Growing Strawberries from Seed: Extraction, Stratification, and Sowing

Starting strawberries from seed is a fun project, but it requires patience—plants typically fruit in their second year. Here’s how to do it right.

Seed Extraction and Preparation

1. Pick fully ripe berries. Blend with water and let the pulp float; viable seeds sink.
2. Rinse seeds clean and spread on a paper towel to dry completely (several days).

Cold Stratification (Required)

Strawberry seeds need a cold period to break dormancy. Place dry seeds in a sealed container or bag with a slightly damp paper towel and refrigerate for at least 3 months (90 days). This mimics winter.

Sowing and Growing

1. After stratification, sow seeds on the surface of moist, sterile seed-starting mix. Do not cover—light aids germination.
2. Keep at 65–75°F (18–24°C) under fluorescent lights (12–16 hrs/day).
3. Germination is slow and sporadic: 2–4 weeks, sometimes longer.
4. Transplant seedlings to individual cells when they have 2–3 true leaves.
5. Grow under lights until after last frost, then harden off 10 days before planting outdoors in full sun.

Note: Seeds from hybrid strawberries (most store-bought) won’t grow true to type. For predictable results, use seeds from heirloom or open-pollinated varieties.