Asparagus Planting Guide
asparagus this month
asparagus rewards gardeners who pay attention to a few basics. Here's what matters in May, wherever you're growing.
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How to water asparagus
About an inch of water a week keeps asparagus happy. Check your weather forecast before watering — skip if rain is coming.
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Where to put asparagus
asparagus wants at least 6 hours of direct sun. Less than that and you'll get leggy plants with weak yields.
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Check your local forecast before planting
Your zone determines the exact week to plant asparagus. Pick your county below and we'll line everything up against your frost dates.
Asparagus is a long-lived perennial vegetable that produces tender spears each spring for 15-20 years once established. It requires patience but rewards with reliable harvests.
Asparagus officinalis · Vegetable · Asparagaceae family · 730–1095 days to maturity
Get Your Personalized Asparagus Planting Dates
Enter your ZIP code to see exact planting dates, soil compatibility, and growing tips specific to your county.
Where Can You Grow Asparagus?
Asparagus Growing Regions
Click any state to see the Asparagus planting schedule for that location.
Planting Dates by Zone
| Zone | Start Indoors | Direct Sow | Transplant | Harvest |
|---|---|---|---|---|
| Zone 3a | — | — | May 29 | — |
| Zone 3b | — | — | May 24 | — |
| Zone 4a | — | — | May 20 | — |
| Zone 4b | — | — | May 15 | — |
| Zone 5a | — | — | May 9 | — |
| Zone 5b | — | — | May 2 | — |
| Zone 6a | — | — | Apr 24 | — |
| Zone 6b | — | — | Apr 17 | — |
| Zone 7a | — | — | Apr 8 | — |
| Zone 7b | — | — | Apr 1 | — |
| Zone 8a | — | — | Mar 22 | — |
| Zone 8b | — | — | Mar 11 | — |
| Zone 9a | — | — | Feb 24 | — |
| Zone 9b | — | — | Feb 8 | — |
| Zone 10a | — | — | Jan 15 | — |
| Zone 10b | — | — | Jan 15 | — |
Why are some columns showing "—"?
Start Indoors shows "—" because Asparagus is typically direct sown outdoors rather than started indoors. It germinates quickly and doesn't transplant well.
Direct Sow shows "—" because Asparagus benefits from being started indoors first, then transplanted after the last frost.
How to Plant Asparagus
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
Water when the top inch of soil feels dry. Consistent moisture produces the best results.
🧪 Soil pH
6.5 – 7.5
Prefers neutral to slightly acidic soil — ideal for most garden beds.
🗺️ Hardiness Zones
Zone 3a – 10b
📅 Days to Maturity
730–1095 days
Long-season crop. Start indoors in cold climates to get a head start.
👪 Plant Family
Asparagaceae
Rotate with other families yearly to prevent soil-borne diseases. Don't plant in the same spot where Asparagaceae family crops grew last year.
How Much Asparagus to Grow
Asparagus takes 730–1095 days to mature. In most zones you'll get one harvest per season, so plant enough to last.
Companion Planting for Asparagus
✅ Good Companions
❌ Keep Away From
Check more combinations with our Companion Planting Checker →
Growing Tips for Asparagus
Plant crowns in deep trenches with compost. Do not harvest spears for the first two years to allow root establishment. Mulch heavily to suppress weeds and retain moisture.
Saving Asparagus Seeds
Recommended for Your Garden
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Keep your garden organized with durable, weather-resistant plant labels.
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Asparagus by State
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently Asked Questions
How long does it take to grow Asparagus?
Asparagus (Asparagus officinalis) takes 730 to 1095 days from planting to harvest. Exact timing depends on your variety, growing conditions, and USDA zone.
What zones can Asparagus grow in?
Asparagus can be grown in USDA zones 3a through 10b. Use the planting calendar above to find the exact dates for your zone.
How much sun does Asparagus need?
Growing Asparagus requires Full Sun (6-8+ hours), Moderate — regular watering, and soil pH of 6.5 to 7.5.