When and How to Start Harvesting Asparagus Spears

Asparagus is one of the earliest spring vegetables, prized for its tender, flavorful spears. Harvesting at the right time ensures peak taste while maintaining plant health for future seasons. With over 30 years of asparagus-growing experience in my California garden, I’ve learned the precise timing and techniques that maximize yield and spear quality.

Table of Contents

When to Start Harvesting

Age Matters: Wait until crowns are at least two to three years old before harvesting.
Spring Timing: Begin when spears reach 6–10 inches tall, typically in early to mid-spring depending on your climate.
Stop Signs: Spears that are thin, sparse, or slow-growing signal the end of the harvest period.

How to Harvest Properly

Daily Picking: Check beds every morning during peak season for tender, uniform spears.
Cutting Technique: Use a sharp knife to cut just above the soil line, or snap by hand at the base.
Avoid Damage: Handle spears gently to prevent bruising and avoid injuring the crown.

Post-Harvest Care

Fertilize: After harvest, side-dress with compost or balanced organic fertilizer to support fern growth.
Allow Ferns to Grow: Let remaining spears grow into ferns to store energy for next year.
Monitor Pests: Continue watching for asparagus beetles and aphids to protect crowns.

My Experience and Key Takeaways

In my Sonoma Valley garden, waiting until the third year for a full harvest ensures strong, long-lived crowns. Daily monitoring and careful cutting produce the best-tasting spears while preserving plant vigor for decades.

Asparagus Growing Hub

Start here: The Ultimate Asparagus Growing Guide: From Seed to Harvest

Planting & Establishment

Care & Maintenance

Pests & Diseases

Harvest & Storage

Kitchen & Varieties

Stephen Albert

Stephen Albert is a horticulturist, master gardener, and certified nurseryman who has taught at the University of California for more than 25 years. He holds graduate degrees from the University of California and the University of Iowa. His books include Vegetable Garden Grower’s Guide, Vegetable Garden Almanac & Planner, Tomato Grower’s Answer Book, and Kitchen Garden Grower’s Guide. His Vegetable Garden Grower’s Masterclass is available online. Harvesttotable.com has more than 10 million visitors each year.

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