone 7a)
• 02143 — Somerville (Zone 6b)
• 02148 — Malden (Zone 6b)
• 02301 — Brockton (Zone 6b)
• 02740 — New Bedford (Zone 7a)
• 02720 — Fall River (Zone 7a)
• Browse all US ZIP codes by state

Related guides

• USDA hardiness zone for Worcester, MA
• USDA Zone 6 — full plant + frost guide
• Look up another ZIP code
• Watering frequency calculator
• How to start a vegetable garden — beginner guide