Regional guide

Napa County Seasonal Vegetable Planting Calendar

UC Master Gardeners Napa County guide linking seasonal harvest pages, seed-starting advice, and a calendar-format planting PDF.

Climate signals

• The main UC Master Gardeners of Napa County Vegetable Planting Calendar at https://ucanr.edu/site/uc-master-gardeners-napa-county/vegetable-planting-calendar links Fall, Winter, Spring, and Summer harvest pages, Seed Starting, Vegetable Varieties, Vegetable Garden Basics, and a calendar-format Napa County PDF.
• The Fall Harvest page at https://ucanr.edu/site/uc-master-gardeners-napa-county/fall-harvest says to plant in late spring and early summer for a fall harvest.
• The Winter Harvest page at https://ucanr.edu/site/uc-master-gardeners-napa-county/winter-harvest says to plant in late summer and fall for a winter harvest.
• The Spring Harvest page at https://ucanr.edu/site/uc-master-gardeners-napa-county/spring-harvest says to plant in winter for a spring harvest.
• The Summer Harvest page at https://ucanr.edu/site/uc-master-gardeners-napa-county/summer-harvest says to plant in spring for a summer harvest and notes cantaloupes and watermelons may not mature in southern areas of the county or during cool summers.
• The Seed Starting page at https://ucanr.edu/site/uc-master-gardeners-napa-county/seed-starting and seed-starting PDF at https://ucanr.edu/sites/default/files/2015-04/211694.pdf say Napa County's typical last-frost date is April 15; in heavy clay soil common in Napa County, plant a little shallower or cover seeds with fine soil or vermiculite.

Planning notes

• Fall crop rows include green beans, beets, broccoli, cabbage, carrots, chard, corn, cucumber, eggplant, lettuce, parsley, peas, peppers, tomatoes, turnips, and winter squash.
• Winter crop rows include beets, broccoli, cabbage, carrots, cauliflower, chard, lettuce, green onions, parsley, and turnips.
• Spring crop rows include beets, broccoli, cabbage, carrots, chard, lettuce, green onions, parsley, peas, and turnips.
• Summer crop rows include green beans, beets, cabbage, carrots, cantaloupes, chard, corn, cucumber, eggplant, lettuce, green onions, parsley, peas, peppers, pumpkins, tomatoes, and watermelon.
• Seed-starting guidance says broccoli, cauliflower, eggplant, parsley, peppers, and tomatoes are typically started indoors; crops started in containers or in the ground include basil, cucumbers, lettuces, Asian greens, melons, onions, pumpkins, and summer and winter squash; beans, beets, carrots, chard, peas, and turnips are typically started in the ground.
• Seed-starting guidance says seeds need water, oxygen, appropriate soil temperature, and sometimes light; the calendar-format PDF at https://ucanr.edu/sites/default/files/2012-04/141547.pdf is the Summer/Fall and Winter/Spring Vegetable Planting Guide for Napa County and says planting and harvesting season depends on type, variety, and weather, best spring planting near the beginning of the shown period, and early types can be planted up to 10 days later.
• Catalog priority examples cover Beans, Beets, Broccoli, Cabbage, Carrots, Cauliflower, Chard, Corn, Cucumbers, Eggplant, Lettuce, Cantaloupes, Green Onions, Parsley, Peas, Peppers, Pumpkins, Tomatoes, Turnips, and Winter Squash.
• Use priority catalog links as crop-row examples, not UC cultivar recommendations.
• Artichokes, asparagus, Brussels sprouts, dry onions or shallots, garlic, potatoes, radish, rutabaga, spinach, rhubarb, summer squash, watermelon, and zucchini are source rows left unlinked where catalog priority mapping is weak or was not chosen.

Catalog crop examples

These catalog entries match crops covered by the regional timing source; variety-specific details remain tied to each seed entry's own source.

• Provider Bush Bean Vegetable · Warm · 50 days
• Detroit Dark Red Beet Vegetable · Cool · 58 days
• Waltham 29 Broccoli Vegetable · Cool · 74 days
• Golden Acre Cabbage Vegetable · Cool · 64 days
• Danvers 126 Carrot Vegetable · Shoulder · 70 days
• Snowball Y Cauliflower Vegetable · Cool · 70 days
• Bright Lights Swiss Chard Vegetable · Shoulder · 55 days
• Golden Bantam Sweet Corn Vegetable · Warm · 80 days
• Marketmore 76 Cucumber Vegetable · Warm · 58 days
• Black Beauty Eggplant Vegetable · Warm · 80 days
• Black Seeded Simpson Lettuce Vegetable · Cool · 45 days
• Hale's Best Jumbo Melon Vegetable · Warm · 85 days
• Evergreen Bunching Onion Vegetable · Shoulder · 65 days
• Italian Flat Leaf Parsley Herb · Shoulder · 75 days
• Sugar Snap Pea Vegetable · Cool · 62 days
• California Wonder Pepper Vegetable · Warm · 72 days
• Small Sugar Pumpkin Vegetable · Warm · 100 days
• Waltham Butternut Squash Vegetable · Warm · 95 days
• Roma Tomato Vegetable · Warm · 76 days
• Purple Top White Globe Turnip Vegetable · Cool · 55 days

Related regional guides

• Contra Costa Interior Vegetable Garden A Contra Costa interior guide for Sunset zones 14-16, spring/summer beds, fall/winter resets, bean heat limits, artichoke frost risk, and interior timing.
• San Mateo/San Francisco Microclimate Calendar UC ANR calendar for San Mateo and San Francisco hot, sunny, and foggy vegetable planting windows plus year-round bed turnover.
• Santa Clara County Vegetable Planting Chart UC Master Gardener chart for central Santa Clara County seeding, transplanting, borderline months, and warm/cool seasons.
• Alameda West of East Bay Hills Planting Guide UC Alameda County Master Gardener guide for west of the East Bay Hills maritime gardens, microclimate caveats, and crop rows.
• Sonoma County Vegetable Planting Summary UC Master Gardener Sonoma guide for local direct seeding, transplanting, weather protection, spacing, and maturity timing.
• Marin County Monthly Edible Garden Schedule UC Marin Master Gardeners monthly edible schedule for sowing inside/outside, transplants, and maintenance rows.

Source: UC Master Gardeners of Napa County Vegetable Planting Calendar