Asparagus Seeds: Identifying and Planting the Red Berries

Those bright orange-red berries on your asparagus ferns are indeed seeds. Each berry contains several black seeds. While asparagus is typically started from 1-year-old crowns for faster harvests, growing from seed is rewarding and allows you to select strong plants.

Harvesting and Preparing Seeds

Collect berries when fully ripe (deep red, soft). Soak in water for a day or two, then mash gently to separate seeds from pulp. Viable seeds sink; discard floaters. Rinse thoroughly and dry on a screen for 1–2 weeks. Store in a cool, dry place in a labeled envelope.

When and How to Plant

Indoors (recommended): Start seeds 12–14 weeks before your last frost date. Soak seeds in warm water for 24 hours to speed germination. Sow ½ inch deep in seed-starting mix. Keep at 70–85°F (21–29°C); germination takes 2–8 weeks. Transplant seedlings to larger pots as they grow.

Outdoors: In areas with long growing seasons, direct-sow after soil reaches 60°F (16°C). Prepare a nursery bed with rich, well-drained soil. Thin to 6 inches apart.

Transplanting to Permanent Bed

After the first growing season, dig up dormant crowns in early spring or late fall. Select the largest, healthiest crowns. Plant in a prepared trench 12–18 inches wide, 6–8 inches deep, spaced 12–18 inches apart. Spread roots over a mound of compost, cover with 2 inches of soil, and gradually fill the trench as spears emerge.

Patience Pays Off

Seed-grown asparagus takes 3–4 years to reach full production, versus 2–3 years from crowns. But you'll have a wider genetic pool and the satisfaction of growing from seed. The berries confirm your plants are mature and healthy—enjoy the process!