Concord Grape Fruit Seeds - Sweet Black Grapes for Garden Vines

1. Seed Stratification (Pre-treatment):

• Place seeds in moist sand or paper towel in a plastic bag.

• Refrigerate at 1–5°C (34–41°F) for 90–120 days.

• This cold stratification process mimics natural winter conditions and improves germination rates.

2. Germination:

• After stratification, plant seeds 1/2 inch deep in seed-starting mix.

• Keep soil consistently moist and place in a warm, sunny spot (18–24°C or 65–75°F).

• Germination may take 2–8 weeks.

3. Transplanting Outdoors:

• Transplant seedlings after the last frost when plants are 4–6 inches tall.

• Choose a sunny location with well-draining soil.

• Space vines 6–10 feet apart and provide a trellis or support.

4. Care & Maintenance:

• Water regularly during dry periods but avoid overwatering.

• Prune annually during dormancy to encourage fruit production.

• Fertilize in early spring with balanced fertilizer.

Harvest:

• Expect fruits in 2–3 years. Harvest when grapes are fully deep purple and sweet.