Heirloom Sunflower Seeds
Heirloom Sunflower Seeds
293 Ratings
Couldn't load pickup availability
Grow a striking display of tall, golden blooms with these Heirloom Sunflower Seeds. Specially selected for their height and structure, these seeds produce sunflowers that stand out in any outdoor setting. Their large, bright yellow petals and sturdy stems make them suitable for garden borders, open landscapes, and pollinator-friendly planting areas.
These heirloom seeds are non-GMO and offer reliable growth for both current and future seasons. Each plant can reach a height of 9 to 12 feet, creating an impressive vertical element in the garden. The large flower heads also make them a popular choice for cutting gardens and seasonal displays.
Why Choose These Heirloom Sunflower Seeds
These seeds offer dependable growth and are ideal for gardeners looking to add strong visual appeal to their outdoor space. The plants thrive in full sunlight and well-drained soil and are naturally tolerant to dry conditions once established. Whether grown in clusters or rows, they create an eye-catching backdrop during the warmer months.
Key Features
- Growth Height: Reaches 9–12 feet tall with bold flower heads
- Bloom Time: Spring to Summer
- Sunlight Required: Full Sun
- Attributes: Heirloom, Non-GMO, Drought Tolerant
- Usage: Outdoor planting in gardens, borders, and open fields
- Quantity: 50 seeds per packet
- Seed Type: Mammoth Grey Stripe variety
Planting Instructions
- Choose a sunny location with well-draining soil
- Sow seeds ½ inch deep and space them about 18 inches apart
- Keep soil moist until seeds germinate (typically 7–14 days)
- Thin seedlings as they grow to provide adequate space
- Expect blooms in 90 to 110 days
Care Guidelines
- Water deeply but infrequently to encourage deep roots
- Use mulch to retain soil moisture and reduce weeds
- Provide support if growing in windy areas due to plant height
- Harvest when the flower heads begin to dry and turn downward
Overview
Create a towering floral display with Heirloom Sunflower Seeds a classic choice for gardeners aiming to fill outdoor spaces with seasonal height and color. These seeds offer a natural way to brighten landscapes and attract pollinators while delivering robust growth throughout the growing season
- Soil requirements: Heirloom sunflower seeds prefer well-drained, loamy soil with a pH level between 6.0 and 7.5. The soil should be rich in organic matter to support healthy growth.
- Sunlight needs: These seeds require full sun, which means they need at least 6 to 8 hours of direct sunlight per day.
- Watering requirements: Sunflowers need moderate watering. Water them deeply but infrequently, allowing the soil to dry out between waterings. Overwatering can lead to root rot.
- Planting season: The best time to plant heirloom sunflower seeds is in the spring, after the last frost has passed and the soil has warmed up to at least 50°F (10°C).
- Depth and spacing: Plant the seeds about 1 to 1.5 inches deep and space them 6 to 12 inches apart, depending on the variety. Rows should be spaced about 30 inches apart.
- Germination time: Heirloom sunflower seeds typically germinate within 7 to 10 days under optimal conditions.
- Maturity time: Sunflowers generally reach maturity in 70 to 100 days, depending on the variety.
- Harvesting time: The best time to harvest sunflower seeds is when the back of the flower head turns yellow and the seeds are plump and slightly loose. This usually occurs in late summer to early fall.
- Harvesting tips: To harvest, cut the flower head with about 12 inches of stem attached. Hang the heads upside down in a dry, well-ventilated area to allow them to fully dry. Once dry, rub the seeds off the head and store them in a cool, dry place. Use gloves to protect your hands from the rough texture of the sunflower heads.
