When to Plant Broccoli in Dixie, WA

Broccoli is a nutrient-dense cool-season crop that produces large central heads followed by smaller side shoots. It is one of the most popular garden vegetables.

Dixie, Washington is in USDA Zone 7a. The average last spring frost is April 20 and the first fall frost is October 15, giving you a growing season of approximately 178 days.

At an elevation of 3,151 feet, Walla Walla County receives approximately 23.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Broccoli during the growing season.

Dixie, WA (Zone 7a) Moderate season

178 days

❄

Last Spring Frost April 20

➔ 178 growing days ➔

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First Fall Frost October 15

Dixie Soil Profile

Soil Type

Silt Loam

Soil pH

6.0-7.0

Drainage

Well Drained

How Much Broccoli to Grow

1-2 lbs

Average yield per plant

Plants per person

6 sq ft

Space per person

For a family of 4, plant approximately 12 broccoli plants in about 24 sq ft. In Walla Walla County's 178-day season, you'll have plenty of time for a full harvest. Plan your garden layout →

Zone Compatibility for Broccoli Zones 2a – 11b

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a You 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Ideal (data available) Suitable Marginal Not recommended

Broccoli Planting Timeline — Dixie, WA

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Last Frost

First Frost

Start Indoors

Mar 16 – Mar 30

Transplant

Apr 20 – May 4

Direct Sow

Apr 6 – Apr 27

Fall Sowing

Aug 6 – Aug 20

Harvest

Jun 22 – Aug 3

Growing season Start indoors Transplant Direct sow Harvest

Broccoli Planting Calendar

Activity	When	Date Range
Start Indoors	March 16	Mar 16 – Mar 30
Transplant Outdoors	April 20	Apr 20 – May 4
Direct Sow	April 6	Apr 6 – Apr 27
Harvest	June 22	Jun 22 – Aug 3
Fall Sowing	August 6	Aug 6 – Aug 20

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

Month	Activities
January	—
February	—
March	Start Indoors
April	Transplant Outdoors Direct Sow
May	Transplant Outdoors
June	Harvest
July	Harvest
August	Fall Sowing Harvest
September	—
October	—
November	—
December	—

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

Moderate — regular watering

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7 · Your soil: N/A

🗺️ USDA Zone

Zone 7a

📆 Growing Season

178 days in Walla Walla County

Growing Tips for Dixie

Start seeds indoors 6-8 weeks before last frost. Provide consistent moisture to prevent hollow stems. Harvest heads before yellow flowers appear.

Companion Planting

Good Companions

Avoid Planting Near

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Broccoli Seeds

Life Cycle Biennial

Pollination Cross-Pollinated (insects)

How to Collect Allow plants to flower 2nd year; collect dry pods.

Storage Store airtight; viable 5 years at 35°F, under 50% humidity.

Isolate 1/2 mile from other brassicas. Biennial — must overwinter roots.

Get our full Seed Saving Guide for 200 plants →

Broccoli in Other Locations

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Your Walla Walla County Garden Planner — Free

A 22-page printable planner built for Walla Walla County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.