Local planting guide · Northeast
zip 02238
Cambridge is in USDA hardiness zone 6b, with average winter lows of -5°F to 0°F. The local growing season runs roughly 04/04 through 11/09 (~218 days). This zip falls within the Northeast growing region.
- USDA zone
- 6b -5°F to 0°F
- Last spring frost
- 04/04
- First fall frost
- 11/09
- Growing season
- 218 days
- Compatible crops
- 87
- Growing region
- Northeast
Right now in Cambridge
Week 18 priorities
On the docket: transplant out after last frost · direct sow after last frost. See the full calendar →
Gardening in Cambridge
Cambridge sits in USDA hardiness zone 6b, where winter lows dip to -5 to 0°F but the real constraint isn't cold, it's the unpredictable spring. The last spring frost arrives around April 4, relatively late by zone 6b standards, which makes early-blooming fruit trees risky; a warm March followed by a killing April freeze is a classic New England trap. The growing season stretches to 218 days, long enough for cold-hardy stone and pome fruits. Apples, pears, and sour cherries thrive here with minimal fuss. Peaches are possible but require careful variety selection, only the hardiest cultivars survive the regular -5°F winters. The bigger challenge is summer humidity, which opens the door for fire blight in pear and apple, cedar-apple rust, and powdery mildew on stone fruits. Cambridge's institutional gardens and residential yards lean heavily on proven performers: apple and pear for structure, cherry for spring color, plum as a secondary crop. The zone supports a genuine fruit gardening culture, not a tropical fantasy.
Regional context · Northeast
What the Northeast brings to Cambridge
Cold winters, short to medium growing seasons. Apples, pears, blueberries, raspberries, and cool-climate vegetables dominate. Strong cider-apple and maple-syrup tradition.
Common challenges
Issues that most often defeat home gardeners in zone 6b, drawn from the broader USDA zone profile.
- ▸ Cedar-apple rust
- ▸ Fire blight
- ▸ Stink bugs
What defeats new gardeners in Cambridge
Spring frost timing is the primary adversary. Early April frosts, even after a mild March, routinely nip apple and pear blossoms, wiping out an entire year's crop before growth even slows down. The unpredictability, not the depth of cold, is what defeats gardeners; a week of 65°F days in late March followed by a -2°F night in early April is routine. Fire blight compounds the frustration; the disease rides in on warm, wet springs (April and May), targeting pear trees and susceptible apple varieties with sudden wilting and canker death. Fungal pressure increases in humid summers, and power-spraying every 10 days is unsustainable for home growers. A third challenge: peaches demand chill hours and heat, making the zone marginal. Only the most winter-hardy and late-blooming peach varieties survive regular winter temperatures and spring frost without constant replacement.
Crops that grow in Cambridge
87 crops from our catalog match zone 6b, grouped by type.
Tree fruit
12 crops
zone 6b Apple
Malus domestica
zones 3a–9a
zone 6b Pear
Pyrus communis
zones 4a–8b
zone 6b Peach
Prunus persica
zones 5a–9a
zone 6b European Plum
Prunus domestica
zones 4a–8a
zone 6b Japanese Plum
Prunus salicina
zones 5b–9a
zone 6b Sweet Cherry
Prunus avium
zones 5a–8a
zone 6b Sour Cherry
Prunus cerasus
zones 4a–7b
zone 6b American Persimmon
Diospyros virginiana
zones 4b–9a
Berries
20 crops
zone 6b Highbush Blueberry
Vaccinium corymbosum
zones 4a–7b
zone 6b Lowbush Blueberry
Vaccinium angustifolium
zones 3a–6b
zone 6b Red Raspberry
Rubus idaeus
zones 3b–8a
zone 6b Black Raspberry
Rubus occidentalis
zones 4a–8a
zone 6b Yellow Raspberry
Rubus idaeus
zones 3b–8a
zone 6b Blackberry
Rubus subgenus Rubus
zones 5a–9a
zone 6b June-Bearing Strawberry
Fragaria x ananassa
zones 3a–8b
zone 6b Everbearing Strawberry
Fragaria x ananassa
zones 3b–9a
Nuts
6 crops
Vegetables
40 crops
zone 6b Tomato
Solanum lycopersicum
zones 3a–10b
zone 6b Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 6b Hot Pepper
Capsicum species
zones 4a–10b
zone 6b Eggplant
Solanum melongena
zones 5a–10b
zone 6b Potato
Solanum tuberosum
zones 3a–9a
zone 6b Cabbage
Brassica oleracea var. capitata
zones 3a–9b
zone 6b Broccoli
Brassica oleracea var. italica
zones 3a–9a
zone 6b Cauliflower
Brassica oleracea var. botrytis
zones 3b–9a
Herbs
9 crops
zone 6b Basil
Ocimum basilicum
zones 4a–10b
zone 6b Parsley
Petroselinum crispum
zones 3b–9b
zone 6b Cilantro / Coriander
Coriandrum sativum
zones 3b–9b
zone 6b Dill
Anethum graveolens
zones 3b–9a
zone 6b Oregano
Origanum vulgare
zones 4a–9b
zone 6b Thyme
Thymus vulgaris
zones 4a–9a
zone 6b Sage
Salvia officinalis
zones 4a–9a
zone 6b Mint
Mentha species
zones 3b–9b
Plan the year
Planting calendar for Cambridge
Year-view of seed starting, transplanting, planting, pruning, fertilizing, harvest, and pest-watch windows tuned to Cambridge's local frost dates.
Week ? · loading
This week in Cambridge, MA (zone 6b)
Quiet week in Cambridge, MA (zone 6b). this week is a good time to step back and plan ahead.
Nothing critical on the calendar this week.
434 bars · 87 crops
Calendar logic combines NOAA frost normals with crop-specific timing data. Local microclimate and weather always overrules the calendar; use this as a starting point.
Top pests for zone 6b
Ranked by how many crops in your zone they affect. Click through for IPM controls and signs to watch for.
Multiple species (Aphididae)
Small soft-bodied sap-sucking insects that reproduce explosively in spring. Excrete honeydew that supports sooty mold and attracts ants. Transmit viral diseases.
Odocoileus species
Whitetail and mule deer browse can devastate orchards and gardens, particularly in winter when food is scarce. Antler rub on young trunks kills saplings outright.
Multiple species
Robins, catbirds, mockingbirds, starlings, cedar waxwings and other songbirds can strip ripening berry and fruit crops in days. Crows and blackbirds also damage fresh sweet corn ears in milk stage. The single biggest yield-loss factor in unprotected home plantings.
Sylvilagus and Lepus species
Cottontails and jackrabbits strip bark from young fruit trees in winter and graze tender garden vegetables year-round, especially seedlings.
Popillia japonica
Defoliating beetle introduced to North America in 1916. Skeletonizes leaves of many fruit trees, berry canes, and pecan.
Multiple species (Chrysomelidae)
Tiny black or bronze jumping beetles that put hundreds of small holes in seedling leaves. Most damaging on direct-seeded brassicas and young eggplant.
Tetranychus urticae
Tiny mite that feeds on leaf undersides, causing stippling and webbing during hot dry weather.
Microtus species
Field voles and meadow voles girdle young fruit-tree trunks under snow cover during winter and chew root crops. The leading cause of mysterious orchard losses.
Top diseases for zone 6b
Ranked by how many crops in your zone they affect. Click through for symptoms, controls, and resistant varieties.
Botrytis cinerea
Ubiquitous fungal disease that causes fruit rot during cool wet weather, often the dominant berry disease in humid regions.
Pseudoperonospora cubensis (cucurbits) and others
Water mold (oomycete, not a true fungus) that thrives in cool damp conditions. Spreads rapidly through cucurbit and brassica plantings on wind-borne spores.
Pythium and Rhizoctonia species
Soil-borne complex of water molds and fungi that kill seedlings before or shortly after emergence. The single most common cause of seed-starting failures.
Cucumber mosaic virus, Tobacco mosaic virus, and others
Family of plant viruses producing mottled yellow-and-green leaf patterns. Vectored primarily by aphids; some are seed-transmitted or spread by handling tools and tobacco products.
Agrobacterium tumefaciens
Soil-borne bacterium that enters plants through wounds and induces tumor-like galls on roots, crown, and lower stems. Galls reduce vigor and shorten plant lifespan; on Rubus the disease is often fatal.
Fusarium oxysporum
Soil-borne fungal disease that plugs vascular tissue and kills affected plants. Persists in soil for many years; impossible to eliminate once established.
Sclerotium rolfsii
Soil-borne fungal disease most damaging in warm humid Southern conditions. White mycelial fans and small mustard-seed-sized sclerotia at the soil line are diagnostic.
Plasmodiophora brassicae
Soil-borne disease causing characteristic distorted club-shaped roots on brassicas. Persists in soil for 10-20 years; the dominant brassica pathogen in acidic poorly-drained soils.
Companion planting suggestions
Beneficial pairings drawn from companion data, filtered to crops that grow in zone 6b.
- Peach + Garlic
Garlic planted around peach trees suppresses peach borer and provides general fungal-pressure reduction.
- European Plum + Garlic
Garlic discourages plum curculio and provides general antifungal benefit beneath stone fruit.
- American Persimmon + Pawpaw
Both natives thrive in similar soils and contribute to a polyculture that supports native pollinators and fauna.
- Jujube + Thyme
Thyme groundcover suits jujube's low-water profile and deters cabbage moth and aphid populations.
- Apricot + Basil
Basil's volatile oils discourage stone-fruit pests and support pollinator visits.
- Highbush Blueberry + Thyme
Creeping thyme thrives in the acidic mulched conditions blueberries require and attracts pollinators during bloom.
Soil types reference
Soil texture and pH decide what grows easily on your specific lot. Find the closest match below for crop recommendations and amendment guidance.
Practical tips for Cambridge
Select late-blooming apple and pear varieties to sidestep the April frost window. Cultivars that break bud a week or two later than 'Honeycrisp' or 'Bartlett' shift the gamble, not eliminate it, but reduce odds. Fire blight pressure is highest in wet springs, so prune infected wood immediately after discovery, disinfect pruning tools between cuts, and space trees for good air circulation; resistant or tolerant varieties move the needle. Finally, stagger heat-loving crops like peaches or tender stone fruits across multiple years with cold-hardy backups; one bad winter won't exhaust your planting strategy. Monitor frost forecasts closely in late March and early April; a frost cloth over a young tree or small shrub can mean the difference between blossom and branch loss.
Frequently asked questions
- What fruit trees grow most reliably in Cambridge?
Apples and pears are the foundation crops, reliable, long-lived, and forgiving of zone 6b winters. Sour cherries and European plums follow close behind. Peaches and Japanese plums are possible but demand more attention to variety selection and winter protection.
- When is the last spring frost in Cambridge, and how does it affect planting?
The last average spring frost is April 4. This timing is critical for fruit tree care: blossoms can be killed by a late freeze, and tender perennials should wait until mid-May before moving outdoors. Monitor forecasts in March and April.
- Can I grow peaches successfully in zone 6b?
Yes, but with constraints. Choose only the hardiest varieties rated for zone 6 or colder, avoid low-lying frost pockets, and accept that some winters will kill the flower buds even if the tree survives. Sour cherry is a safer alternative if peaches disappoint.
- What's the biggest disease threat in Cambridge's humid climate?
Fire blight in spring and early summer is the primary concern, particularly for pears and susceptible apple varieties. It rides in on warm, wet weather in April and May. Resistant varieties and prompt removal of infected wood are the best defenses.
- How do I protect early blossoms from late spring frosts?
Plant late-blooming varieties when possible. For established trees at risk, frost cloth or burlap draped overnight during frost warnings can save a crop. Position trees on north-facing slopes to delay bud break.
- What's the growing season length in Cambridge?
From last spring frost (April 4) to first fall frost (November 9) is 218 days, enough for most cold-hardy crops. For long-season crops like tomatoes, start seeds indoors 6 to 8 weeks before the spring frost date to maximize your window.
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Frost data: NOAA Climate Normals 1991-2020, station USW00014739. Local microclimates can shift these dates by a week or more.
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